Tropic Weather Records (USC00428847)
Record envelope, standing records and threshold days for Tropic (USC00428847), Utah, United States, with 107 years of record.
Key Facts for Tropic
- Tropic (USC00428847) is a weather station in Utah, United States at 37.63 latitude and -112.08 longitude, 1,914 m (6,280 ft) above sea level.
- The station reports from 1893 to 1999, 107 years of record.
- 1,464 records set at Tropic still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Tropic tied a daily record high maximum temperature of 32.2 C (90.0 F) on 26 August 1999.
About the Station
- Location: Utah, United States, 37.63 latitude, -112.08 longitude.
- Elevation: 1,914 m (6,280 ft).
- Period of record: 1893 to 1999, 107 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 | 19.4 C (66.9 F) | -27.2 C (-17.0 F) | n/a | n/a |
| Feb | 21.7 C (71.1 F) | -32.2 C (-26.0 F) | n/a | n/a |
| Mar | 26.7 C (80.1 F) | -18.9 C (-2.0 F) | n/a | n/a |
| Apr | 28.9 C (84.0 F) | -14.4 C (6.1 F) | n/a | n/a |
| May | 35.6 C (96.1 F) | -11.1 C (12.0 F) | n/a | n/a |
| Jun | 41.1 C (106.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Jul | 38.3 C (100.9 F) | -8.3 C (17.1 F) | n/a | n/a |
| Aug | 38.3 C (100.9 F) | -5.0 C (23.0 F) | n/a | n/a |
| Sep | 37.8 C (100.0 F) | -12.2 C (10.0 F) | n/a | n/a |
| Oct | 30.0 C (86.0 F) | -12.8 C (9.0 F) | n/a | n/a |
| Nov | 25.6 C (78.1 F) | -22.8 C (-9.0 F) | n/a | n/a |
| Dec | 21.1 C (70.0 F) | -27.8 C (-18.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1893 | 19 |
| 1894 | 25 |
| 1897 | 10 |
| 1898 | 14 |
| 1899 | 22 |
| 1900 | 19 |
| 1901 | 29 |
| 1902 | 99 |
| 1903 | 25 |
| 1904 | 15 |
| 1905 | 11 |
| 1906 | 14 |
| 1907 | 13 |
| 1908 | 10 |
| 1909 | 23 |
| 1910 | 24 |
| 1911 | 12 |
| 1912 | 9 |
| 1913 | 30 |
| 1914 | 9 |
| 1915 | 11 |
| 1916 | 13 |
| 1917 | 36 |
| 1918 | 18 |
| 1919 | 1 |
| 1920 | 20 |
| 1921 | 9 |
| 1922 | 25 |
| 1923 | 17 |
| 1924 | 7 |
| 1925 | 6 |
| 1926 | 1 |
| 1927 | 7 |
| 1928 | 2 |
| 1935 | 7 |
| 1936 | 24 |
| 1937 | 47 |
| 1938 | 15 |
| 1939 | 18 |
| 1940 | 19 |
| 1941 | 27 |
| 1942 | 9 |
| 1943 | 15 |
| 1944 | 6 |
| 1945 | 8 |
| 1946 | 6 |
| 1947 | 21 |
| 1948 | 10 |
| 1949 | 19 |
| 1950 | 9 |
| 1951 | 8 |
| 1952 | 14 |
| 1953 | 16 |
| 1954 | 17 |
| 1955 | 16 |
| 1956 | 6 |
| 1957 | 12 |
| 1958 | 9 |
| 1959 | 16 |
| 1960 | 10 |
| 1961 | 10 |
| 1962 | 20 |
| 1963 | 37 |
| 1964 | 10 |
| 1965 | 11 |
| 1966 | 4 |
| 1967 | 10 |
| 1968 | 10 |
| 1969 | 6 |
| 1970 | 11 |
| 1971 | 31 |
| 1972 | 26 |
| 1973 | 6 |
| 1974 | 1 |
| 1975 | 27 |
| 1976 | 8 |
| 1977 | 9 |
| 1978 | 10 |
| 1979 | 16 |
| 1980 | 14 |
| 1981 | 9 |
| 1982 | 5 |
| 1983 | 9 |
| 1984 | 6 |
| 1985 | 10 |
| 1986 | 13 |
| 1987 | 3 |
| 1988 | 12 |
| 1989 | 14 |
| 1990 | 15 |
| 1991 | 10 |
| 1992 | 5 |
| 1993 | 1 |
| 1994 | 10 |
| 1995 | 16 |
| 1996 | 40 |
| 1997 | 7 |
| 1998 | 8 |
| 1999 | 5 |
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 1963-07-03 | Record high minimum temperature | Record high minimum temperature 24.4 C (75.9 F) |
Wettest Day of Each Month
Sep: 68.6 mm (2.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 39.1 mm (1.5 in) | 29 January 1915 |
| Feb | 45.7 mm (1.8 in) | 17 February 1917 |
| Mar | 64.3 mm (2.5 in) | 3 March 1938 |
| Apr | 30.2 mm (1.2 in) | 27 April 1900 |
| May | 23.9 mm (0.9 in) | 11 May 1947 |
| Jun | 36.3 mm (1.4 in) | 3 June 1952 |
| Jul | 48.8 mm (1.9 in) | 26 July 1906 |
| Aug | 52.8 mm (2.1 in) | 13 August 1906 |
| Sep | 68.6 mm (2.7 in) | 12 September 1927 |
| Oct | 55.1 mm (2.2 in) | 28 October 1912 |
| Nov | 39.9 mm (1.6 in) | 10 November 1902 |
| Dec | 53.6 mm (2.1 in) | 28 December 1936 |
Period of Record Coverage
1893 to 1999| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1893 | 363 | 99% | Yes |
| 1894 | 304 | 83% | No |
| 1897 | 175 | 48% | No |
| 1898 | 322 | 88% | No |
| 1899 | 300 | 82% | No |
| 1900 | 346 | 95% | Yes |
| 1901 | 316 | 87% | No |
| 1902 | 310 | 85% | No |
| 1903 | 314 | 86% | No |
| 1904 | 348 | 95% | Yes |
| 1905 | 341 | 93% | Yes |
| 1906 | 348 | 95% | Yes |
| 1907 | 329 | 90% | Yes |
| 1908 | 243 | 66% | No |
| 1909 | 337 | 92% | Yes |
| 1910 | 328 | 90% | No |
| 1911 | 272 | 75% | No |
| 1912 | 304 | 83% | No |
| 1913 | 335 | 92% | Yes |
| 1914 | 339 | 93% | Yes |
| 1915 | 349 | 96% | Yes |
| 1916 | 233 | 64% | No |
| 1917 | 220 | 60% | No |
| 1918 | 240 | 66% | No |
| 1919 | 29 | 8% | No |
| 1920 | 102 | 28% | No |
| 1921 | 90 | 25% | No |
| 1922 | 108 | 30% | No |
| 1923 | 252 | 69% | No |
| 1924 | 81 | 22% | No |
| 1925 | 194 | 53% | No |
| 1926 | 58 | 16% | No |
| 1927 | 253 | 69% | No |
| 1928 | 89 | 24% | No |
| 1935 | 272 | 75% | No |
| 1936 | 364 | 99% | Yes |
| 1937 | 322 | 88% | No |
| 1938 | 365 | 100% | Yes |
| 1939 | 364 | 100% | Yes |
| 1940 | 361 | 99% | Yes |
| 1941 | 326 | 89% | No |
| 1942 | 364 | 100% | Yes |
| 1943 | 364 | 100% | Yes |
| 1944 | 361 | 99% | Yes |
| 1945 | 364 | 100% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 212 | 58% | No |
| 1951 | 309 | 85% | No |
| 1952 | 354 | 97% | Yes |
| 1953 | 362 | 99% | Yes |
| 1954 | 359 | 98% | Yes |
| 1955 | 359 | 98% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 362 | 99% | Yes |
| 1958 | 363 | 99% | Yes |
| 1959 | 361 | 99% | Yes |
| 1960 | 363 | 99% | Yes |
| 1961 | 333 | 91% | Yes |
| 1962 | 302 | 83% | No |
| 1963 | 243 | 67% | No |
| 1964 | 239 | 65% | No |
| 1965 | 329 | 90% | Yes |
| 1966 | 196 | 54% | No |
| 1967 | 234 | 64% | No |
| 1968 | 366 | 100% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 357 | 98% | Yes |
| 1972 | 344 | 94% | Yes |
| 1973 | 364 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 363 | 99% | Yes |
| 1978 | 363 | 99% | Yes |
| 1979 | 362 | 99% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 364 | 100% | Yes |
| 1982 | 363 | 99% | Yes |
| 1983 | 362 | 99% | Yes |
| 1984 | 365 | 100% | Yes |
| 1985 | 363 | 99% | Yes |
| 1986 | 363 | 99% | Yes |
| 1987 | 362 | 99% | Yes |
| 1988 | 360 | 98% | Yes |
| 1989 | 350 | 96% | Yes |
| 1990 | 360 | 99% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 359 | 98% | Yes |
| 1993 | 363 | 99% | Yes |
| 1994 | 360 | 99% | Yes |
| 1995 | 317 | 87% | No |
| 1996 | 362 | 99% | Yes |
| 1997 | 361 | 99% | Yes |
| 1998 | 319 | 87% | No |
| 1999 | 236 | 65% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 26 August 1999 | Tropic, US | daily high max (Tie) | 32.2 C (90.0 F) | tie | 104 years | 10 of 100 (Routine) |
| 14 July 1999 | Tropic, US | daily rain | 20.8 mm (0.8 in) | 11.1 mm (0.4 in) | 32 years | 20 of 100 (Routine) |
| 27 June 1999 | Tropic, US | daily high min | 17.8 C (64.0 F) | 1.7 C (3.1 F) | 42 years | 26 of 100 (Routine) |
| 25 April 1999 | Tropic, US | daily low max (Tie) | 8.3 C (46.9 F) | tie | 105 years | 10 of 100 (Routine) |
| 24 April 1999 | Tropic, US | daily snow depth | 5.1 cm (2.0 in) | 5.1 cm (2.0 in) | 48 years | 20 of 100 (Routine) |
| 24 April 1999 | Tropic, US | daily low max | 5.6 C (42.1 F) | 0.5 C (0.9 F) | 38 years | 21 of 100 (Routine) |
| 23 April 1999 | Tropic, US | daily snow depth | 5.1 cm (2.0 in) | 5.1 cm (2.0 in) | 48 years | 20 of 100 (Routine) |
| 5 April 1999 | Tropic, US | daily snow depth | 5.1 cm (2.0 in) | 5.1 cm (2.0 in) | 48 years | 20 of 100 (Routine) |
| 4 April 1999 | Tropic, US | monthly snow depth | 15.2 cm (6.0 in) | 2.5 cm (1.0 in) | 83 years | 47 of 100 (Notable) |
| 4 April 1999 | Tropic, US | daily snowfall (Tie) | 15.2 cm (6.0 in) | tie | 98 years | 9 of 100 (Routine) |
| 29 March 1999 | Tropic, US | daily high max | 22.2 C (72.0 F) | 0.5 C (0.9 F) | 105 years | 40 of 100 (Notable) |
| 25 January 1999 | Tropic, US | daily high min (Tie) | -0.6 C (30.9 F) | tie | 88 years | 9 of 100 (Routine) |
| 7 January 1999 | Tropic, US | daily high max | 15.6 C (60.1 F) | 0.6 C (1.1 F) | 76 years | 33 of 100 (Routine) |
| 6 January 1999 | Tropic, US | daily high min | 1.1 C (34.0 F) | 1.1 C (2.0 F) | 20 years | 18 of 100 (Routine) |
| 29 November 1998 | Tropic, US | daily high min (Tie) | 0.0 C (32.0 F) | tie | 48 years | 6 of 100 (Routine) |
| 11 November 1998 | Tropic, US | daily snow depth | 7.6 cm (3.0 in) | 7.6 cm (3.0 in) | 49 years | 20 of 100 (Routine) |
| 9 November 1998 | Tropic, US | daily snow depth | 5.1 cm (2.0 in) | 5.1 cm (2.0 in) | 49 years | 20 of 100 (Routine) |
| 7 September 1998 | Tropic, US | daily high min | 15.6 C (60.1 F) | 2.8 C (5.0 F) | 17 years | 22 of 100 (Routine) |
| 5 September 1998 | Tropic, US | daily high min | 13.9 C (57.0 F) | 0.6 C (1.1 F) | 37 years | 22 of 100 (Routine) |
| 31 August 1998 | Tropic, US | daily high min (Tie) | 14.4 C (57.9 F) | tie | 28 years | 4 of 100 (Routine) |
Climate Trend
56 complete years, 1893 to 1997| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1893 | 8.2 C | -0.40 C |
| 1904 | 9.1 C | +0.48 C |
| 1906 | 9.0 C | +0.41 C |
| 1909 | 8.2 C | -0.39 C |
| 1913 | 6.9 C | -1.74 C |
| 1914 | 8.2 C | -0.47 C |
| 1915 | 7.6 C | -1.01 C |
| 1936 | 9.6 C | +1.01 C |
| 1938 | 9.2 C | +0.57 C |
| 1939 | 9.8 C | +1.17 C |
| 1940 | 9.9 C | +1.28 C |
| 1942 | 8.7 C | +0.06 C |
| 1943 | 9.4 C | +0.79 C |
| 1944 | 8.1 C | -0.51 C |
| 1945 | 8.6 C | -0.07 C |
| 1946 | 8.9 C | +0.24 C |
| 1947 | 9.4 C | +0.77 C |
| 1948 | 8.3 C | -0.34 C |
| 1949 | 8.3 C | -0.29 C |
| 1952 | 8.1 C | -0.50 C |
| 1953 | 9.3 C | +0.71 C |
| 1954 | 9.9 C | +1.23 C |
| 1955 | 8.0 C | -0.63 C |
| 1956 | 9.4 C | +0.72 C |
| 1957 | 8.6 C | 0.00 C |
| 1958 | 9.5 C | +0.91 C |
| 1959 | 9.8 C | +1.20 C |
| 1960 | 9.3 C | +0.62 C |
| 1968 | 7.6 C | -0.99 C |
| 1969 | 8.5 C | -0.15 C |
| 1970 | 8.5 C | -0.15 C |
| 1971 | 7.8 C | -0.84 C |
| 1973 | 7.3 C | -1.34 C |
| 1974 | 8.1 C | -0.55 C |
| 1975 | 6.8 C | -1.81 C |
| 1976 | 8.1 C | -0.51 C |
| 1977 | 8.7 C | +0.05 C |
| 1978 | 8.0 C | -0.61 C |
| 1979 | 7.3 C | -1.29 C |
| 1980 | 8.5 C | -0.15 C |
| 1981 | 9.4 C | +0.73 C |
| 1982 | 7.6 C | -1.04 C |
| 1983 | 8.1 C | -0.55 C |
| 1984 | 8.1 C | -0.53 C |
| 1985 | 8.4 C | -0.25 C |
| 1986 | 9.1 C | +0.50 C |
| 1987 | 8.5 C | -0.14 C |
| 1988 | 9.2 C | +0.57 C |
| 1989 | 9.2 C | +0.52 C |
| 1990 | 8.4 C | -0.24 C |
| 1991 | 8.1 C | -0.51 C |
| 1992 | 9.1 C | +0.48 C |
| 1993 | 8.4 C | -0.24 C |
| 1994 | 9.4 C | +0.75 C |
| 1996 | 10.4 C | +1.73 C |
| 1997 | 9.4 C | +0.77 C |
The fitted trend in annual mean temperature here over 1893 to 1997 is 0.01 C (-0.07 to 0.09) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.01 F (-0.13 to 0.15) per decade. The slope is a straight line fitted to 56 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.01 C (-0.07 to 0.09) per decade | 0.01 F (-0.13 to 0.15) per decade | 1893 to 1997 | 56 | Not clearly different from zero |
| Mean daily maximum | -0.01 C (-0.12 to 0.10) per decade | -0.02 F (-0.21 to 0.17) per decade | 1893 to 1997 | 56 | Not clearly different from zero |
| Mean daily minimum | 0.02 C (-0.05 to 0.10) per decade | 0.04 F (-0.10 to 0.18) per decade | 1893 to 1997 | 56 | Not clearly different from zero |
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
1893 to 1999| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.1 C (106.0 F) | 1898 | 33.9 C (93.0 F) | 99 |
| Coldest night (TNn) | -32.2 C (-26.0 F) | 1903 | -18.9 C (-2.0 F) | 99 |
| Wettest day (Rx1day) | 68.6 mm (2.7 in) | 1927 | 28.7 mm (1.1 in) | 99 |
| Wettest five days (Rx5day) | 123.8 mm (4.9 in) | 1909 | 45.5 mm (1.8 in) | 91 |
| Longest dry spell (CDD) | 123 days | 1904 | 40 days | 97 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1893 | 35.0 C (95.0 F) |
| 1894 | 38.3 C (100.9 F) |
| 1897 | 30.6 C (87.1 F) |
| 1898 | 41.1 C (106.0 F) |
| 1899 | 36.1 C (97.0 F) |
| 1900 | 36.7 C (98.1 F) |
| 1901 | 35.0 C (95.0 F) |
| 1902 | 37.2 C (99.0 F) |
| 1903 | 32.2 C (90.0 F) |
| 1904 | 33.9 C (93.0 F) |
| 1905 | 35.6 C (96.1 F) |
| 1906 | 32.8 C (91.0 F) |
| 1907 | 35.6 C (96.1 F) |
| 1908 | 34.4 C (93.9 F) |
| 1909 | 38.3 C (100.9 F) |
| 1910 | 35.6 C (96.1 F) |
| 1911 | 33.9 C (93.0 F) |
| 1912 | 32.8 C (91.0 F) |
| 1913 | 34.4 C (93.9 F) |
| 1914 | 32.8 C (91.0 F) |
| 1915 | 31.1 C (88.0 F) |
| 1916 | 33.3 C (91.9 F) |
| 1917 | 38.3 C (100.9 F) |
| 1918 | 31.1 C (88.0 F) |
| 1919 | 10.0 C (50.0 F) |
| 1920 | 31.1 C (88.0 F) |
| 1921 | 21.1 C (70.0 F) |
| 1922 | 34.4 C (93.9 F) |
| 1923 | 34.4 C (93.9 F) |
| 1924 | 21.7 C (71.1 F) |
| 1925 | 37.8 C (100.0 F) |
| 1926 | 15.6 C (60.1 F) |
| 1927 | 32.2 C (90.0 F) |
| 1928 | 20.6 C (69.1 F) |
| 1935 | 33.9 C (93.0 F) |
| 1936 | 37.8 C (100.0 F) |
| 1937 | 35.0 C (95.0 F) |
| 1938 | 36.1 C (97.0 F) |
| 1939 | 36.7 C (98.1 F) |
| 1940 | 36.1 C (97.0 F) |
| 1941 | 33.3 C (91.9 F) |
| 1942 | 33.9 C (93.0 F) |
| 1943 | 33.9 C (93.0 F) |
| 1944 | 34.4 C (93.9 F) |
| 1945 | 32.2 C (90.0 F) |
| 1946 | 33.9 C (93.0 F) |
| 1947 | 33.3 C (91.9 F) |
| 1948 | 33.9 C (93.0 F) |
| 1949 | 35.0 C (95.0 F) |
| 1950 | 35.6 C (96.1 F) |
| 1951 | 32.8 C (91.0 F) |
| 1952 | 31.7 C (89.1 F) |
| 1953 | 38.3 C (100.9 F) |
| 1954 | 37.2 C (99.0 F) |
| 1955 | 32.8 C (91.0 F) |
| 1956 | 33.3 C (91.9 F) |
| 1957 | 33.3 C (91.9 F) |
| 1958 | 33.9 C (93.0 F) |
| 1959 | 34.4 C (93.9 F) |
| 1960 | 35.6 C (96.1 F) |
| 1961 | 35.0 C (95.0 F) |
| 1962 | 32.8 C (91.0 F) |
| 1963 | 36.7 C (98.1 F) |
| 1964 | 37.8 C (100.0 F) |
| 1965 | 32.2 C (90.0 F) |
| 1966 | 32.8 C (91.0 F) |
| 1967 | 32.2 C (90.0 F) |
| 1968 | 33.9 C (93.0 F) |
| 1969 | 33.9 C (93.0 F) |
| 1970 | 35.6 C (96.1 F) |
| 1971 | 36.1 C (97.0 F) |
| 1972 | 35.6 C (96.1 F) |
| 1973 | 33.3 C (91.9 F) |
| 1974 | 34.4 C (93.9 F) |
| 1975 | 31.7 C (89.1 F) |
| 1976 | 33.9 C (93.0 F) |
| 1977 | 32.8 C (91.0 F) |
| 1978 | 33.3 C (91.9 F) |
| 1979 | 35.0 C (95.0 F) |
| 1980 | 33.3 C (91.9 F) |
| 1981 | 33.9 C (93.0 F) |
| 1982 | 32.2 C (90.0 F) |
| 1983 | 32.2 C (90.0 F) |
| 1984 | 32.8 C (91.0 F) |
| 1985 | 36.7 C (98.1 F) |
| 1986 | 32.8 C (91.0 F) |
| 1987 | 32.2 C (90.0 F) |
| 1988 | 34.4 C (93.9 F) |
| 1989 | 35.0 C (95.0 F) |
| 1990 | 34.4 C (93.9 F) |
| 1991 | 36.1 C (97.0 F) |
| 1992 | 33.9 C (93.0 F) |
| 1993 | 34.4 C (93.9 F) |
| 1994 | 35.0 C (95.0 F) |
| 1995 | 32.8 C (91.0 F) |
| 1996 | 37.2 C (99.0 F) |
| 1997 | 33.9 C (93.0 F) |
| 1998 | 35.0 C (95.0 F) |
| 1999 | 34.4 C (93.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1893 | -17.8 C (0.0 F) |
| 1894 | -26.1 C (-15.0 F) |
| 1897 | -13.9 C (7.0 F) |
| 1898 | -24.4 C (-11.9 F) |
| 1899 | -21.7 C (-7.1 F) |
| 1900 | -17.8 C (0.0 F) |
| 1901 | -24.4 C (-11.9 F) |
| 1902 | -27.2 C (-17.0 F) |
| 1903 | -32.2 C (-26.0 F) |
| 1904 | -17.2 C (1.0 F) |
| 1905 | -22.8 C (-9.0 F) |
| 1906 | -16.1 C (3.0 F) |
| 1907 | -23.3 C (-9.9 F) |
| 1908 | -16.7 C (1.9 F) |
| 1909 | -26.1 C (-15.0 F) |
| 1910 | -25.6 C (-14.1 F) |
| 1911 | -20.0 C (-4.0 F) |
| 1912 | -22.8 C (-9.0 F) |
| 1913 | -24.4 C (-11.9 F) |
| 1914 | -21.1 C (-6.0 F) |
| 1915 | -19.4 C (-2.9 F) |
| 1916 | -25.0 C (-13.0 F) |
| 1917 | -20.0 C (-4.0 F) |
| 1918 | -15.0 C (5.0 F) |
| 1919 | -17.8 C (0.0 F) |
| 1920 | -16.1 C (3.0 F) |
| 1921 | -17.2 C (1.0 F) |
| 1922 | -12.8 C (9.0 F) |
| 1923 | -21.7 C (-7.1 F) |
| 1924 | -25.6 C (-14.1 F) |
| 1925 | -18.3 C (-0.9 F) |
| 1926 | -15.0 C (5.0 F) |
| 1927 | -21.1 C (-6.0 F) |
| 1928 | -12.8 C (9.0 F) |
| 1935 | -15.6 C (3.9 F) |
| 1936 | -13.3 C (8.1 F) |
| 1937 | -26.7 C (-16.1 F) |
| 1938 | -14.4 C (6.1 F) |
| 1939 | -22.8 C (-9.0 F) |
| 1940 | -17.8 C (0.0 F) |
| 1941 | -17.2 C (1.0 F) |
| 1942 | -22.8 C (-9.0 F) |
| 1943 | -16.7 C (1.9 F) |
| 1944 | -18.9 C (-2.0 F) |
| 1945 | -18.9 C (-2.0 F) |
| 1946 | -16.1 C (3.0 F) |
| 1947 | -16.7 C (1.9 F) |
| 1948 | -22.2 C (-8.0 F) |
| 1949 | -23.3 C (-9.9 F) |
| 1950 | -22.8 C (-9.0 F) |
| 1951 | -18.3 C (-0.9 F) |
| 1952 | -18.3 C (-0.9 F) |
| 1953 | -16.7 C (1.9 F) |
| 1954 | -16.7 C (1.9 F) |
| 1955 | -20.0 C (-4.0 F) |
| 1956 | -19.4 C (-2.9 F) |
| 1957 | -18.3 C (-0.9 F) |
| 1958 | -16.1 C (3.0 F) |
| 1959 | -16.7 C (1.9 F) |
| 1960 | -23.3 C (-9.9 F) |
| 1961 | -20.0 C (-4.0 F) |
| 1962 | -17.8 C (0.0 F) |
| 1963 | -17.8 C (0.0 F) |
| 1964 | -20.6 C (-5.1 F) |
| 1965 | -16.7 C (1.9 F) |
| 1966 | -17.8 C (0.0 F) |
| 1967 | -20.6 C (-5.1 F) |
| 1968 | -18.9 C (-2.0 F) |
| 1969 | -17.8 C (0.0 F) |
| 1970 | -18.3 C (-0.9 F) |
| 1971 | -22.8 C (-9.0 F) |
| 1972 | -24.4 C (-11.9 F) |
| 1973 | -22.2 C (-8.0 F) |
| 1974 | -19.4 C (-2.9 F) |
| 1975 | -21.7 C (-7.1 F) |
| 1976 | -25.6 C (-14.1 F) |
| 1977 | -18.3 C (-0.9 F) |
| 1978 | -20.0 C (-4.0 F) |
| 1979 | -25.6 C (-14.1 F) |
| 1980 | -14.4 C (6.1 F) |
| 1981 | -13.3 C (8.1 F) |
| 1982 | -22.2 C (-8.0 F) |
| 1983 | -16.7 C (1.9 F) |
| 1984 | -19.4 C (-2.9 F) |
| 1985 | -23.3 C (-9.9 F) |
| 1986 | -15.6 C (3.9 F) |
| 1987 | -16.7 C (1.9 F) |
| 1988 | -23.9 C (-11.0 F) |
| 1989 | -23.9 C (-11.0 F) |
| 1990 | -27.8 C (-18.0 F) |
| 1991 | -19.4 C (-2.9 F) |
| 1992 | -19.4 C (-2.9 F) |
| 1993 | -23.3 C (-9.9 F) |
| 1994 | -16.1 C (3.0 F) |
| 1995 | -16.1 C (3.0 F) |
| 1996 | -18.9 C (-2.0 F) |
| 1997 | -16.7 C (1.9 F) |
| 1998 | -16.1 C (3.0 F) |
| 1999 | -12.8 C (9.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1893 | 25.4 mm (1.0 in) |
| 1894 | 25.4 mm (1.0 in) |
| 1897 | 25.4 mm (1.0 in) |
| 1898 | 33.0 mm (1.3 in) |
| 1899 | 13.0 mm (0.5 in) |
| 1900 | 59.2 mm (2.3 in) |
| 1901 | 38.1 mm (1.5 in) |
| 1902 | 39.9 mm (1.6 in) |
| 1903 | 24.1 mm (0.9 in) |
| 1904 | 20.3 mm (0.8 in) |
| 1905 | 33.0 mm (1.3 in) |
| 1906 | 52.8 mm (2.1 in) |
| 1907 | 26.2 mm (1.0 in) |
| 1908 | 21.3 mm (0.8 in) |
| 1909 | 48.8 mm (1.9 in) |
| 1910 | 22.9 mm (0.9 in) |
| 1911 | 32.0 mm (1.3 in) |
| 1912 | 55.1 mm (2.2 in) |
| 1913 | 25.4 mm (1.0 in) |
| 1914 | 41.7 mm (1.6 in) |
| 1915 | 39.1 mm (1.5 in) |
| 1916 | 23.9 mm (0.9 in) |
| 1917 | 45.7 mm (1.8 in) |
| 1918 | 15.2 mm (0.6 in) |
| 1919 | 15.2 mm (0.6 in) |
| 1920 | 19.1 mm (0.8 in) |
| 1921 | 37.1 mm (1.5 in) |
| 1922 | 17.8 mm (0.7 in) |
| 1923 | 25.4 mm (1.0 in) |
| 1924 | 14.0 mm (0.6 in) |
| 1925 | 44.5 mm (1.8 in) |
| 1926 | 8.6 mm (0.34 in) |
| 1927 | 68.6 mm (2.7 in) |
| 1928 | 10.2 mm (0.4 in) |
| 1935 | 38.6 mm (1.5 in) |
| 1936 | 53.6 mm (2.1 in) |
| 1937 | 38.4 mm (1.5 in) |
| 1938 | 64.3 mm (2.5 in) |
| 1939 | 43.9 mm (1.7 in) |
| 1940 | 31.8 mm (1.3 in) |
| 1941 | 25.4 mm (1.0 in) |
| 1942 | 13.0 mm (0.5 in) |
| 1943 | 37.8 mm (1.5 in) |
| 1944 | 25.7 mm (1.0 in) |
| 1945 | 50.0 mm (2.0 in) |
| 1946 | 24.9 mm (1.0 in) |
| 1947 | 36.6 mm (1.4 in) |
| 1948 | 35.6 mm (1.4 in) |
| 1949 | 27.7 mm (1.1 in) |
| 1950 | 13.2 mm (0.5 in) |
| 1951 | 45.7 mm (1.8 in) |
| 1952 | 36.3 mm (1.4 in) |
| 1953 | 17.8 mm (0.7 in) |
| 1954 | 37.3 mm (1.5 in) |
| 1955 | 38.1 mm (1.5 in) |
| 1956 | 14.7 mm (0.6 in) |
| 1957 | 25.4 mm (1.0 in) |
| 1958 | 26.2 mm (1.0 in) |
| 1959 | 29.7 mm (1.2 in) |
| 1960 | 44.5 mm (1.8 in) |
| 1961 | 30.2 mm (1.2 in) |
| 1962 | 35.6 mm (1.4 in) |
| 1963 | 39.9 mm (1.6 in) |
| 1964 | 18.3 mm (0.7 in) |
| 1965 | 31.8 mm (1.3 in) |
| 1966 | 17.0 mm (0.7 in) |
| 1967 | 57.2 mm (2.3 in) |
| 1968 | 19.8 mm (0.8 in) |
| 1969 | 33.8 mm (1.3 in) |
| 1970 | 30.5 mm (1.2 in) |
| 1971 | 22.4 mm (0.9 in) |
| 1972 | 34.8 mm (1.4 in) |
| 1973 | 26.4 mm (1.0 in) |
| 1974 | 25.9 mm (1.0 in) |
| 1975 | 33.3 mm (1.3 in) |
| 1976 | 35.3 mm (1.4 in) |
| 1977 | 23.4 mm (0.9 in) |
| 1978 | 30.2 mm (1.2 in) |
| 1979 | 24.6 mm (1.0 in) |
| 1980 | 34.0 mm (1.3 in) |
| 1981 | 41.7 mm (1.6 in) |
| 1982 | 36.6 mm (1.4 in) |
| 1983 | 22.4 mm (0.9 in) |
| 1984 | 23.6 mm (0.9 in) |
| 1985 | 18.8 mm (0.7 in) |
| 1986 | 28.4 mm (1.1 in) |
| 1987 | 26.9 mm (1.1 in) |
| 1988 | 16.3 mm (0.6 in) |
| 1989 | 21.1 mm (0.8 in) |
| 1990 | 28.7 mm (1.1 in) |
| 1991 | 23.6 mm (0.9 in) |
| 1992 | 29.7 mm (1.2 in) |
| 1993 | 43.2 mm (1.7 in) |
| 1994 | 24.1 mm (0.9 in) |
| 1995 | 26.7 mm (1.1 in) |
| 1996 | 15.7 mm (0.6 in) |
| 1997 | 32.5 mm (1.3 in) |
| 1998 | 35.1 mm (1.4 in) |
| 1999 | 20.8 mm (0.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1893 | 33.0 mm (1.3 in) |
| 1894 | 10.2 mm (0.4 in) |
| 1897 | 16.5 mm (0.6 in) |
| 1898 | 35.3 mm (1.4 in) |
| 1899 | 34.1 mm (1.3 in) |
| 1900 | 85.9 mm (3.4 in) |
| 1901 | 76.2 mm (3.0 in) |
| 1902 | 39.9 mm (1.6 in) |
| 1903 | 43.6 mm (1.7 in) |
| 1904 | 28.2 mm (1.1 in) |
| 1905 | 50.8 mm (2.0 in) |
| 1906 | 67.6 mm (2.7 in) |
| 1907 | 45.7 mm (1.8 in) |
| 1908 | 20.3 mm (0.8 in) |
| 1909 | 123.8 mm (4.9 in) |
| 1910 | 78.7 mm (3.1 in) |
| 1911 | 63.5 mm (2.5 in) |
| 1912 | 10.4 mm (0.4 in) |
| 1913 | 31.1 mm (1.2 in) |
| 1914 | 68.6 mm (2.7 in) |
| 1915 | 21.4 mm (0.8 in) |
| 1916 | 44.7 mm (1.8 in) |
| 1917 | 50.8 mm (2.0 in) |
| 1918 | n/a |
| 1919 | n/a |
| 1920 | n/a |
| 1921 | n/a |
| 1922 | 16.2 mm (0.6 in) |
| 1923 | 19.1 mm (0.8 in) |
| 1924 | n/a |
| 1925 | n/a |
| 1926 | n/a |
| 1927 | 68.6 mm (2.7 in) |
| 1928 | n/a |
| 1935 | 56.8 mm (2.2 in) |
| 1936 | 41.1 mm (1.6 in) |
| 1937 | 52.8 mm (2.1 in) |
| 1938 | 85.1 mm (3.4 in) |
| 1939 | 106.1 mm (4.2 in) |
| 1940 | 35.6 mm (1.4 in) |
| 1941 | 63.5 mm (2.5 in) |
| 1942 | 27.0 mm (1.1 in) |
| 1943 | 44.8 mm (1.8 in) |
| 1944 | 48.6 mm (1.9 in) |
| 1945 | 51.1 mm (2.0 in) |
| 1946 | 46.5 mm (1.8 in) |
| 1947 | 50.4 mm (2.0 in) |
| 1948 | 52.1 mm (2.1 in) |
| 1949 | 72.2 mm (2.8 in) |
| 1950 | 13.9 mm (0.5 in) |
| 1951 | 50.8 mm (2.0 in) |
| 1952 | 36.3 mm (1.4 in) |
| 1953 | 42.7 mm (1.7 in) |
| 1954 | 57.1 mm (2.2 in) |
| 1955 | 50.0 mm (2.0 in) |
| 1956 | 34.3 mm (1.4 in) |
| 1957 | 60.2 mm (2.4 in) |
| 1958 | 44.5 mm (1.8 in) |
| 1959 | 36.8 mm (1.4 in) |
| 1960 | 68.1 mm (2.7 in) |
| 1961 | 57.9 mm (2.3 in) |
| 1962 | 40.7 mm (1.6 in) |
| 1963 | 81.3 mm (3.2 in) |
| 1964 | 20.6 mm (0.8 in) |
| 1965 | 52.6 mm (2.1 in) |
| 1966 | 38.6 mm (1.5 in) |
| 1967 | 89.7 mm (3.5 in) |
| 1968 | 35.8 mm (1.4 in) |
| 1969 | 53.4 mm (2.1 in) |
| 1970 | 47.5 mm (1.9 in) |
| 1971 | 46.5 mm (1.8 in) |
| 1972 | 70.2 mm (2.8 in) |
| 1973 | 36.6 mm (1.4 in) |
| 1974 | 43.3 mm (1.7 in) |
| 1975 | 45.5 mm (1.8 in) |
| 1976 | 76.1 mm (3.0 in) |
| 1977 | 28.7 mm (1.1 in) |
| 1978 | 68.0 mm (2.7 in) |
| 1979 | 43.2 mm (1.7 in) |
| 1980 | 71.6 mm (2.8 in) |
| 1981 | 75.8 mm (3.0 in) |
| 1982 | 52.4 mm (2.1 in) |
| 1983 | 36.8 mm (1.4 in) |
| 1984 | 33.0 mm (1.3 in) |
| 1985 | 39.1 mm (1.5 in) |
| 1986 | 49.5 mm (1.9 in) |
| 1987 | 57.5 mm (2.3 in) |
| 1988 | 44.2 mm (1.7 in) |
| 1989 | 23.9 mm (0.9 in) |
| 1990 | 29.0 mm (1.1 in) |
| 1991 | 40.1 mm (1.6 in) |
| 1992 | 40.8 mm (1.6 in) |
| 1993 | 50.8 mm (2.0 in) |
| 1994 | 27.4 mm (1.1 in) |
| 1995 | 41.6 mm (1.6 in) |
| 1996 | 19.2 mm (0.8 in) |
| 1997 | 50.3 mm (2.0 in) |
| 1998 | 54.4 mm (2.1 in) |
| 1999 | 39.3 mm (1.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1893 | 56 days |
| 1894 | 91 days |
| 1897 | 17 days |
| 1898 | 79 days |
| 1899 | 56 days |
| 1900 | 58 days |
| 1901 | 67 days |
| 1902 | 58 days |
| 1903 | 51 days |
| 1904 | 123 days |
| 1905 | 50 days |
| 1906 | 59 days |
| 1907 | 69 days |
| 1908 | 45 days |
| 1909 | 101 days |
| 1910 | 26 days |
| 1911 | 25 days |
| 1912 | 24 days |
| 1913 | 13 days |
| 1914 | 3 days |
| 1915 | 26 days |
| 1916 | 49 days |
| 1917 | 28 days |
| 1918 | 1 day |
| 1919 | n/a |
| 1920 | 2 days |
| 1921 | 1 day |
| 1922 | 18 days |
| 1923 | 20 days |
| 1924 | 1 day |
| 1925 | 1 day |
| 1926 | 1 day |
| 1927 | 33 days |
| 1928 | n/a |
| 1935 | 30 days |
| 1936 | 33 days |
| 1937 | 63 days |
| 1938 | 36 days |
| 1939 | 117 days |
| 1940 | 34 days |
| 1941 | 28 days |
| 1942 | 60 days |
| 1943 | 27 days |
| 1944 | 37 days |
| 1945 | 28 days |
| 1946 | 54 days |
| 1947 | 52 days |
| 1948 | 42 days |
| 1949 | 37 days |
| 1950 | 56 days |
| 1951 | 54 days |
| 1952 | 54 days |
| 1953 | 64 days |
| 1954 | 35 days |
| 1955 | 70 days |
| 1956 | 64 days |
| 1957 | 33 days |
| 1958 | 61 days |
| 1959 | 52 days |
| 1960 | 52 days |
| 1961 | 33 days |
| 1962 | 39 days |
| 1963 | 40 days |
| 1964 | 56 days |
| 1965 | 28 days |
| 1966 | 65 days |
| 1967 | 56 days |
| 1968 | 26 days |
| 1969 | 55 days |
| 1970 | 32 days |
| 1971 | 58 days |
| 1972 | 103 days |
| 1973 | 72 days |
| 1974 | 101 days |
| 1975 | 35 days |
| 1976 | 46 days |
| 1977 | 41 days |
| 1978 | 56 days |
| 1979 | 77 days |
| 1980 | 44 days |
| 1981 | 32 days |
| 1982 | 34 days |
| 1983 | 25 days |
| 1984 | 30 days |
| 1985 | 31 days |
| 1986 | 37 days |
| 1987 | 37 days |
| 1988 | 41 days |
| 1989 | 34 days |
| 1990 | 37 days |
| 1991 | 54 days |
| 1992 | 44 days |
| 1993 | 59 days |
| 1994 | 26 days |
| 1995 | 31 days |
| 1996 | 42 days |
| 1997 | 33 days |
| 1998 | 20 days |
| 1999 | 32 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
56 years with a frostAcross 56 years with a frost, the median last spring frost at Tropic falls on 29 May and the median first autumn frost on 27 September, which leaves a median of 119 days between them.
Fitted over all years, the growing season changes by -1.7 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1959 to 1997) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 29 May | n/a | 31 May | n/a | +1.5 days per decade |
| First autumn frost | 27 September | n/a | 25 September | n/a | -0.3 days per decade |
| Growing days | 119 days | n/a | 116 days | n/a | -1.7 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
60 years, 1898 to 1998A day with at least 29.5 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 61.2 mm (2.4 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 | 38.5 mm (1.5 in) | |
| 10 years | 44.3 mm (1.7 in) | |
| 25 years | 51.3 mm (2.0 in) | |
| 50 years | 56.3 mm (2.2 in) | |
| 100 years | 61.2 mm (2.4 in) | Longer than the 60 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, 60 years of values from 1898 to 1998.
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: 64.3 mm (2.5 in) in 1938; 59.2 mm (2.3 in) in 1900; 52.8 mm (2.1 in) in 1906.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Tropic, at 1992. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1992 ran 0.5 C (0.8 F) higher than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1992 | +0.5 | +0.8 | 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).