Porterville Weather Records (USC00047077)
Record envelope, standing records and threshold days for Porterville (USC00047077), California, United States, with 103 years of record.
Key Facts for Porterville
- Porterville (USC00047077) is a weather station in California, United States at 36.07 latitude and -119.02 longitude, 120 m (393 ft) above sea level.
- The station reports from 1902 to 2004, 103 years of record.
- 1,464 records set at Porterville still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Porterville set a daily record high maximum temperature of 38.9 C (102.0 F) on 5 May 2004.
About the Station
- Location: California, United States, 36.07 latitude, -119.02 longitude.
- Elevation: 120 m (393 ft).
- Period of record: 1902 to 2004, 103 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 30.0 C (86.0 F) | -7.8 C (18.0 F) | n/a | n/a |
| Feb | 29.4 C (84.9 F) | -6.7 C (19.9 F) | n/a | n/a |
| Mar | 32.8 C (91.0 F) | -2.2 C (28.0 F) | n/a | n/a |
| Apr | 38.3 C (100.9 F) | -3.3 C (26.1 F) | n/a | n/a |
| May | 42.8 C (109.0 F) | 0.6 C (33.1 F) | n/a | n/a |
| Jun | 44.4 C (111.9 F) | -1.1 C (30.0 F) | n/a | n/a |
| Jul | 45.6 C (114.1 F) | 6.7 C (44.1 F) | n/a | n/a |
| Aug | 45.0 C (113.0 F) | 6.1 C (43.0 F) | n/a | n/a |
| Sep | 44.4 C (111.9 F) | 2.8 C (37.0 F) | n/a | n/a |
| Oct | 39.4 C (102.9 F) | -1.1 C (30.0 F) | n/a | n/a |
| Nov | 35.0 C (95.0 F) | -5.6 C (21.9 F) | n/a | n/a |
| Dec | 30.0 C (86.0 F) | -8.9 C (16.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1902 | 9 |
| 1903 | 28 |
| 1904 | 20 |
| 1905 | 22 |
| 1906 | 11 |
| 1907 | 16 |
| 1908 | 25 |
| 1909 | 14 |
| 1910 | 21 |
| 1911 | 27 |
| 1912 | 20 |
| 1913 | 42 |
| 1914 | 5 |
| 1915 | 11 |
| 1916 | 23 |
| 1917 | 9 |
| 1918 | 17 |
| 1919 | 19 |
| 1920 | 41 |
| 1921 | 22 |
| 1922 | 19 |
| 1923 | 15 |
| 1924 | 15 |
| 1925 | 21 |
| 1926 | 22 |
| 1927 | 16 |
| 1928 | 11 |
| 1929 | 23 |
| 1930 | 14 |
| 1931 | 18 |
| 1932 | 19 |
| 1933 | 33 |
| 1934 | 9 |
| 1935 | 18 |
| 1936 | 12 |
| 1937 | 16 |
| 1938 | 11 |
| 1939 | 12 |
| 1940 | 9 |
| 1941 | 6 |
| 1942 | 7 |
| 1943 | 6 |
| 1944 | 9 |
| 1945 | 9 |
| 1946 | 10 |
| 1947 | 19 |
| 1948 | 11 |
| 1949 | 16 |
| 1950 | 26 |
| 1951 | 7 |
| 1952 | 9 |
| 1953 | 20 |
| 1954 | 12 |
| 1955 | 12 |
| 1956 | 9 |
| 1957 | 10 |
| 1958 | 7 |
| 1959 | 6 |
| 1960 | 12 |
| 1961 | 19 |
| 1962 | 17 |
| 1963 | 25 |
| 1964 | 18 |
| 1965 | 13 |
| 1966 | 15 |
| 1967 | 10 |
| 1968 | 14 |
| 1969 | 7 |
| 1970 | 7 |
| 1971 | 11 |
| 1972 | 22 |
| 1973 | 11 |
| 1974 | 9 |
| 1975 | 5 |
| 1976 | 18 |
| 1977 | 14 |
| 1978 | 15 |
| 1979 | 7 |
| 1980 | 11 |
| 1981 | 10 |
| 1982 | 13 |
| 1983 | 7 |
| 1984 | 7 |
| 1985 | 9 |
| 1986 | 15 |
| 1987 | 19 |
| 1988 | 5 |
| 1989 | 21 |
| 1990 | 14 |
| 1991 | 11 |
| 1992 | 2 |
| 1993 | 5 |
| 1994 | 1 |
| 1995 | 10 |
| 1996 | 14 |
| 1997 | 15 |
| 1998 | 18 |
| 1999 | 7 |
| 2000 | 16 |
| 2001 | 11 |
| 2002 | 9 |
| 2003 | 10 |
| 2004 | 9 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1940-01-11 | Record daily precipitation | Record daily precipitation 68.1 mm (2.7 in) |
| 1969-02-25 | Record daily precipitation | Record daily precipitation 69.1 mm (2.7 in) |
| 1990-12-23 | Record low minimum temperature | Record low minimum temperature -8.9 C (16.0 F) |
| 1999-01-25 | Record snow depth | Record snow depth 7.6 cm (3.0 in) |
Wettest Day of Each Month
Feb: 69.1 mm (2.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 68.1 mm (2.7 in) | 11 January 1940 |
| Feb | 69.1 mm (2.7 in) | 25 February 1969 |
| Mar | 42.7 mm (1.7 in) | 3 March 1938 |
| Apr | 38.1 mm (1.5 in) | 28 April 1906 |
| May | 46.5 mm (1.8 in) | 27 May 1971 |
| Jun | 20.3 mm (0.8 in) | 5 June 1993 |
| Jul | 7.6 mm (0.30 in) | 21 July 1913 |
| Aug | 6.4 mm (0.25 in) | 18 August 1977 |
| Sep | 39.4 mm (1.6 in) | 30 September 1976 |
| Oct | 54.1 mm (2.1 in) | 19 October 1972 |
| Nov | 43.9 mm (1.7 in) | 12 November 1944 |
| Dec | 59.4 mm (2.3 in) | 6 December 1966 |
Period of Record Coverage
1902 to 2004| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1902 | 177 | 48% | No |
| 1903 | 303 | 83% | No |
| 1904 | 347 | 95% | Yes |
| 1905 | 307 | 84% | No |
| 1906 | 304 | 83% | No |
| 1907 | 365 | 100% | Yes |
| 1908 | 366 | 100% | Yes |
| 1909 | 365 | 100% | Yes |
| 1910 | 364 | 100% | Yes |
| 1911 | 363 | 99% | Yes |
| 1912 | 360 | 98% | Yes |
| 1913 | 364 | 100% | Yes |
| 1914 | 364 | 100% | Yes |
| 1915 | 214 | 59% | No |
| 1916 | 335 | 92% | Yes |
| 1917 | 304 | 83% | No |
| 1918 | 364 | 100% | Yes |
| 1919 | 356 | 98% | Yes |
| 1920 | 360 | 98% | Yes |
| 1921 | 365 | 100% | Yes |
| 1922 | 362 | 99% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 366 | 100% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 362 | 99% | Yes |
| 1927 | 362 | 99% | Yes |
| 1928 | 359 | 98% | Yes |
| 1929 | 361 | 99% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 365 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 364 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 364 | 100% | Yes |
| 1943 | 363 | 99% | Yes |
| 1944 | 365 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 365 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 358 | 98% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 363 | 99% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 359 | 98% | Yes |
| 1960 | 361 | 99% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 360 | 99% | Yes |
| 1972 | 365 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 364 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 364 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 365 | 100% | Yes |
| 1993 | 364 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 364 | 100% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 365 | 100% | Yes |
| 2001 | 364 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 334 | 92% | Yes |
| 2004 | 182 | 50% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 5 May 2004 | Porterville, US | daily high max | 38.9 C (102.0 F) | 1.7 C (3.1 F) | 12 years | 16 of 100 (Routine) |
| 3 May 2004 | Porterville, US | daily high min | 17.8 C (64.0 F) | 1.7 C (3.1 F) | 57 years | 31 of 100 (Routine) |
| 28 April 2004 | Porterville, US | daily high max | 36.7 C (98.1 F) | 1.1 C (2.0 F) | 17 years | 17 of 100 (Routine) |
| 27 April 2004 | Porterville, US | daily high max | 36.7 C (98.1 F) | 1.1 C (2.0 F) | 78 years | 35 of 100 (Notable) |
| 12 April 2004 | Porterville, US | daily high min (Tie) | 14.4 C (57.9 F) | tie | 97 years | 9 of 100 (Routine) |
| 30 March 2004 | Porterville, US | monthly high max (Tie) | 32.8 C (91.0 F) | tie | 35 years | 7 of 100 (Routine) |
| 25 March 2004 | Porterville, US | daily high min (Tie) | 12.8 C (55.0 F) | tie | 7 years | 3 of 100 (Routine) |
| 22 March 2004 | Porterville, US | daily high min | 14.4 C (57.9 F) | 1.1 C (2.0 F) | 7 years | 15 of 100 (Routine) |
| 21 March 2004 | Porterville, US | daily high min | 15.6 C (60.1 F) | 1.7 C (3.1 F) | 3 years | 15 of 100 (Routine) |
| 21 March 2004 | Porterville, US | daily high max (Tie) | 31.7 C (89.1 F) | tie | 76 years | 8 of 100 (Routine) |
| 20 March 2004 | Porterville, US | daily high max (Tie) | 30.6 C (87.1 F) | tie | 44 years | 5 of 100 (Routine) |
| 19 March 2004 | Porterville, US | monthly high max (Tie) | 32.8 C (91.0 F) | tie | 34 years | 7 of 100 (Routine) |
| 16 March 2004 | Porterville, US | daily high min | 13.3 C (55.9 F) | 1.1 C (2.0 F) | 96 years | 41 of 100 (Notable) |
| 12 March 2004 | Porterville, US | daily high max | 30.0 C (86.0 F) | 1.7 C (3.1 F) | 94 years | 41 of 100 (Notable) |
| 11 March 2004 | Porterville, US | daily high min (Tie) | 13.3 C (55.9 F) | tie | 15 years | 3 of 100 (Routine) |
| 26 February 2004 | Porterville, US | daily rain | 29.2 mm (1.1 in) | 14.2 mm (0.6 in) | 64 years | 47 of 100 (Notable) |
| 3 February 2004 | Porterville, US | daily rain | 17.3 mm (0.7 in) | 0.5 mm (0.02 in) | 45 years | 20 of 100 (Routine) |
| 7 December 2003 | Porterville, US | daily high min | 12.2 C (54.0 F) | 0.5 C (0.9 F) | 96 years | 39 of 100 (Notable) |
| 29 October 2003 | Porterville, US | daily high max | 33.3 C (91.9 F) | 1.1 C (2.0 F) | 88 years | 38 of 100 (Notable) |
| 22 October 2003 | Porterville, US | daily high max (Tie) | 34.4 C (93.9 F) | tie | 89 years | 9 of 100 (Routine) |
Climate Trend
93 complete years, 1907 to 2002| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1907 | 17.2 C | -0.37 C |
| 1908 | 17.3 C | -0.34 C |
| 1909 | 17.1 C | -0.48 C |
| 1910 | 18.3 C | +0.66 C |
| 1911 | 18.0 C | +0.41 C |
| 1912 | 17.8 C | +0.17 C |
| 1913 | 18.2 C | +0.62 C |
| 1914 | 17.9 C | +0.35 C |
| 1918 | 17.1 C | -0.50 C |
| 1919 | 17.1 C | -0.51 C |
| 1920 | 16.2 C | -1.41 C |
| 1921 | 17.5 C | -0.10 C |
| 1922 | 16.8 C | -0.80 C |
| 1923 | 16.5 C | -1.05 C |
| 1924 | 17.1 C | -0.46 C |
| 1925 | 17.0 C | -0.62 C |
| 1926 | 18.8 C | +1.16 C |
| 1927 | 17.0 C | -0.61 C |
| 1928 | 17.2 C | -0.37 C |
| 1929 | 16.8 C | -0.84 C |
| 1930 | 16.6 C | -0.99 C |
| 1931 | 17.7 C | +0.08 C |
| 1932 | 17.2 C | -0.35 C |
| 1933 | 16.9 C | -0.67 C |
| 1934 | 18.1 C | +0.52 C |
| 1935 | 17.1 C | -0.50 C |
| 1936 | 18.2 C | +0.62 C |
| 1937 | 17.6 C | +0.03 C |
| 1938 | 17.3 C | -0.27 C |
| 1939 | 18.1 C | +0.46 C |
| 1940 | 18.2 C | +0.60 C |
| 1941 | 17.3 C | -0.26 C |
| 1942 | 16.9 C | -0.70 C |
| 1943 | 17.3 C | -0.25 C |
| 1944 | 16.8 C | -0.78 C |
| 1945 | 17.3 C | -0.33 C |
| 1946 | 16.8 C | -0.83 C |
| 1947 | 17.0 C | -0.59 C |
| 1948 | 16.1 C | -1.54 C |
| 1949 | 16.8 C | -0.78 C |
| 1950 | 17.9 C | +0.30 C |
| 1951 | 17.3 C | -0.34 C |
| 1952 | 17.0 C | -0.61 C |
| 1953 | 16.6 C | -1.04 C |
| 1954 | 16.9 C | -0.68 C |
| 1955 | 16.5 C | -1.06 C |
| 1956 | 17.1 C | -0.49 C |
| 1957 | 17.4 C | -0.21 C |
| 1958 | 18.3 C | +0.70 C |
| 1959 | 18.3 C | +0.71 C |
| 1960 | 17.7 C | +0.14 C |
| 1961 | 17.6 C | 0.00 C |
| 1962 | 17.1 C | -0.47 C |
| 1963 | 16.8 C | -0.80 C |
| 1964 | 16.8 C | -0.79 C |
| 1965 | 17.0 C | -0.59 C |
| 1966 | 17.9 C | +0.30 C |
| 1967 | 17.4 C | -0.16 C |
| 1968 | 17.4 C | -0.23 C |
| 1969 | 17.4 C | -0.17 C |
| 1970 | 17.9 C | +0.31 C |
| 1971 | 16.8 C | -0.77 C |
| 1972 | 17.3 C | -0.33 C |
| 1973 | 17.9 C | +0.35 C |
| 1974 | 17.8 C | +0.23 C |
| 1975 | 17.2 C | -0.38 C |
| 1976 | 17.4 C | -0.21 C |
| 1977 | 17.6 C | +0.02 C |
| 1978 | 17.7 C | +0.10 C |
| 1979 | 18.2 C | +0.62 C |
| 1980 | 18.1 C | +0.54 C |
| 1981 | 18.8 C | +1.18 C |
| 1982 | 17.2 C | -0.40 C |
| 1983 | 18.0 C | +0.38 C |
| 1984 | 18.3 C | +0.71 C |
| 1985 | 17.8 C | +0.20 C |
| 1986 | 18.7 C | +1.12 C |
| 1987 | 18.3 C | +0.74 C |
| 1988 | 18.4 C | +0.83 C |
| 1989 | 18.0 C | +0.42 C |
| 1990 | 18.1 C | +0.51 C |
| 1991 | 18.2 C | +0.62 C |
| 1992 | 18.3 C | +0.75 C |
| 1993 | 17.7 C | +0.11 C |
| 1994 | 17.9 C | +0.32 C |
| 1995 | 19.1 C | +1.50 C |
| 1996 | 19.3 C | +1.71 C |
| 1997 | 19.2 C | +1.57 C |
| 1998 | 17.8 C | +0.23 C |
| 1999 | 18.1 C | +0.46 C |
| 2000 | 18.8 C | +1.23 C |
| 2001 | 19.1 C | +1.52 C |
| 2002 | 18.6 C | +1.00 C |
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1907 to 2002. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 93 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.1 C (0.1 to 0.2) per decade | 0.2 F (0.1 to 0.3) per decade | 1907 to 2002 | 93 | Rise |
| Mean daily maximum | 0.01 C (-0.05 to 0.07) per decade | 0.02 F (-0.08 to 0.12) per decade | 1907 to 2002 | 93 | Not clearly different from zero |
| Mean daily minimum | 0.2 C (0.2 to 0.3) per decade | 0.4 F (0.3 to 0.5) per decade | 1907 to 2002 | 93 | Rise |
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1902 to 2004| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 45.6 C (114.1 F) | 1905 | 42.8 C (109.0 F) | 103 |
| Coldest night (TNn) | -8.9 C (16.0 F) | 1990 | -3.9 C (25.0 F) | 103 |
| Wettest day (Rx1day) | 69.1 mm (2.7 in) | 1969 | 29.5 mm (1.2 in) | 103 |
| Wettest five days (Rx5day) | 140.1 mm (5.5 in) | 1966 | 47.5 mm (1.9 in) | 103 |
| Longest dry spell (CDD) | 216 days | 1914 | 122 days | 103 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1902 | 43.9 C (111.0 F) |
| 1903 | 41.7 C (107.1 F) |
| 1904 | 44.4 C (111.9 F) |
| 1905 | 45.6 C (114.1 F) |
| 1906 | 42.8 C (109.0 F) |
| 1907 | 39.4 C (102.9 F) |
| 1908 | 45.6 C (114.1 F) |
| 1909 | 41.1 C (106.0 F) |
| 1910 | 43.9 C (111.0 F) |
| 1911 | 43.3 C (109.9 F) |
| 1912 | 45.0 C (113.0 F) |
| 1913 | 45.6 C (114.1 F) |
| 1914 | 41.7 C (107.1 F) |
| 1915 | 42.2 C (108.0 F) |
| 1916 | 41.7 C (107.1 F) |
| 1917 | 41.7 C (107.1 F) |
| 1918 | 42.2 C (108.0 F) |
| 1919 | 42.8 C (109.0 F) |
| 1920 | 43.9 C (111.0 F) |
| 1921 | 44.4 C (111.9 F) |
| 1922 | 42.8 C (109.0 F) |
| 1923 | 42.8 C (109.0 F) |
| 1924 | 43.3 C (109.9 F) |
| 1925 | 45.6 C (114.1 F) |
| 1926 | 45.6 C (114.1 F) |
| 1927 | 42.2 C (108.0 F) |
| 1928 | 42.8 C (109.0 F) |
| 1929 | 44.4 C (111.9 F) |
| 1930 | 41.7 C (107.1 F) |
| 1931 | 45.0 C (113.0 F) |
| 1932 | 43.3 C (109.9 F) |
| 1933 | 45.0 C (113.0 F) |
| 1934 | 43.3 C (109.9 F) |
| 1935 | 43.9 C (111.0 F) |
| 1936 | 43.9 C (111.0 F) |
| 1937 | 43.3 C (109.9 F) |
| 1938 | 43.9 C (111.0 F) |
| 1939 | 42.8 C (109.0 F) |
| 1940 | 43.3 C (109.9 F) |
| 1941 | 42.8 C (109.0 F) |
| 1942 | 42.8 C (109.0 F) |
| 1943 | 40.0 C (104.0 F) |
| 1944 | 41.7 C (107.1 F) |
| 1945 | 41.7 C (107.1 F) |
| 1946 | 41.1 C (106.0 F) |
| 1947 | 40.6 C (105.1 F) |
| 1948 | 40.6 C (105.1 F) |
| 1949 | 42.2 C (108.0 F) |
| 1950 | 44.4 C (111.9 F) |
| 1951 | 42.2 C (108.0 F) |
| 1952 | 40.6 C (105.1 F) |
| 1953 | 40.6 C (105.1 F) |
| 1954 | 42.8 C (109.0 F) |
| 1955 | 42.8 C (109.0 F) |
| 1956 | 43.3 C (109.9 F) |
| 1957 | 44.4 C (111.9 F) |
| 1958 | 41.1 C (106.0 F) |
| 1959 | 42.8 C (109.0 F) |
| 1960 | 43.3 C (109.9 F) |
| 1961 | 44.4 C (111.9 F) |
| 1962 | 40.6 C (105.1 F) |
| 1963 | 41.1 C (106.0 F) |
| 1964 | 43.9 C (111.0 F) |
| 1965 | 39.4 C (102.9 F) |
| 1966 | 42.2 C (108.0 F) |
| 1967 | 42.2 C (108.0 F) |
| 1968 | 42.2 C (108.0 F) |
| 1969 | 41.7 C (107.1 F) |
| 1970 | 42.8 C (109.0 F) |
| 1971 | 42.8 C (109.0 F) |
| 1972 | 45.0 C (113.0 F) |
| 1973 | 43.3 C (109.9 F) |
| 1974 | 42.8 C (109.0 F) |
| 1975 | 44.4 C (111.9 F) |
| 1976 | 44.4 C (111.9 F) |
| 1977 | 41.7 C (107.1 F) |
| 1978 | 41.7 C (107.1 F) |
| 1979 | 43.3 C (109.9 F) |
| 1980 | 43.3 C (109.9 F) |
| 1981 | 42.2 C (108.0 F) |
| 1982 | 41.7 C (107.1 F) |
| 1983 | 41.7 C (107.1 F) |
| 1984 | 42.8 C (109.0 F) |
| 1985 | 42.2 C (108.0 F) |
| 1986 | 40.6 C (105.1 F) |
| 1987 | 41.1 C (106.0 F) |
| 1988 | 42.2 C (108.0 F) |
| 1989 | 42.2 C (108.0 F) |
| 1990 | 43.3 C (109.9 F) |
| 1991 | 43.9 C (111.0 F) |
| 1992 | 41.1 C (106.0 F) |
| 1993 | 41.7 C (107.1 F) |
| 1994 | 42.2 C (108.0 F) |
| 1995 | 42.2 C (108.0 F) |
| 1996 | 44.4 C (111.9 F) |
| 1997 | 43.3 C (109.9 F) |
| 1998 | 42.8 C (109.0 F) |
| 1999 | 42.2 C (108.0 F) |
| 2000 | 42.2 C (108.0 F) |
| 2001 | 42.8 C (109.0 F) |
| 2002 | 41.7 C (107.1 F) |
| 2003 | 41.1 C (106.0 F) |
| 2004 | 38.9 C (102.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1902 | -2.2 C (28.0 F) |
| 1903 | -6.7 C (19.9 F) |
| 1904 | -6.7 C (19.9 F) |
| 1905 | -6.7 C (19.9 F) |
| 1906 | -3.3 C (26.1 F) |
| 1907 | -1.7 C (28.9 F) |
| 1908 | -5.6 C (21.9 F) |
| 1909 | -2.8 C (27.0 F) |
| 1910 | -3.3 C (26.1 F) |
| 1911 | -4.4 C (24.1 F) |
| 1912 | -3.3 C (26.1 F) |
| 1913 | -7.8 C (18.0 F) |
| 1914 | -1.1 C (30.0 F) |
| 1915 | -4.4 C (24.1 F) |
| 1916 | -2.8 C (27.0 F) |
| 1917 | -5.0 C (23.0 F) |
| 1918 | -3.3 C (26.1 F) |
| 1919 | -3.9 C (25.0 F) |
| 1920 | -3.3 C (26.1 F) |
| 1921 | -4.4 C (24.1 F) |
| 1922 | -5.6 C (21.9 F) |
| 1923 | -5.0 C (23.0 F) |
| 1924 | -5.0 C (23.0 F) |
| 1925 | -2.8 C (27.0 F) |
| 1926 | -5.6 C (21.9 F) |
| 1927 | -3.9 C (25.0 F) |
| 1928 | -5.0 C (23.0 F) |
| 1929 | -6.7 C (19.9 F) |
| 1930 | -6.1 C (21.0 F) |
| 1931 | -5.6 C (21.9 F) |
| 1932 | -4.4 C (24.1 F) |
| 1933 | -3.3 C (26.1 F) |
| 1934 | -2.2 C (28.0 F) |
| 1935 | -4.4 C (24.1 F) |
| 1936 | -2.2 C (28.0 F) |
| 1937 | -7.2 C (19.0 F) |
| 1938 | -3.9 C (25.0 F) |
| 1939 | -2.8 C (27.0 F) |
| 1940 | -5.0 C (23.0 F) |
| 1941 | -1.7 C (28.9 F) |
| 1942 | -3.9 C (25.0 F) |
| 1943 | -6.1 C (21.0 F) |
| 1944 | -2.2 C (28.0 F) |
| 1945 | -3.3 C (26.1 F) |
| 1946 | -3.9 C (25.0 F) |
| 1947 | -3.9 C (25.0 F) |
| 1948 | -5.6 C (21.9 F) |
| 1949 | -6.7 C (19.9 F) |
| 1950 | -7.2 C (19.0 F) |
| 1951 | -4.4 C (24.1 F) |
| 1952 | -4.4 C (24.1 F) |
| 1953 | -3.3 C (26.1 F) |
| 1954 | -3.9 C (25.0 F) |
| 1955 | -3.9 C (25.0 F) |
| 1956 | -3.9 C (25.0 F) |
| 1957 | -3.9 C (25.0 F) |
| 1958 | -2.8 C (27.0 F) |
| 1959 | -3.3 C (26.1 F) |
| 1960 | -5.0 C (23.0 F) |
| 1961 | -5.0 C (23.0 F) |
| 1962 | -6.7 C (19.9 F) |
| 1963 | -6.1 C (21.0 F) |
| 1964 | -2.8 C (27.0 F) |
| 1965 | -3.3 C (26.1 F) |
| 1966 | -2.8 C (27.0 F) |
| 1967 | -5.6 C (21.9 F) |
| 1968 | -4.4 C (24.1 F) |
| 1969 | -3.3 C (26.1 F) |
| 1970 | -3.9 C (25.0 F) |
| 1971 | -5.0 C (23.0 F) |
| 1972 | -5.6 C (21.9 F) |
| 1973 | -3.9 C (25.0 F) |
| 1974 | -4.4 C (24.1 F) |
| 1975 | -3.9 C (25.0 F) |
| 1976 | -3.9 C (25.0 F) |
| 1977 | -3.9 C (25.0 F) |
| 1978 | -5.0 C (23.0 F) |
| 1979 | -3.3 C (26.1 F) |
| 1980 | -2.2 C (28.0 F) |
| 1981 | -0.6 C (30.9 F) |
| 1982 | -2.8 C (27.0 F) |
| 1983 | -0.6 C (30.9 F) |
| 1984 | -1.7 C (28.9 F) |
| 1985 | -2.8 C (27.0 F) |
| 1986 | -0.6 C (30.9 F) |
| 1987 | -4.4 C (24.1 F) |
| 1988 | -2.8 C (27.0 F) |
| 1989 | -5.0 C (23.0 F) |
| 1990 | -8.9 C (16.0 F) |
| 1991 | -2.8 C (27.0 F) |
| 1992 | -3.3 C (26.1 F) |
| 1993 | -4.4 C (24.1 F) |
| 1994 | -2.2 C (28.0 F) |
| 1995 | -0.6 C (30.9 F) |
| 1996 | -0.6 C (30.9 F) |
| 1997 | -3.3 C (26.1 F) |
| 1998 | -6.1 C (21.0 F) |
| 1999 | -3.9 C (25.0 F) |
| 2000 | -1.7 C (28.9 F) |
| 2001 | -1.7 C (28.9 F) |
| 2002 | -4.4 C (24.1 F) |
| 2003 | -1.7 C (28.9 F) |
| 2004 | -1.7 C (28.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1902 | 19.1 mm (0.8 in) |
| 1903 | 14.5 mm (0.6 in) |
| 1904 | 35.3 mm (1.4 in) |
| 1905 | 29.2 mm (1.1 in) |
| 1906 | 38.1 mm (1.5 in) |
| 1907 | 25.7 mm (1.0 in) |
| 1908 | 42.9 mm (1.7 in) |
| 1909 | 33.3 mm (1.3 in) |
| 1910 | 27.7 mm (1.1 in) |
| 1911 | 27.7 mm (1.1 in) |
| 1912 | 24.1 mm (0.9 in) |
| 1913 | 39.9 mm (1.6 in) |
| 1914 | 32.5 mm (1.3 in) |
| 1915 | 27.4 mm (1.1 in) |
| 1916 | 36.3 mm (1.4 in) |
| 1917 | 34.5 mm (1.4 in) |
| 1918 | 33.5 mm (1.3 in) |
| 1919 | 27.9 mm (1.1 in) |
| 1920 | 34.8 mm (1.4 in) |
| 1921 | 32.5 mm (1.3 in) |
| 1922 | 29.5 mm (1.2 in) |
| 1923 | 16.8 mm (0.7 in) |
| 1924 | 33.0 mm (1.3 in) |
| 1925 | 42.2 mm (1.7 in) |
| 1926 | 26.4 mm (1.0 in) |
| 1927 | 35.6 mm (1.4 in) |
| 1928 | 27.9 mm (1.1 in) |
| 1929 | 31.8 mm (1.3 in) |
| 1930 | 31.2 mm (1.2 in) |
| 1931 | 31.8 mm (1.3 in) |
| 1932 | 14.7 mm (0.6 in) |
| 1933 | 49.5 mm (1.9 in) |
| 1934 | 26.2 mm (1.0 in) |
| 1935 | 23.6 mm (0.9 in) |
| 1936 | 43.2 mm (1.7 in) |
| 1937 | 31.8 mm (1.3 in) |
| 1938 | 42.7 mm (1.7 in) |
| 1939 | 25.7 mm (1.0 in) |
| 1940 | 68.1 mm (2.7 in) |
| 1941 | 27.9 mm (1.1 in) |
| 1942 | 27.2 mm (1.1 in) |
| 1943 | 34.0 mm (1.3 in) |
| 1944 | 43.9 mm (1.7 in) |
| 1945 | 41.1 mm (1.6 in) |
| 1946 | 26.7 mm (1.1 in) |
| 1947 | 9.9 mm (0.39 in) |
| 1948 | 29.7 mm (1.2 in) |
| 1949 | 25.4 mm (1.0 in) |
| 1950 | 20.3 mm (0.8 in) |
| 1951 | 31.2 mm (1.2 in) |
| 1952 | 29.7 mm (1.2 in) |
| 1953 | 22.6 mm (0.9 in) |
| 1954 | 43.2 mm (1.7 in) |
| 1955 | 18.3 mm (0.7 in) |
| 1956 | 21.3 mm (0.8 in) |
| 1957 | 23.6 mm (0.9 in) |
| 1958 | 27.7 mm (1.1 in) |
| 1959 | 22.6 mm (0.9 in) |
| 1960 | 31.0 mm (1.2 in) |
| 1961 | 24.4 mm (1.0 in) |
| 1962 | 36.6 mm (1.4 in) |
| 1963 | 26.7 mm (1.1 in) |
| 1964 | 20.3 mm (0.8 in) |
| 1965 | 20.3 mm (0.8 in) |
| 1966 | 59.4 mm (2.3 in) |
| 1967 | 28.7 mm (1.1 in) |
| 1968 | 26.9 mm (1.1 in) |
| 1969 | 69.1 mm (2.7 in) |
| 1970 | 40.9 mm (1.6 in) |
| 1971 | 46.5 mm (1.8 in) |
| 1972 | 54.1 mm (2.1 in) |
| 1973 | 41.1 mm (1.6 in) |
| 1974 | 33.0 mm (1.3 in) |
| 1975 | 18.3 mm (0.7 in) |
| 1976 | 39.4 mm (1.6 in) |
| 1977 | 23.1 mm (0.9 in) |
| 1978 | 46.5 mm (1.8 in) |
| 1979 | 16.5 mm (0.6 in) |
| 1980 | 26.7 mm (1.1 in) |
| 1981 | 40.4 mm (1.6 in) |
| 1982 | 23.4 mm (0.9 in) |
| 1983 | 36.1 mm (1.4 in) |
| 1984 | 20.3 mm (0.8 in) |
| 1985 | 33.5 mm (1.3 in) |
| 1986 | 29.5 mm (1.2 in) |
| 1987 | 17.3 mm (0.7 in) |
| 1988 | 27.7 mm (1.1 in) |
| 1989 | 24.6 mm (1.0 in) |
| 1990 | 17.0 mm (0.7 in) |
| 1991 | 37.8 mm (1.5 in) |
| 1992 | 22.9 mm (0.9 in) |
| 1993 | 27.2 mm (1.1 in) |
| 1994 | 28.7 mm (1.1 in) |
| 1995 | 36.8 mm (1.4 in) |
| 1996 | 32.5 mm (1.3 in) |
| 1997 | 27.4 mm (1.1 in) |
| 1998 | 28.4 mm (1.1 in) |
| 1999 | 38.1 mm (1.5 in) |
| 2000 | 21.8 mm (0.9 in) |
| 2001 | 34.3 mm (1.4 in) |
| 2002 | 29.5 mm (1.2 in) |
| 2003 | 35.3 mm (1.4 in) |
| 2004 | 29.2 mm (1.1 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1902 | 26.2 mm (1.0 in) |
| 1903 | 34.8 mm (1.4 in) |
| 1904 | 45.0 mm (1.8 in) |
| 1905 | 71.9 mm (2.8 in) |
| 1906 | 75.1 mm (3.0 in) |
| 1907 | 47.5 mm (1.9 in) |
| 1908 | 52.0 mm (2.0 in) |
| 1909 | 65.3 mm (2.6 in) |
| 1910 | 45.0 mm (1.8 in) |
| 1911 | 39.4 mm (1.6 in) |
| 1912 | 45.3 mm (1.8 in) |
| 1913 | 64.6 mm (2.5 in) |
| 1914 | 71.3 mm (2.8 in) |
| 1915 | 39.6 mm (1.6 in) |
| 1916 | 63.0 mm (2.5 in) |
| 1917 | 58.6 mm (2.3 in) |
| 1918 | 42.4 mm (1.7 in) |
| 1919 | 42.9 mm (1.7 in) |
| 1920 | 36.6 mm (1.4 in) |
| 1921 | 80.0 mm (3.1 in) |
| 1922 | 47.0 mm (1.9 in) |
| 1923 | 30.2 mm (1.2 in) |
| 1924 | 36.0 mm (1.4 in) |
| 1925 | 50.6 mm (2.0 in) |
| 1926 | 79.5 mm (3.1 in) |
| 1927 | 50.5 mm (2.0 in) |
| 1928 | 44.7 mm (1.8 in) |
| 1929 | 32.3 mm (1.3 in) |
| 1930 | 33.8 mm (1.3 in) |
| 1931 | 55.1 mm (2.2 in) |
| 1932 | 43.5 mm (1.7 in) |
| 1933 | 109.1 mm (4.3 in) |
| 1934 | 41.7 mm (1.6 in) |
| 1935 | 49.6 mm (2.0 in) |
| 1936 | 58.9 mm (2.3 in) |
| 1937 | 61.0 mm (2.4 in) |
| 1938 | 95.0 mm (3.7 in) |
| 1939 | 30.3 mm (1.2 in) |
| 1940 | 91.2 mm (3.6 in) |
| 1941 | 42.5 mm (1.7 in) |
| 1942 | 50.4 mm (2.0 in) |
| 1943 | 74.4 mm (2.9 in) |
| 1944 | 63.5 mm (2.5 in) |
| 1945 | 84.0 mm (3.3 in) |
| 1946 | 38.2 mm (1.5 in) |
| 1947 | 14.0 mm (0.6 in) |
| 1948 | 31.0 mm (1.2 in) |
| 1949 | 37.1 mm (1.5 in) |
| 1950 | 28.9 mm (1.1 in) |
| 1951 | 38.8 mm (1.5 in) |
| 1952 | 56.6 mm (2.2 in) |
| 1953 | 29.5 mm (1.2 in) |
| 1954 | 52.9 mm (2.1 in) |
| 1955 | 37.9 mm (1.5 in) |
| 1956 | 47.9 mm (1.9 in) |
| 1957 | 48.2 mm (1.9 in) |
| 1958 | 70.9 mm (2.8 in) |
| 1959 | 34.3 mm (1.4 in) |
| 1960 | 46.8 mm (1.8 in) |
| 1961 | 31.5 mm (1.2 in) |
| 1962 | 105.1 mm (4.1 in) |
| 1963 | 39.3 mm (1.5 in) |
| 1964 | 43.2 mm (1.7 in) |
| 1965 | 51.3 mm (2.0 in) |
| 1966 | 140.1 mm (5.5 in) |
| 1967 | 50.5 mm (2.0 in) |
| 1968 | 31.2 mm (1.2 in) |
| 1969 | 101.3 mm (4.0 in) |
| 1970 | 75.5 mm (3.0 in) |
| 1971 | 67.0 mm (2.6 in) |
| 1972 | 60.5 mm (2.4 in) |
| 1973 | 71.1 mm (2.8 in) |
| 1974 | 46.0 mm (1.8 in) |
| 1975 | 42.6 mm (1.7 in) |
| 1976 | 62.6 mm (2.5 in) |
| 1977 | 46.8 mm (1.8 in) |
| 1978 | 104.6 mm (4.1 in) |
| 1979 | 31.5 mm (1.2 in) |
| 1980 | 65.5 mm (2.6 in) |
| 1981 | 43.0 mm (1.7 in) |
| 1982 | 52.1 mm (2.1 in) |
| 1983 | 78.8 mm (3.1 in) |
| 1984 | 35.8 mm (1.4 in) |
| 1985 | 53.1 mm (2.1 in) |
| 1986 | 63.2 mm (2.5 in) |
| 1987 | 36.4 mm (1.4 in) |
| 1988 | 39.7 mm (1.6 in) |
| 1989 | 30.2 mm (1.2 in) |
| 1990 | 37.8 mm (1.5 in) |
| 1991 | 70.5 mm (2.8 in) |
| 1992 | 59.0 mm (2.3 in) |
| 1993 | 62.8 mm (2.5 in) |
| 1994 | 35.1 mm (1.4 in) |
| 1995 | 57.7 mm (2.3 in) |
| 1996 | 47.2 mm (1.9 in) |
| 1997 | 45.5 mm (1.8 in) |
| 1998 | 87.6 mm (3.4 in) |
| 1999 | 81.3 mm (3.2 in) |
| 2000 | 45.9 mm (1.8 in) |
| 2001 | 37.4 mm (1.5 in) |
| 2002 | 54.4 mm (2.1 in) |
| 2003 | 45.9 mm (1.8 in) |
| 2004 | 39.2 mm (1.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1902 | 61 days |
| 1903 | 166 days |
| 1904 | 145 days |
| 1905 | 122 days |
| 1906 | 160 days |
| 1907 | 115 days |
| 1908 | 116 days |
| 1909 | 105 days |
| 1910 | 111 days |
| 1911 | 154 days |
| 1912 | 61 days |
| 1913 | 62 days |
| 1914 | 216 days |
| 1915 | 22 days |
| 1916 | 29 days |
| 1917 | 49 days |
| 1918 | 31 days |
| 1919 | 36 days |
| 1920 | 22 days |
| 1921 | 30 days |
| 1922 | 35 days |
| 1923 | 22 days |
| 1924 | 38 days |
| 1925 | 50 days |
| 1926 | 153 days |
| 1927 | 175 days |
| 1928 | 178 days |
| 1929 | 94 days |
| 1930 | 121 days |
| 1931 | 86 days |
| 1932 | 207 days |
| 1933 | 146 days |
| 1934 | 133 days |
| 1935 | 165 days |
| 1936 | 68 days |
| 1937 | 169 days |
| 1938 | 116 days |
| 1939 | 101 days |
| 1940 | 180 days |
| 1941 | 171 days |
| 1942 | 175 days |
| 1943 | 166 days |
| 1944 | 155 days |
| 1945 | 124 days |
| 1946 | 85 days |
| 1947 | 73 days |
| 1948 | 102 days |
| 1949 | 175 days |
| 1950 | 91 days |
| 1951 | 177 days |
| 1952 | 200 days |
| 1953 | 140 days |
| 1954 | 154 days |
| 1955 | 189 days |
| 1956 | 143 days |
| 1957 | 122 days |
| 1958 | 66 days |
| 1959 | 93 days |
| 1960 | 76 days |
| 1961 | 105 days |
| 1962 | 134 days |
| 1963 | 55 days |
| 1964 | 96 days |
| 1965 | 108 days |
| 1966 | 152 days |
| 1967 | 105 days |
| 1968 | 126 days |
| 1969 | 62 days |
| 1970 | 193 days |
| 1971 | 167 days |
| 1972 | 90 days |
| 1973 | 160 days |
| 1974 | 159 days |
| 1975 | 164 days |
| 1976 | 65 days |
| 1977 | 78 days |
| 1978 | 131 days |
| 1979 | 184 days |
| 1980 | 120 days |
| 1981 | 143 days |
| 1982 | 79 days |
| 1983 | 85 days |
| 1984 | 94 days |
| 1985 | 123 days |
| 1986 | 161 days |
| 1987 | 123 days |
| 1988 | 146 days |
| 1989 | 164 days |
| 1990 | 116 days |
| 1991 | 187 days |
| 1992 | 204 days |
| 1993 | 126 days |
| 1994 | 61 days |
| 1995 | 178 days |
| 1996 | 162 days |
| 1997 | 186 days |
| 1998 | 84 days |
| 1999 | 144 days |
| 2000 | 83 days |
| 2001 | 116 days |
| 2002 | 169 days |
| 2003 | 175 days |
| 2004 | 73 days |
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
88 years with a frostAcross 88 years with a frost, the median last spring frost at Porterville falls on 25 February and the median first autumn frost on 28 November, which leaves a median of 280 days between them.
In 1971 to 2002 the median growing season was 295 days. That is 47 days more than in 1908 to 1940.
Fitted over all years, the growing season changes by +5.4 days per decade at this station.
| Measure | Median, all years | Earliest period (1908 to 1940) | Recent period (1971 to 2002) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 25 February | 21 March | 7 February | 42 days earlier | -4.1 days per decade |
| First autumn frost | 28 November | 25 November | 28 November | 3 days later | +1.3 days per decade |
| Growing days | 280 days | 248 days | 295 days | 47 days more | +5.4 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
87 years, 1904 to 2003A day with at least 29.5 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 65.2 mm (2.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 29.5 mm (1.2 in) | |
| 5 years | 38.8 mm (1.5 in) | |
| 10 years | 45.0 mm (1.8 in) | |
| 25 years | 53.1 mm (2.1 in) | |
| 50 years | 59.1 mm (2.3 in) | |
| 100 years | 65.2 mm (2.6 in) | Longer than the 87 years of record |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 87 years of values from 1904 to 2003.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 69.1 mm (2.7 in) in 1969; 68.1 mm (2.7 in) in 1940; 59.4 mm (2.3 in) in 1966.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).