Las Plumas Weather Records (USC00044812)
Record envelope, standing records and threshold days for Las Plumas (USC00044812), California, United States, with 55 years of record.
Key Facts for Las Plumas
- Las Plumas (USC00044812) is a weather station in California, United States at 39.68 latitude and -121.48 longitude, 156 m (512 ft) above sea level.
- The station reports from 1913 to 1967, 55 years of record.
- 1,464 records set at Las Plumas still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Las Plumas tied a daily record high minimum temperature of 21.7 C (71.1 F) on 28 September 1967.
About the Station
- Location: California, United States, 39.68 latitude, -121.48 longitude.
- Elevation: 156 m (512 ft).
- Period of record: 1913 to 1967, 55 years.
- Eligible elements: tmax, tmin, prcp.
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 | 25.0 C (77.0 F) | -7.2 C (19.0 F) | n/a | n/a |
| Feb | 30.0 C (86.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Mar | 31.1 C (88.0 F) | -1.7 C (28.9 F) | n/a | n/a |
| Apr | 36.1 C (97.0 F) | -1.7 C (28.9 F) | n/a | n/a |
| May | 40.6 C (105.1 F) | 0.0 C (32.0 F) | n/a | n/a |
| Jun | 45.0 C (113.0 F) | 5.6 C (42.1 F) | n/a | n/a |
| Jul | 46.7 C (116.1 F) | 10.0 C (50.0 F) | n/a | n/a |
| Aug | 47.8 C (118.0 F) | 9.4 C (48.9 F) | n/a | n/a |
| Sep | 44.4 C (111.9 F) | 5.0 C (41.0 F) | n/a | n/a |
| Oct | 40.6 C (105.1 F) | 1.1 C (34.0 F) | n/a | n/a |
| Nov | 32.2 C (90.0 F) | -2.8 C (27.0 F) | n/a | n/a |
| Dec | 24.4 C (75.9 F) | -6.7 C (19.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1913 | 5 |
| 1914 | 6 |
| 1915 | 22 |
| 1916 | 45 |
| 1917 | 47 |
| 1918 | 47 |
| 1919 | 39 |
| 1920 | 32 |
| 1921 | 29 |
| 1922 | 31 |
| 1923 | 32 |
| 1924 | 38 |
| 1925 | 30 |
| 1926 | 28 |
| 1927 | 30 |
| 1928 | 24 |
| 1929 | 55 |
| 1930 | 42 |
| 1931 | 31 |
| 1932 | 35 |
| 1933 | 46 |
| 1934 | 36 |
| 1935 | 25 |
| 1936 | 53 |
| 1937 | 25 |
| 1938 | 23 |
| 1939 | 46 |
| 1940 | 22 |
| 1941 | 13 |
| 1942 | 18 |
| 1943 | 21 |
| 1944 | 27 |
| 1945 | 15 |
| 1946 | 12 |
| 1947 | 25 |
| 1948 | 39 |
| 1949 | 32 |
| 1950 | 42 |
| 1951 | 19 |
| 1952 | 12 |
| 1953 | 22 |
| 1954 | 14 |
| 1955 | 25 |
| 1956 | 15 |
| 1957 | 14 |
| 1958 | 19 |
| 1959 | 22 |
| 1960 | 14 |
| 1961 | 24 |
| 1962 | 18 |
| 1963 | 17 |
| 1964 | 21 |
| 1965 | 7 |
| 1966 | 11 |
| 1967 | 22 |
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 1962-10-12 | Record daily precipitation | Record daily precipitation 239.0 mm (9.4 in) |
Wettest Day of Each Month
Oct: 239.0 mm (9.4 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 162.1 mm (6.4 in) | 21 January 1943 |
| Feb | 194.6 mm (7.7 in) | 27 February 1940 |
| Mar | 129.8 mm (5.1 in) | 30 March 1940 |
| Apr | 132.3 mm (5.2 in) | 4 April 1926 |
| May | 107.7 mm (4.2 in) | 18 May 1957 |
| Jun | 64.3 mm (2.5 in) | 16 June 1937 |
| Jul | 7.1 mm (0.28 in) | 1 July 1916 |
| Aug | 35.6 mm (1.4 in) | 11 August 1965 |
| Sep | 119.9 mm (4.7 in) | 27 September 1957 |
| Oct | 239.0 mm (9.4 in) | 12 October 1962 |
| Nov | 107.2 mm (4.2 in) | 20 November 1920 |
| Dec | 191.5 mm (7.5 in) | 10 December 1937 |
Period of Record Coverage
1913 to 1967| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1913 | 59 | 16% | No |
| 1914 | 208 | 57% | No |
| 1915 | 363 | 99% | Yes |
| 1916 | 365 | 100% | Yes |
| 1917 | 365 | 100% | Yes |
| 1918 | 355 | 97% | Yes |
| 1919 | 365 | 100% | Yes |
| 1920 | 365 | 100% | Yes |
| 1921 | 365 | 100% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 366 | 100% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 363 | 99% | Yes |
| 1928 | 366 | 100% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 364 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 363 | 99% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 364 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 365 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 364 | 100% | Yes |
| 1948 | 365 | 100% | Yes |
| 1949 | 337 | 92% | Yes |
| 1950 | 364 | 100% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 364 | 100% | Yes |
| 1958 | 362 | 99% | Yes |
| 1959 | 364 | 100% | Yes |
| 1960 | 362 | 99% | Yes |
| 1961 | 362 | 99% | Yes |
| 1962 | 364 | 100% | Yes |
| 1963 | 334 | 92% | Yes |
| 1964 | 360 | 98% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 273 | 75% | No |
| 1967 | 272 | 75% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 28 September 1967 | Las Plumas, US | daily high min (Tie) | 21.7 C (71.1 F) | tie | 4 years | 1 of 100 (Routine) |
| 27 August 1967 | Las Plumas, US | daily high min | 23.3 C (73.9 F) | 0.5 C (0.9 F) | 48 years | 20 of 100 (Routine) |
| 26 August 1967 | Las Plumas, US | daily high min | 25.6 C (78.1 F) | 1.2 C (2.2 F) | 32 years | 18 of 100 (Routine) |
| 25 August 1967 | Las Plumas, US | daily high min | 25.6 C (78.1 F) | 0.6 C (1.1 F) | 48 years | 21 of 100 (Routine) |
| 24 August 1967 | Las Plumas, US | daily high min | 25.0 C (77.0 F) | 0.6 C (1.1 F) | 48 years | 21 of 100 (Routine) |
| 23 August 1967 | Las Plumas, US | daily high min (Tie) | 23.9 C (75.0 F) | tie | 49 years | 4 of 100 (Routine) |
| 19 August 1967 | Las Plumas, US | daily high min (Tie) | 25.0 C (77.0 F) | tie | 16 years | 2 of 100 (Routine) |
| 16 August 1967 | Las Plumas, US | daily high min | 25.0 C (77.0 F) | 1.1 C (2.0 F) | 46 years | 22 of 100 (Routine) |
| 15 August 1967 | Las Plumas, US | daily high min | 23.9 C (75.0 F) | 0.6 C (1.1 F) | 46 years | 21 of 100 (Routine) |
| 30 July 1967 | Las Plumas, US | daily high min (Tie) | 23.9 C (75.0 F) | tie | 48 years | 4 of 100 (Routine) |
| 12 June 1967 | Las Plumas, US | daily rain | 11.2 mm (0.4 in) | 2.8 mm (0.11 in) | 8 years | 9 of 100 (Routine) |
| 2 June 1967 | Las Plumas, US | daily low max | 16.7 C (62.1 F) | 1.6 C (2.9 F) | 41 years | 20 of 100 (Routine) |
| 1 June 1967 | Las Plumas, US | daily rain | 31.0 mm (1.2 in) | 19.6 mm (0.8 in) | 5 years | 25 of 100 (Routine) |
| 1 June 1967 | Las Plumas, US | monthly low max | 13.3 C (55.9 F) | 0.6 C (1.1 F) | 2 years | 16 of 100 (Routine) |
| 23 May 1967 | Las Plumas, US | daily high min | 20.6 C (69.1 F) | 3.4 C (6.1 F) | 48 years | 28 of 100 (Routine) |
| 22 May 1967 | Las Plumas, US | daily high min | 20.0 C (68.0 F) | 1.1 C (2.0 F) | 20 years | 14 of 100 (Routine) |
| 8 May 1967 | Las Plumas, US | daily high min | 15.6 C (60.1 F) | 0.6 C (1.1 F) | 0 years | 6 of 100 (Routine) |
| 30 April 1967 | Las Plumas, US | monthly low min (Tie) | -1.7 C (28.9 F) | tie | 46 years | 7 of 100 (Routine) |
| 29 April 1967 | Las Plumas, US | daily low min | 2.2 C (36.0 F) | 1.1 C (2.0 F) | 24 years | 15 of 100 (Routine) |
| 28 April 1967 | Las Plumas, US | daily low min | 1.7 C (35.1 F) | 2.2 C (4.0 F) | 24 years | 18 of 100 (Routine) |
Climate Trend
49 complete years, 1915 to 1965| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1915 | 17.7 C | +0.04 C |
| 1916 | 16.5 C | -1.11 C |
| 1917 | 17.5 C | -0.14 C |
| 1918 | 18.3 C | +0.64 C |
| 1919 | 17.2 C | -0.45 C |
| 1920 | 16.4 C | -1.18 C |
| 1921 | 16.9 C | -0.75 C |
| 1922 | 16.9 C | -0.69 C |
| 1923 | 17.4 C | -0.17 C |
| 1924 | 18.7 C | +1.04 C |
| 1925 | 16.7 C | -0.89 C |
| 1926 | 18.2 C | +0.60 C |
| 1927 | 16.8 C | -0.86 C |
| 1928 | 16.6 C | -1.03 C |
| 1929 | 15.8 C | -1.82 C |
| 1930 | 16.5 C | -1.16 C |
| 1931 | 18.2 C | +0.58 C |
| 1932 | 18.2 C | +0.59 C |
| 1933 | 18.1 C | +0.47 C |
| 1934 | 19.4 C | +1.74 C |
| 1935 | 17.7 C | +0.11 C |
| 1936 | 18.8 C | +1.19 C |
| 1937 | 18.0 C | +0.38 C |
| 1938 | 18.2 C | +0.54 C |
| 1939 | 19.2 C | +1.54 C |
| 1940 | 18.8 C | +1.16 C |
| 1941 | 18.0 C | +0.34 C |
| 1942 | 17.6 C | -0.03 C |
| 1943 | 17.9 C | +0.28 C |
| 1944 | 17.5 C | -0.11 C |
| 1945 | 17.7 C | +0.13 C |
| 1946 | 17.1 C | -0.52 C |
| 1947 | 17.5 C | -0.10 C |
| 1948 | 16.5 C | -1.08 C |
| 1950 | 18.0 C | +0.43 C |
| 1951 | 17.7 C | +0.11 C |
| 1952 | 17.7 C | +0.05 C |
| 1953 | 17.5 C | -0.11 C |
| 1954 | 17.3 C | -0.27 C |
| 1955 | 17.3 C | -0.34 C |
| 1956 | 17.4 C | -0.17 C |
| 1957 | 17.3 C | -0.29 C |
| 1958 | 18.7 C | +1.06 C |
| 1959 | 18.9 C | +1.25 C |
| 1960 | 17.9 C | +0.30 C |
| 1961 | 17.7 C | +0.07 C |
| 1962 | 17.5 C | -0.14 C |
| 1964 | 17.3 C | -0.31 C |
| 1965 | 16.9 C | -0.71 C |
The fitted trend in annual mean temperature here over 1915 to 1965 is 0.1 C (-0.1 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.4) per decade. The slope is a straight line fitted to 49 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 0.4) per decade | 1915 to 1965 | 49 | Not clearly different from zero |
| Mean daily maximum | -0.1 C (-0.3 to 0.1) per decade | -0.1 F (-0.5 to 0.2) per decade | 1915 to 1965 | 49 | Not clearly different from zero |
| Mean daily minimum | 0.2 C (0.1 to 0.4) per decade | 0.4 F (0.1 to 0.7) per decade | 1915 to 1965 | 49 | 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
1913 to 1967| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 47.8 C (118.0 F) | 1933 | 42.8 C (109.0 F) | 55 |
| Coldest night (TNn) | -7.2 C (19.0 F) | 1922 | -2.2 C (28.0 F) | 55 |
| Wettest day (Rx1day) | 239.0 mm (9.4 in) | 1962 | 97.8 mm (3.9 in) | 55 |
| Wettest five days (Rx5day) | 570.4 mm (22.5 in) | 1962 | 219.6 mm (8.6 in) | 55 |
| Longest dry spell (CDD) | 162 days | 1928 | 84 days | 55 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1913 | 23.9 C (75.0 F) |
| 1914 | 41.7 C (107.1 F) |
| 1915 | 44.4 C (111.9 F) |
| 1916 | 42.2 C (108.0 F) |
| 1917 | 45.0 C (113.0 F) |
| 1918 | 44.4 C (111.9 F) |
| 1919 | 43.3 C (109.9 F) |
| 1920 | 45.0 C (113.0 F) |
| 1921 | 42.2 C (108.0 F) |
| 1922 | 43.9 C (111.0 F) |
| 1923 | 45.0 C (113.0 F) |
| 1924 | 43.3 C (109.9 F) |
| 1925 | 46.7 C (116.1 F) |
| 1926 | 43.9 C (111.0 F) |
| 1927 | 42.2 C (108.0 F) |
| 1928 | 41.1 C (106.0 F) |
| 1929 | 41.7 C (107.1 F) |
| 1930 | 41.1 C (106.0 F) |
| 1931 | 45.0 C (113.0 F) |
| 1932 | 42.8 C (109.0 F) |
| 1933 | 47.8 C (118.0 F) |
| 1934 | 45.6 C (114.1 F) |
| 1935 | 44.4 C (111.9 F) |
| 1936 | 44.4 C (111.9 F) |
| 1937 | 44.4 C (111.9 F) |
| 1938 | 46.7 C (116.1 F) |
| 1939 | 44.4 C (111.9 F) |
| 1940 | 44.4 C (111.9 F) |
| 1941 | 44.4 C (111.9 F) |
| 1942 | 45.6 C (114.1 F) |
| 1943 | 42.2 C (108.0 F) |
| 1944 | 42.8 C (109.0 F) |
| 1945 | 42.2 C (108.0 F) |
| 1946 | 41.7 C (107.1 F) |
| 1947 | 40.6 C (105.1 F) |
| 1948 | 41.7 C (107.1 F) |
| 1949 | 41.7 C (107.1 F) |
| 1950 | 44.4 C (111.9 F) |
| 1951 | 41.1 C (106.0 F) |
| 1952 | 43.3 C (109.9 F) |
| 1953 | 42.8 C (109.0 F) |
| 1954 | 41.1 C (106.0 F) |
| 1955 | 43.3 C (109.9 F) |
| 1956 | 42.2 C (108.0 F) |
| 1957 | 41.7 C (107.1 F) |
| 1958 | 41.7 C (107.1 F) |
| 1959 | 43.9 C (111.0 F) |
| 1960 | 43.9 C (111.0 F) |
| 1961 | 45.0 C (113.0 F) |
| 1962 | 40.0 C (104.0 F) |
| 1963 | 39.4 C (102.9 F) |
| 1964 | 41.1 C (106.0 F) |
| 1965 | 38.9 C (102.0 F) |
| 1966 | 42.2 C (108.0 F) |
| 1967 | 41.1 C (106.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1913 | 2.2 C (36.0 F) |
| 1914 | 0.0 C (32.0 F) |
| 1915 | -1.1 C (30.0 F) |
| 1916 | -2.2 C (28.0 F) |
| 1917 | -3.3 C (26.1 F) |
| 1918 | -2.2 C (28.0 F) |
| 1919 | -2.2 C (28.0 F) |
| 1920 | -1.1 C (30.0 F) |
| 1921 | -2.2 C (28.0 F) |
| 1922 | -7.2 C (19.0 F) |
| 1923 | -3.3 C (26.1 F) |
| 1924 | -2.2 C (28.0 F) |
| 1925 | -1.1 C (30.0 F) |
| 1926 | -2.8 C (27.0 F) |
| 1927 | -1.1 C (30.0 F) |
| 1928 | -3.9 C (25.0 F) |
| 1929 | -5.0 C (23.0 F) |
| 1930 | -4.4 C (24.1 F) |
| 1931 | -2.8 C (27.0 F) |
| 1932 | -6.7 C (19.9 F) |
| 1933 | -2.2 C (28.0 F) |
| 1934 | -1.1 C (30.0 F) |
| 1935 | -1.7 C (28.9 F) |
| 1936 | -0.6 C (30.9 F) |
| 1937 | -6.7 C (19.9 F) |
| 1938 | -2.2 C (28.0 F) |
| 1939 | -1.7 C (28.9 F) |
| 1940 | -0.6 C (30.9 F) |
| 1941 | 0.6 C (33.1 F) |
| 1942 | -1.7 C (28.9 F) |
| 1943 | -3.3 C (26.1 F) |
| 1944 | -0.6 C (30.9 F) |
| 1945 | -1.1 C (30.0 F) |
| 1946 | -1.1 C (30.0 F) |
| 1947 | -3.3 C (26.1 F) |
| 1948 | -3.3 C (26.1 F) |
| 1949 | -5.0 C (23.0 F) |
| 1950 | -3.3 C (26.1 F) |
| 1951 | -0.6 C (30.9 F) |
| 1952 | -0.6 C (30.9 F) |
| 1953 | -0.6 C (30.9 F) |
| 1954 | -2.2 C (28.0 F) |
| 1955 | -1.1 C (30.0 F) |
| 1956 | -2.2 C (28.0 F) |
| 1957 | -4.4 C (24.1 F) |
| 1958 | -1.1 C (30.0 F) |
| 1959 | -1.1 C (30.0 F) |
| 1960 | -2.2 C (28.0 F) |
| 1961 | -2.2 C (28.0 F) |
| 1962 | -3.3 C (26.1 F) |
| 1963 | -4.4 C (24.1 F) |
| 1964 | -0.6 C (30.9 F) |
| 1965 | -1.7 C (28.9 F) |
| 1966 | -1.1 C (30.0 F) |
| 1967 | -1.7 C (28.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1913 | 127.0 mm (5.0 in) |
| 1914 | 44.5 mm (1.8 in) |
| 1915 | 129.5 mm (5.1 in) |
| 1916 | 125.5 mm (4.9 in) |
| 1917 | 96.5 mm (3.8 in) |
| 1918 | 68.6 mm (2.7 in) |
| 1919 | 96.5 mm (3.8 in) |
| 1920 | 107.2 mm (4.2 in) |
| 1921 | 76.2 mm (3.0 in) |
| 1922 | 116.1 mm (4.6 in) |
| 1923 | 61.5 mm (2.4 in) |
| 1924 | 101.6 mm (4.0 in) |
| 1925 | 97.3 mm (3.8 in) |
| 1926 | 132.3 mm (5.2 in) |
| 1927 | 80.3 mm (3.2 in) |
| 1928 | 76.2 mm (3.0 in) |
| 1929 | 123.2 mm (4.9 in) |
| 1930 | 57.7 mm (2.3 in) |
| 1931 | 97.8 mm (3.9 in) |
| 1932 | 57.2 mm (2.3 in) |
| 1933 | 77.7 mm (3.1 in) |
| 1934 | 63.5 mm (2.5 in) |
| 1935 | 114.3 mm (4.5 in) |
| 1936 | 98.0 mm (3.9 in) |
| 1937 | 191.5 mm (7.5 in) |
| 1938 | 85.1 mm (3.4 in) |
| 1939 | 81.8 mm (3.2 in) |
| 1940 | 194.6 mm (7.7 in) |
| 1941 | 116.8 mm (4.6 in) |
| 1942 | 114.3 mm (4.5 in) |
| 1943 | 162.1 mm (6.4 in) |
| 1944 | 88.9 mm (3.5 in) |
| 1945 | 92.7 mm (3.6 in) |
| 1946 | 61.5 mm (2.4 in) |
| 1947 | 113.8 mm (4.5 in) |
| 1948 | 64.3 mm (2.5 in) |
| 1949 | 70.4 mm (2.8 in) |
| 1950 | 144.8 mm (5.7 in) |
| 1951 | 95.3 mm (3.8 in) |
| 1952 | 104.1 mm (4.1 in) |
| 1953 | 115.8 mm (4.6 in) |
| 1954 | 109.2 mm (4.3 in) |
| 1955 | 189.2 mm (7.4 in) |
| 1956 | 125.5 mm (4.9 in) |
| 1957 | 119.9 mm (4.7 in) |
| 1958 | 89.7 mm (3.5 in) |
| 1959 | 77.5 mm (3.1 in) |
| 1960 | 66.8 mm (2.6 in) |
| 1961 | 79.5 mm (3.1 in) |
| 1962 | 239.0 mm (9.4 in) |
| 1963 | 133.9 mm (5.3 in) |
| 1964 | 156.2 mm (6.1 in) |
| 1965 | 88.9 mm (3.5 in) |
| 1966 | 87.4 mm (3.4 in) |
| 1967 | 134.9 mm (5.3 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1913 | 233.1 mm (9.2 in) |
| 1914 | 108.0 mm (4.3 in) |
| 1915 | 198.4 mm (7.8 in) |
| 1916 | 197.0 mm (7.8 in) |
| 1917 | 257.3 mm (10.1 in) |
| 1918 | 99.8 mm (3.9 in) |
| 1919 | 193.0 mm (7.6 in) |
| 1920 | 238.0 mm (9.4 in) |
| 1921 | 215.9 mm (8.5 in) |
| 1922 | 174.0 mm (6.9 in) |
| 1923 | 111.8 mm (4.4 in) |
| 1924 | 175.0 mm (6.9 in) |
| 1925 | 213.4 mm (8.4 in) |
| 1926 | 269.5 mm (10.6 in) |
| 1927 | 202.4 mm (8.0 in) |
| 1928 | 247.9 mm (9.8 in) |
| 1929 | 324.6 mm (12.8 in) |
| 1930 | 107.2 mm (4.2 in) |
| 1931 | 262.7 mm (10.3 in) |
| 1932 | 148.7 mm (5.9 in) |
| 1933 | 144.7 mm (5.7 in) |
| 1934 | 190.9 mm (7.5 in) |
| 1935 | 155.7 mm (6.1 in) |
| 1936 | 239.8 mm (9.4 in) |
| 1937 | 327.9 mm (12.9 in) |
| 1938 | 231.2 mm (9.1 in) |
| 1939 | 130.8 mm (5.1 in) |
| 1940 | 383.6 mm (15.1 in) |
| 1941 | 262.1 mm (10.3 in) |
| 1942 | 269.5 mm (10.6 in) |
| 1943 | 296.7 mm (11.7 in) |
| 1944 | 162.5 mm (6.4 in) |
| 1945 | 233.9 mm (9.2 in) |
| 1946 | 140.6 mm (5.5 in) |
| 1947 | 160.8 mm (6.3 in) |
| 1948 | 121.7 mm (4.8 in) |
| 1949 | 161.9 mm (6.4 in) |
| 1950 | 258.1 mm (10.2 in) |
| 1951 | 219.6 mm (8.6 in) |
| 1952 | 245.6 mm (9.7 in) |
| 1953 | 248.9 mm (9.8 in) |
| 1954 | 220.0 mm (8.7 in) |
| 1955 | 436.6 mm (17.2 in) |
| 1956 | 287.1 mm (11.3 in) |
| 1957 | 225.3 mm (8.9 in) |
| 1958 | 189.2 mm (7.4 in) |
| 1959 | 200.8 mm (7.9 in) |
| 1960 | 170.2 mm (6.7 in) |
| 1961 | 188.7 mm (7.4 in) |
| 1962 | 570.4 mm (22.5 in) |
| 1963 | 244.4 mm (9.6 in) |
| 1964 | 425.9 mm (16.8 in) |
| 1965 | 315.7 mm (12.4 in) |
| 1966 | 165.9 mm (6.5 in) |
| 1967 | 288.3 mm (11.4 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1913 | 3 days |
| 1914 | 93 days |
| 1915 | 52 days |
| 1916 | 30 days |
| 1917 | 22 days |
| 1918 | 17 days |
| 1919 | 21 days |
| 1920 | 21 days |
| 1921 | 36 days |
| 1922 | 24 days |
| 1923 | 32 days |
| 1924 | 61 days |
| 1925 | 25 days |
| 1926 | 147 days |
| 1927 | 139 days |
| 1928 | 162 days |
| 1929 | 110 days |
| 1930 | 116 days |
| 1931 | 94 days |
| 1932 | 152 days |
| 1933 | 74 days |
| 1934 | 88 days |
| 1935 | 108 days |
| 1936 | 58 days |
| 1937 | 107 days |
| 1938 | 121 days |
| 1939 | 86 days |
| 1940 | 34 days |
| 1941 | 69 days |
| 1942 | 101 days |
| 1943 | 90 days |
| 1944 | 115 days |
| 1945 | 124 days |
| 1946 | 59 days |
| 1947 | 73 days |
| 1948 | 102 days |
| 1949 | 59 days |
| 1950 | 96 days |
| 1951 | 141 days |
| 1952 | 73 days |
| 1953 | 83 days |
| 1954 | 73 days |
| 1955 | 92 days |
| 1956 | 89 days |
| 1957 | 109 days |
| 1958 | 45 days |
| 1959 | 84 days |
| 1960 | 100 days |
| 1961 | 106 days |
| 1962 | 54 days |
| 1963 | 80 days |
| 1964 | 75 days |
| 1965 | 54 days |
| 1966 | 152 days |
| 1967 | 97 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
32 years with a frostAcross 32 years with a frost, the median last spring frost at Las Plumas falls on 17 February and the median first autumn frost on 11 December, which leaves a median of 298 days between them.
Fitted over all years, the growing season changes by +7.2 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1919 to 1965) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 17 February | n/a | 19 February | n/a | -5.9 days per decade |
| First autumn frost | 11 December | n/a | 11 December | n/a | +1.3 days per decade |
| Growing days | 298 days | n/a | 298 days | n/a | +7.2 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
39 years, 1926 to 1965A day with at least 100.0 mm (3.9 in) of rain is expected about once in 2 years. A day with at least 265.2 mm (10.4 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 100.0 mm (3.9 in) | |
| 5 years | 137.2 mm (5.4 in) | |
| 10 years | 164.4 mm (6.5 in) | |
| 25 years | 202.1 mm (8.0 in) | |
| 50 years | 232.6 mm (9.2 in) | Longer than the 39 years of record |
| 100 years | 265.2 mm (10.4 in) | Longer than the 39 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, 39 years of values from 1926 to 1965.
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: 239.0 mm (9.4 in) in 1962; 194.6 mm (7.7 in) in 1940; 191.5 mm (7.5 in) in 1937.
Station Changes
3 suspected3 changes were suspected in the annual mean temperature of Las Plumas, at 1932, 1944 and 1960. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1932 ran 1.1 C (2.0 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1944 ran 0.4 C (0.7 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1960 ran 0.3 C (0.6 F) lower than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1932 | +1.1 | +2.0 | likely | 5 |
| 1944 | -0.4 | -0.7 | likely | 5 |
| 1960 | -0.3 | -0.6 | possible | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
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).