Jerome Weather Records (USC00104670)
Record envelope, standing records and threshold days for Jerome (USC00104670), Idaho, United States, with 112 years of record.
Key Facts for Jerome
- Jerome (USC00104670) is a weather station in Idaho, United States at 42.73 latitude and -114.52 longitude, 1,140 m (3,740 ft) above sea level.
- The station reports from 1915 to 2026, 112 years of record.
- 1,464 records set at Jerome still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Jerome set a daily record high minimum temperature of 18.3 C (64.9 F) on 27 August 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Idaho, United States, 42.73 latitude, -114.52 longitude.
- Elevation: 1,140 m (3,740 ft).
- Period of record: 1915 to 2026, 112 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
2 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 16.1 C (61.0 F) | -31.7 C (-25.1 F) | 11.1 C (52.0 F) | -10.6 C (12.9 F) |
| Feb | 20.6 C (69.1 F) | -31.1 C (-24.0 F) | 16.1 C (61.0 F) | -7.8 C (18.0 F) |
| Mar | 26.7 C (80.1 F) | -18.3 C (-0.9 F) | 25.6 C (78.1 F) | -5.0 C (23.0 F) |
| Apr | 32.8 C (91.0 F) | -11.1 C (12.0 F) | 25.6 C (78.1 F) | -5.0 C (23.0 F) |
| May | 39.4 C (102.9 F) | -7.2 C (19.0 F) | 30.0 C (86.0 F) | 1.1 C (34.0 F) |
| Jun | 43.3 C (109.9 F) | -5.6 C (21.9 F) | 33.3 C (91.9 F) | 3.9 C (39.0 F) |
| Jul | 43.3 C (109.9 F) | 1.7 C (35.1 F) | 37.8 C (100.0 F) | 12.2 C (54.0 F) |
| Aug | 41.7 C (107.1 F) | 0.0 C (32.0 F) | 37.2 C (99.0 F) | 7.2 C (45.0 F) |
| Sep | 38.9 C (102.0 F) | -6.1 C (21.0 F) | n/a | n/a |
| Oct | 34.4 C (93.9 F) | -11.7 C (10.9 F) | n/a | n/a |
| Nov | 25.6 C (78.1 F) | -23.3 C (-9.9 F) | n/a | n/a |
| Dec | 19.4 C (66.9 F) | -31.1 C (-24.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1915 | 5 |
| 1916 | 30 |
| 1917 | 41 |
| 1918 | 21 |
| 1919 | 17 |
| 1920 | 15 |
| 1921 | 12 |
| 1922 | 21 |
| 1923 | 2 |
| 1924 | 19 |
| 1925 | 3 |
| 1926 | 22 |
| 1927 | 20 |
| 1928 | 21 |
| 1929 | 14 |
| 1930 | 14 |
| 1931 | 9 |
| 1932 | 17 |
| 1933 | 18 |
| 1934 | 36 |
| 1935 | 15 |
| 1936 | 23 |
| 1937 | 13 |
| 1938 | 8 |
| 1939 | 16 |
| 1940 | 16 |
| 1941 | 2 |
| 1942 | 16 |
| 1943 | 8 |
| 1944 | 6 |
| 1945 | 6 |
| 1946 | 6 |
| 1947 | 3 |
| 1948 | 15 |
| 1949 | 26 |
| 1950 | 22 |
| 1951 | 7 |
| 1952 | 5 |
| 1953 | 20 |
| 1954 | 22 |
| 1955 | 17 |
| 1956 | 3 |
| 1957 | 4 |
| 1958 | 12 |
| 1959 | 8 |
| 1960 | 8 |
| 1961 | 14 |
| 1962 | 14 |
| 1963 | 12 |
| 1964 | 12 |
| 1965 | 21 |
| 1966 | 14 |
| 1967 | 9 |
| 1968 | 14 |
| 1969 | 19 |
| 1970 | 8 |
| 1971 | 11 |
| 1972 | 17 |
| 1973 | 11 |
| 1974 | 14 |
| 1975 | 13 |
| 1976 | 7 |
| 1977 | 13 |
| 1978 | 7 |
| 1979 | 5 |
| 1980 | 12 |
| 1981 | 10 |
| 1982 | 10 |
| 1983 | 10 |
| 1984 | 6 |
| 1985 | 23 |
| 1986 | 15 |
| 1987 | 10 |
| 1988 | 11 |
| 1989 | 8 |
| 1990 | 24 |
| 1991 | 4 |
| 1992 | 23 |
| 1993 | 14 |
| 1994 | 7 |
| 1995 | 9 |
| 1996 | 15 |
| 1997 | 4 |
| 1998 | 5 |
| 1999 | 7 |
| 2000 | 10 |
| 2001 | 11 |
| 2002 | 9 |
| 2003 | 21 |
| 2004 | 7 |
| 2005 | 6 |
| 2006 | 7 |
| 2007 | 14 |
| 2008 | 13 |
| 2009 | 5 |
| 2010 | 10 |
| 2011 | 2 |
| 2012 | 14 |
| 2013 | 8 |
| 2014 | 11 |
| 2015 | 36 |
| 2016 | 12 |
| 2017 | 17 |
| 2018 | 3 |
| 2020 | 8 |
| 2021 | 21 |
| 2022 | 39 |
| 2023 | 13 |
| 2024 | 15 |
| 2025 | 16 |
| 2026 | 10 |
All-Time Record Progression
5 new records| Date | Kind | Detail |
|---|---|---|
| 1961-09-09 | Record daily precipitation | Record daily precipitation 42.2 mm (1.7 in) |
| 1963-01-12 | Record low maximum temperature | Record low maximum temperature -16.7 C (1.9 F) |
| 1990-12-22 | Record low maximum temperature | Record low maximum temperature -19.4 C (-2.9 F) |
| 2021-06-14 | Record high minimum temperature | Record high minimum temperature 25.0 C (77.0 F) |
| 2022-01-04 | Record daily precipitation | Record daily precipitation 50.8 mm (2.0 in) |
Wettest Day of Each Month
Jan: 50.8 mm (2.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 50.8 mm (2.0 in) | 4 January 2022 |
| Feb | 33.3 mm (1.3 in) | 18 February 1986 |
| Mar | 25.7 mm (1.0 in) | 21 March 1973 |
| Apr | 41.4 mm (1.6 in) | 21 April 1981 |
| May | 32.0 mm (1.3 in) | 9 May 2003 |
| Jun | 31.2 mm (1.2 in) | 2 June 1961 |
| Jul | 17.8 mm (0.7 in) | 5 July 1939 |
| Aug | 39.4 mm (1.6 in) | 6 August 2014 |
| Sep | 42.2 mm (1.7 in) | 9 September 1961 |
| Oct | 31.0 mm (1.2 in) | 25 October 2010 |
| Nov | 36.3 mm (1.4 in) | 29 November 2001 |
| Dec | 39.9 mm (1.6 in) | 31 December 2005 |
Period of Record Coverage
1915 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1915 | 110 | 30% | No |
| 1916 | 365 | 100% | Yes |
| 1917 | 179 | 49% | No |
| 1918 | 350 | 96% | Yes |
| 1919 | 349 | 96% | Yes |
| 1920 | 350 | 96% | Yes |
| 1921 | 335 | 92% | Yes |
| 1922 | 345 | 95% | Yes |
| 1923 | 350 | 96% | Yes |
| 1924 | 366 | 100% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 309 | 84% | No |
| 1929 | 329 | 90% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 357 | 98% | Yes |
| 1932 | 361 | 99% | Yes |
| 1933 | 364 | 100% | Yes |
| 1934 | 344 | 94% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 332 | 91% | Yes |
| 1937 | 318 | 87% | No |
| 1938 | 355 | 97% | Yes |
| 1939 | 364 | 100% | Yes |
| 1940 | 364 | 99% | Yes |
| 1941 | 353 | 97% | Yes |
| 1942 | 361 | 99% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 364 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 364 | 100% | Yes |
| 1948 | 364 | 99% | Yes |
| 1949 | 352 | 96% | Yes |
| 1950 | 325 | 89% | No |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 361 | 99% | Yes |
| 1954 | 359 | 98% | Yes |
| 1955 | 349 | 96% | Yes |
| 1956 | 362 | 99% | Yes |
| 1957 | 357 | 98% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 362 | 99% | Yes |
| 1965 | 363 | 99% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 363 | 99% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 365 | 100% | Yes |
| 1973 | 364 | 100% | Yes |
| 1974 | 364 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 364 | 99% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 365 | 100% | Yes |
| 1981 | 363 | 99% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 365 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 335 | 92% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 363 | 99% | Yes |
| 1990 | 363 | 99% | Yes |
| 1991 | 363 | 99% | Yes |
| 1992 | 364 | 99% | Yes |
| 1993 | 364 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 365 | 100% | Yes |
| 1997 | 363 | 99% | Yes |
| 1998 | 362 | 99% | Yes |
| 1999 | 363 | 99% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 364 | 100% | Yes |
| 2002 | 363 | 99% | Yes |
| 2003 | 363 | 99% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 334 | 92% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 365 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 364 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 359 | 98% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 365 | 100% | Yes |
| 2017 | 297 | 81% | No |
| 2018 | 139 | 38% | No |
| 2019 | 92 | 25% | No |
| 2020 | 230 | 63% | No |
| 2021 | 274 | 75% | No |
| 2022 | 306 | 84% | No |
| 2023 | 343 | 94% | Yes |
| 2024 | 319 | 87% | No |
| 2025 | 365 | 100% | Yes |
| 2026 | 243 | 67% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 27 August 2026 | Jerome, US | daily high min (Provisional) | 18.3 C (64.9 F) | 1.1 C (2.0 F) | 11 years | 16 of 100 (Routine) |
| 21 August 2026 | Jerome, US | daily high min (Tie, Provisional) | 17.8 C (64.0 F) | tie | 59 years | 6 of 100 (Routine) |
| 25 July 2026 | Jerome, US | daily high min | 22.2 C (72.0 F) | 0.5 C (0.9 F) | 95 years | 39 of 100 (Notable) |
| 17 July 2026 | Jerome, US | monthly high min (Tie) | 23.3 C (73.9 F) | tie | 4 years | 5 of 100 (Routine) |
| 13 July 2026 | Jerome, US | daily high min | 21.7 C (71.1 F) | 1.7 C (3.1 F) | 24 years | 22 of 100 (Routine) |
| 28 June 2026 | Jerome, US | daily low max | 17.2 C (63.0 F) | 1.1 C (2.0 F) | 84 years | 36 of 100 (Notable) |
| 28 June 2026 | Jerome, US | daily rain | 6.4 mm (0.25 in) | 2.6 mm (0.10 in) | 43 years | 20 of 100 (Routine) |
| 17 May 2026 | Jerome, US | daily low max | 11.7 C (53.1 F) | 0.5 C (0.9 F) | 45 years | 23 of 100 (Routine) |
| 21 April 2026 | Jerome, US | daily high min (Tie) | 9.4 C (48.9 F) | tie | 84 years | 8 of 100 (Routine) |
| 30 March 2026 | Jerome, US | daily high min | 7.2 C (45.0 F) | 0.5 C (0.9 F) | 85 years | 36 of 100 (Notable) |
| 25 March 2026 | Jerome, US | daily high min | 7.2 C (45.0 F) | 0.5 C (0.9 F) | 85 years | 36 of 100 (Notable) |
| 24 March 2026 | Jerome, US | daily high min (Tie) | 7.2 C (45.0 F) | tie | 28 years | 4 of 100 (Routine) |
| 21 March 2026 | Jerome, US | daily high min | 8.3 C (46.9 F) | 1.1 C (2.0 F) | 8 years | 14 of 100 (Routine) |
| 20 March 2026 | Jerome, US | daily high max | 25.6 C (78.1 F) | 0.6 C (1.1 F) | 28 years | 19 of 100 (Routine) |
| 19 March 2026 | Jerome, US | daily high max | 23.9 C (75.0 F) | 0.6 C (1.1 F) | 21 years | 17 of 100 (Routine) |
| 18 March 2026 | Jerome, US | daily high min (Tie) | 6.1 C (43.0 F) | tie | 11 years | 3 of 100 (Routine) |
| 13 March 2026 | Jerome, US | daily high min (Tie) | 5.0 C (41.0 F) | tie | 53 years | 6 of 100 (Routine) |
| 3 March 2026 | Jerome, US | daily high min | 4.4 C (39.9 F) | 0.5 C (0.9 F) | 0 years | 11 of 100 (Routine) |
| 2 March 2026 | Jerome, US | daily high min (Tie) | 4.4 C (39.9 F) | tie | 43 years | 5 of 100 (Routine) |
| 25 February 2026 | Jerome, US | daily rain | 17.8 mm (0.7 in) | 12.0 mm (0.5 in) | 39 years | 20 of 100 (Routine) |
Climate Trend
83 complete years, 1916 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1916 | 8.3 C | -1.50 C |
| 1918 | 9.8 C | +0.06 C |
| 1920 | 9.5 C | -0.29 C |
| 1924 | 9.7 C | -0.06 C |
| 1925 | 10.4 C | +0.69 C |
| 1926 | 11.0 C | +1.25 C |
| 1927 | 9.9 C | +0.16 C |
| 1930 | 9.7 C | -0.05 C |
| 1931 | 10.3 C | +0.54 C |
| 1932 | 8.8 C | -0.97 C |
| 1933 | 9.8 C | +0.07 C |
| 1935 | 9.6 C | -0.12 C |
| 1938 | 10.5 C | +0.79 C |
| 1939 | 10.6 C | +0.88 C |
| 1940 | 11.1 C | +1.31 C |
| 1942 | 9.4 C | -0.37 C |
| 1943 | 9.9 C | +0.17 C |
| 1944 | 9.1 C | -0.62 C |
| 1945 | 9.1 C | -0.61 C |
| 1947 | 10.0 C | +0.21 C |
| 1948 | 8.1 C | -1.66 C |
| 1949 | 8.7 C | -1.08 C |
| 1951 | 8.9 C | -0.85 C |
| 1952 | 8.9 C | -0.82 C |
| 1953 | 10.2 C | +0.47 C |
| 1954 | 9.9 C | +0.19 C |
| 1955 | 8.7 C | -1.03 C |
| 1956 | 9.6 C | -0.13 C |
| 1957 | 9.8 C | +0.05 C |
| 1958 | 11.0 C | +1.28 C |
| 1959 | 10.1 C | +0.30 C |
| 1960 | 9.9 C | +0.11 C |
| 1961 | 10.5 C | +0.79 C |
| 1962 | 9.3 C | -0.43 C |
| 1963 | 10.0 C | +0.20 C |
| 1964 | 8.4 C | -1.31 C |
| 1965 | 9.9 C | +0.19 C |
| 1966 | 10.7 C | +0.94 C |
| 1967 | 10.7 C | +0.99 C |
| 1968 | 10.0 C | +0.29 C |
| 1969 | 10.2 C | +0.42 C |
| 1970 | 10.1 C | +0.35 C |
| 1971 | 9.7 C | -0.01 C |
| 1972 | 9.9 C | +0.13 C |
| 1973 | 10.5 C | +0.76 C |
| 1974 | 10.6 C | +0.85 C |
| 1975 | 8.7 C | -1.01 C |
| 1976 | 9.1 C | -0.64 C |
| 1977 | 9.8 C | +0.03 C |
| 1978 | 9.2 C | -0.53 C |
| 1979 | 9.2 C | -0.55 C |
| 1980 | 9.8 C | 0.00 C |
| 1981 | 10.4 C | +0.65 C |
| 1982 | 8.1 C | -1.67 C |
| 1983 | 9.4 C | -0.32 C |
| 1984 | 7.7 C | -2.10 C |
| 1985 | 7.1 C | -2.61 C |
| 1986 | 10.2 C | +0.47 C |
| 1988 | 10.0 C | +0.28 C |
| 1989 | 9.1 C | -0.66 C |
| 1990 | 9.8 C | +0.09 C |
| 1991 | 9.7 C | -0.07 C |
| 1992 | 10.6 C | +0.86 C |
| 1993 | 7.6 C | -2.11 C |
| 1994 | 9.9 C | +0.19 C |
| 1995 | 10.0 C | +0.21 C |
| 1996 | 9.9 C | +0.19 C |
| 1997 | 10.1 C | +0.38 C |
| 1999 | 9.7 C | -0.06 C |
| 2004 | 9.9 C | +0.15 C |
| 2005 | 10.0 C | +0.27 C |
| 2007 | 10.8 C | +1.08 C |
| 2008 | 9.5 C | -0.27 C |
| 2009 | 9.4 C | -0.35 C |
| 2010 | 9.6 C | -0.12 C |
| 2011 | 9.2 C | -0.59 C |
| 2012 | 11.2 C | +1.46 C |
| 2013 | 9.7 C | -0.05 C |
| 2014 | 10.8 C | +1.07 C |
| 2015 | 11.3 C | +1.53 C |
| 2016 | 10.7 C | +0.90 C |
| 2023 | 9.8 C | +0.08 C |
| 2025 | 11.2 C | +1.49 C |
The fitted trend in annual mean temperature here over 1916 to 2025 is 0.04 C (-0.03 to 0.10) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.2) per decade. The slope is a straight line fitted to 83 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.04 C (-0.03 to 0.10) per decade | 0.1 F (-0.1 to 0.2) per decade | 1916 to 2025 | 83 | Not clearly different from zero |
| Mean daily maximum | -0.03 C (-0.10 to 0.05) per decade | -0.05 F (-0.17 to 0.08) per decade | 1916 to 2025 | 83 | Not clearly different from zero |
| Mean daily minimum | 0.10 C (0.02 to 0.17) per decade | 0.17 F (0.03 to 0.31) per decade | 1916 to 2025 | 83 | 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
1915 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 43.3 C (109.9 F) | 1940 | 38.9 C (102.0 F) | 112 |
| Coldest night (TNn) | -31.7 C (-25.1 F) | 1937 | -20.6 C (-5.1 F) | 112 |
| Wettest day (Rx1day) | 50.8 mm (2.0 in) | 2022 | 19.5 mm (0.8 in) | 112 |
| Wettest five days (Rx5day) | 78.8 mm (3.1 in) | 1964 | 32.7 mm (1.3 in) | 112 |
| Longest dry spell (CDD) | 131 days | 2022 | 52 days | 112 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1915 | 30.6 C (87.1 F) |
| 1916 | 37.2 C (99.0 F) |
| 1917 | 22.8 C (73.0 F) |
| 1918 | 36.1 C (97.0 F) |
| 1919 | 38.9 C (102.0 F) |
| 1920 | 37.2 C (99.0 F) |
| 1921 | 35.6 C (96.1 F) |
| 1922 | 36.7 C (98.1 F) |
| 1923 | 36.7 C (98.1 F) |
| 1924 | 40.6 C (105.1 F) |
| 1925 | 40.6 C (105.1 F) |
| 1926 | 40.6 C (105.1 F) |
| 1927 | 37.2 C (99.0 F) |
| 1928 | 40.0 C (104.0 F) |
| 1929 | 40.6 C (105.1 F) |
| 1930 | 40.0 C (104.0 F) |
| 1931 | 41.1 C (106.0 F) |
| 1932 | 38.3 C (100.9 F) |
| 1933 | 40.0 C (104.0 F) |
| 1934 | 42.2 C (108.0 F) |
| 1935 | 40.6 C (105.1 F) |
| 1936 | 40.6 C (105.1 F) |
| 1937 | 38.9 C (102.0 F) |
| 1938 | 37.2 C (99.0 F) |
| 1939 | 40.0 C (104.0 F) |
| 1940 | 43.3 C (109.9 F) |
| 1941 | 38.3 C (100.9 F) |
| 1942 | 38.9 C (102.0 F) |
| 1943 | 38.3 C (100.9 F) |
| 1944 | 36.7 C (98.1 F) |
| 1945 | 37.2 C (99.0 F) |
| 1946 | 38.9 C (102.0 F) |
| 1947 | 39.4 C (102.9 F) |
| 1948 | 37.8 C (100.0 F) |
| 1949 | 38.9 C (102.0 F) |
| 1950 | 38.3 C (100.9 F) |
| 1951 | 37.8 C (100.0 F) |
| 1952 | 37.2 C (99.0 F) |
| 1953 | 37.8 C (100.0 F) |
| 1954 | 38.3 C (100.9 F) |
| 1955 | 40.0 C (104.0 F) |
| 1956 | 38.3 C (100.9 F) |
| 1957 | 37.8 C (100.0 F) |
| 1958 | 38.9 C (102.0 F) |
| 1959 | 38.9 C (102.0 F) |
| 1960 | 39.4 C (102.9 F) |
| 1961 | 40.0 C (104.0 F) |
| 1962 | 37.8 C (100.0 F) |
| 1963 | 36.7 C (98.1 F) |
| 1964 | 37.2 C (99.0 F) |
| 1965 | 37.2 C (99.0 F) |
| 1966 | 38.9 C (102.0 F) |
| 1967 | 38.9 C (102.0 F) |
| 1968 | 39.4 C (102.9 F) |
| 1969 | 40.6 C (105.1 F) |
| 1970 | 38.3 C (100.9 F) |
| 1971 | 38.9 C (102.0 F) |
| 1972 | 39.4 C (102.9 F) |
| 1973 | 42.2 C (108.0 F) |
| 1974 | 38.9 C (102.0 F) |
| 1975 | 40.0 C (104.0 F) |
| 1976 | 40.0 C (104.0 F) |
| 1977 | 38.9 C (102.0 F) |
| 1978 | 39.4 C (102.9 F) |
| 1979 | 41.1 C (106.0 F) |
| 1980 | 40.0 C (104.0 F) |
| 1981 | 38.9 C (102.0 F) |
| 1982 | 37.2 C (99.0 F) |
| 1983 | 40.6 C (105.1 F) |
| 1984 | 37.8 C (100.0 F) |
| 1985 | 39.4 C (102.9 F) |
| 1986 | 38.3 C (100.9 F) |
| 1987 | 39.4 C (102.9 F) |
| 1988 | 40.6 C (105.1 F) |
| 1989 | 39.4 C (102.9 F) |
| 1990 | 41.1 C (106.0 F) |
| 1991 | 39.4 C (102.9 F) |
| 1992 | 40.0 C (104.0 F) |
| 1993 | 36.1 C (97.0 F) |
| 1994 | 40.6 C (105.1 F) |
| 1995 | 39.4 C (102.9 F) |
| 1996 | 40.6 C (105.1 F) |
| 1997 | 38.9 C (102.0 F) |
| 1998 | 41.7 C (107.1 F) |
| 1999 | 38.9 C (102.0 F) |
| 2000 | 40.0 C (104.0 F) |
| 2001 | 41.1 C (106.0 F) |
| 2002 | 42.8 C (109.0 F) |
| 2003 | 43.3 C (109.9 F) |
| 2004 | 38.9 C (102.0 F) |
| 2005 | 41.1 C (106.0 F) |
| 2006 | 40.6 C (105.1 F) |
| 2007 | 42.2 C (108.0 F) |
| 2008 | 40.6 C (105.1 F) |
| 2009 | 40.6 C (105.1 F) |
| 2010 | 38.3 C (100.9 F) |
| 2011 | 37.8 C (100.0 F) |
| 2012 | 40.0 C (104.0 F) |
| 2013 | 41.1 C (106.0 F) |
| 2014 | 40.6 C (105.1 F) |
| 2015 | 41.7 C (107.1 F) |
| 2016 | 37.8 C (100.0 F) |
| 2017 | 37.2 C (99.0 F) |
| 2018 | 40.0 C (104.0 F) |
| 2019 | 26.1 C (79.0 F) |
| 2020 | 38.3 C (100.9 F) |
| 2021 | 38.9 C (102.0 F) |
| 2022 | 38.3 C (100.9 F) |
| 2023 | 37.8 C (100.0 F) |
| 2024 | 38.3 C (100.9 F) |
| 2025 | 37.2 C (99.0 F) |
| 2026 | 37.8 C (100.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1915 | -25.6 C (-14.1 F) |
| 1916 | -23.3 C (-9.9 F) |
| 1917 | -28.3 C (-18.9 F) |
| 1918 | -16.1 C (3.0 F) |
| 1919 | -24.4 C (-11.9 F) |
| 1920 | -17.8 C (0.0 F) |
| 1921 | -17.8 C (0.0 F) |
| 1922 | -30.6 C (-23.1 F) |
| 1923 | -21.1 C (-6.0 F) |
| 1924 | -28.3 C (-18.9 F) |
| 1925 | -17.8 C (0.0 F) |
| 1926 | -21.1 C (-6.0 F) |
| 1927 | -23.9 C (-11.0 F) |
| 1928 | -20.6 C (-5.1 F) |
| 1929 | -23.3 C (-9.9 F) |
| 1930 | -27.8 C (-18.0 F) |
| 1931 | -22.2 C (-8.0 F) |
| 1932 | -25.6 C (-14.1 F) |
| 1933 | -31.1 C (-24.0 F) |
| 1934 | -11.7 C (10.9 F) |
| 1935 | -21.7 C (-7.1 F) |
| 1936 | -22.8 C (-9.0 F) |
| 1937 | -31.7 C (-25.1 F) |
| 1938 | -13.3 C (8.1 F) |
| 1939 | -16.7 C (1.9 F) |
| 1940 | -15.0 C (5.0 F) |
| 1941 | -16.7 C (1.9 F) |
| 1942 | -22.2 C (-8.0 F) |
| 1943 | -21.1 C (-6.0 F) |
| 1944 | -17.8 C (0.0 F) |
| 1945 | -19.4 C (-2.9 F) |
| 1946 | -18.3 C (-0.9 F) |
| 1947 | -20.0 C (-4.0 F) |
| 1948 | -21.7 C (-7.1 F) |
| 1949 | -30.0 C (-22.0 F) |
| 1950 | -26.7 C (-16.1 F) |
| 1951 | -23.9 C (-11.0 F) |
| 1952 | -22.2 C (-8.0 F) |
| 1953 | -14.4 C (6.1 F) |
| 1954 | -18.3 C (-0.9 F) |
| 1955 | -23.3 C (-9.9 F) |
| 1956 | -23.9 C (-11.0 F) |
| 1957 | -22.2 C (-8.0 F) |
| 1958 | -15.0 C (5.0 F) |
| 1959 | -22.8 C (-9.0 F) |
| 1960 | -21.1 C (-6.0 F) |
| 1961 | -18.3 C (-0.9 F) |
| 1962 | -28.9 C (-20.0 F) |
| 1963 | -28.3 C (-18.9 F) |
| 1964 | -22.2 C (-8.0 F) |
| 1965 | -15.0 C (5.0 F) |
| 1966 | -16.7 C (1.9 F) |
| 1967 | -21.7 C (-7.1 F) |
| 1968 | -20.0 C (-4.0 F) |
| 1969 | -13.9 C (7.0 F) |
| 1970 | -17.8 C (0.0 F) |
| 1971 | -21.7 C (-7.1 F) |
| 1972 | -26.1 C (-15.0 F) |
| 1973 | -17.8 C (0.0 F) |
| 1974 | -22.8 C (-9.0 F) |
| 1975 | -19.4 C (-2.9 F) |
| 1976 | -23.3 C (-9.9 F) |
| 1977 | -19.4 C (-2.9 F) |
| 1978 | -23.9 C (-11.0 F) |
| 1979 | -23.9 C (-11.0 F) |
| 1980 | -23.9 C (-11.0 F) |
| 1981 | -15.6 C (3.9 F) |
| 1982 | -25.6 C (-14.1 F) |
| 1983 | -25.6 C (-14.1 F) |
| 1984 | -25.0 C (-13.0 F) |
| 1985 | -27.2 C (-17.0 F) |
| 1986 | -16.1 C (3.0 F) |
| 1987 | -20.6 C (-5.1 F) |
| 1988 | -21.1 C (-6.0 F) |
| 1989 | -25.0 C (-13.0 F) |
| 1990 | -31.1 C (-24.0 F) |
| 1991 | -19.4 C (-2.9 F) |
| 1992 | -21.7 C (-7.1 F) |
| 1993 | -20.0 C (-4.0 F) |
| 1994 | -17.8 C (0.0 F) |
| 1995 | -16.1 C (3.0 F) |
| 1996 | -25.0 C (-13.0 F) |
| 1997 | -14.4 C (6.1 F) |
| 1998 | -20.0 C (-4.0 F) |
| 1999 | -13.9 C (7.0 F) |
| 2000 | -12.2 C (10.0 F) |
| 2001 | -15.6 C (3.9 F) |
| 2002 | -17.8 C (0.0 F) |
| 2003 | -13.3 C (8.1 F) |
| 2004 | -19.4 C (-2.9 F) |
| 2005 | -18.3 C (-0.9 F) |
| 2006 | -16.1 C (3.0 F) |
| 2007 | -18.3 C (-0.9 F) |
| 2008 | -19.4 C (-2.9 F) |
| 2009 | -21.1 C (-6.0 F) |
| 2010 | -21.1 C (-6.0 F) |
| 2011 | -18.3 C (-0.9 F) |
| 2012 | -13.3 C (8.1 F) |
| 2013 | -22.2 C (-8.0 F) |
| 2014 | -16.7 C (1.9 F) |
| 2015 | -21.7 C (-7.1 F) |
| 2016 | -20.6 C (-5.1 F) |
| 2017 | -25.0 C (-13.0 F) |
| 2018 | -12.2 C (10.0 F) |
| 2019 | -11.1 C (12.0 F) |
| 2020 | -11.7 C (10.9 F) |
| 2021 | -12.2 C (10.0 F) |
| 2022 | -16.7 C (1.9 F) |
| 2023 | -15.6 C (3.9 F) |
| 2024 | -14.4 C (6.1 F) |
| 2025 | -12.8 C (9.0 F) |
| 2026 | -10.6 C (12.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1915 | 17.0 mm (0.7 in) |
| 1916 | 18.3 mm (0.7 in) |
| 1917 | 19.6 mm (0.8 in) |
| 1918 | 17.8 mm (0.7 in) |
| 1919 | 11.9 mm (0.5 in) |
| 1920 | 18.5 mm (0.7 in) |
| 1921 | 24.9 mm (1.0 in) |
| 1922 | 15.7 mm (0.6 in) |
| 1923 | 33.5 mm (1.3 in) |
| 1924 | 15.5 mm (0.6 in) |
| 1925 | 15.7 mm (0.6 in) |
| 1926 | 8.4 mm (0.33 in) |
| 1927 | 20.8 mm (0.8 in) |
| 1928 | 14.0 mm (0.6 in) |
| 1929 | 19.1 mm (0.8 in) |
| 1930 | 33.5 mm (1.3 in) |
| 1931 | 21.3 mm (0.8 in) |
| 1932 | 16.5 mm (0.6 in) |
| 1933 | 11.9 mm (0.5 in) |
| 1934 | 13.7 mm (0.5 in) |
| 1935 | 24.6 mm (1.0 in) |
| 1936 | 27.2 mm (1.1 in) |
| 1937 | 18.5 mm (0.7 in) |
| 1938 | 17.8 mm (0.7 in) |
| 1939 | 17.8 mm (0.7 in) |
| 1940 | 18.3 mm (0.7 in) |
| 1941 | 15.7 mm (0.6 in) |
| 1942 | 21.8 mm (0.9 in) |
| 1943 | 23.9 mm (0.9 in) |
| 1944 | 23.4 mm (0.9 in) |
| 1945 | 19.8 mm (0.8 in) |
| 1946 | 24.9 mm (1.0 in) |
| 1947 | 13.0 mm (0.5 in) |
| 1948 | 21.6 mm (0.9 in) |
| 1949 | 13.5 mm (0.5 in) |
| 1950 | 22.9 mm (0.9 in) |
| 1951 | 13.2 mm (0.5 in) |
| 1952 | 28.2 mm (1.1 in) |
| 1953 | 21.3 mm (0.8 in) |
| 1954 | 13.5 mm (0.5 in) |
| 1955 | 17.8 mm (0.7 in) |
| 1956 | 24.1 mm (0.9 in) |
| 1957 | 19.3 mm (0.8 in) |
| 1958 | 26.2 mm (1.0 in) |
| 1959 | 21.3 mm (0.8 in) |
| 1960 | 16.3 mm (0.6 in) |
| 1961 | 42.2 mm (1.7 in) |
| 1962 | 23.4 mm (0.9 in) |
| 1963 | 27.9 mm (1.1 in) |
| 1964 | 36.8 mm (1.4 in) |
| 1965 | 12.2 mm (0.5 in) |
| 1966 | 7.9 mm (0.31 in) |
| 1967 | 16.5 mm (0.6 in) |
| 1968 | 25.4 mm (1.0 in) |
| 1969 | 9.9 mm (0.39 in) |
| 1970 | 24.9 mm (1.0 in) |
| 1971 | 15.2 mm (0.6 in) |
| 1972 | 19.3 mm (0.8 in) |
| 1973 | 25.7 mm (1.0 in) |
| 1974 | 18.8 mm (0.7 in) |
| 1975 | 30.5 mm (1.2 in) |
| 1976 | 17.8 mm (0.7 in) |
| 1977 | 15.2 mm (0.6 in) |
| 1978 | 24.9 mm (1.0 in) |
| 1979 | 27.2 mm (1.1 in) |
| 1980 | 21.3 mm (0.8 in) |
| 1981 | 41.4 mm (1.6 in) |
| 1982 | 17.3 mm (0.7 in) |
| 1983 | 25.4 mm (1.0 in) |
| 1984 | 24.4 mm (1.0 in) |
| 1985 | 19.3 mm (0.8 in) |
| 1986 | 33.3 mm (1.3 in) |
| 1987 | 12.2 mm (0.5 in) |
| 1988 | 16.5 mm (0.6 in) |
| 1989 | 15.2 mm (0.6 in) |
| 1990 | 16.3 mm (0.6 in) |
| 1991 | 18.0 mm (0.7 in) |
| 1992 | 16.0 mm (0.6 in) |
| 1993 | 12.7 mm (0.5 in) |
| 1994 | 23.1 mm (0.9 in) |
| 1995 | 23.9 mm (0.9 in) |
| 1996 | 23.4 mm (0.9 in) |
| 1997 | 15.5 mm (0.6 in) |
| 1998 | 21.6 mm (0.9 in) |
| 1999 | 16.8 mm (0.7 in) |
| 2000 | 17.8 mm (0.7 in) |
| 2001 | 36.3 mm (1.4 in) |
| 2002 | 19.6 mm (0.8 in) |
| 2003 | 32.0 mm (1.3 in) |
| 2004 | 11.9 mm (0.5 in) |
| 2005 | 39.9 mm (1.6 in) |
| 2006 | 21.1 mm (0.8 in) |
| 2007 | 19.8 mm (0.8 in) |
| 2008 | 20.6 mm (0.8 in) |
| 2009 | 22.1 mm (0.9 in) |
| 2010 | 31.0 mm (1.2 in) |
| 2011 | 19.8 mm (0.8 in) |
| 2012 | 30.2 mm (1.2 in) |
| 2013 | 6.6 mm (0.26 in) |
| 2014 | 39.4 mm (1.6 in) |
| 2015 | 30.5 mm (1.2 in) |
| 2016 | 30.5 mm (1.2 in) |
| 2017 | 17.3 mm (0.7 in) |
| 2018 | 16.8 mm (0.7 in) |
| 2019 | 20.6 mm (0.8 in) |
| 2020 | 17.8 mm (0.7 in) |
| 2021 | 24.4 mm (1.0 in) |
| 2022 | 50.8 mm (2.0 in) |
| 2023 | 15.5 mm (0.6 in) |
| 2024 | 12.7 mm (0.5 in) |
| 2025 | 11.9 mm (0.5 in) |
| 2026 | 17.8 mm (0.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1915 | 15.8 mm (0.6 in) |
| 1916 | 37.1 mm (1.5 in) |
| 1917 | 41.7 mm (1.6 in) |
| 1918 | 26.4 mm (1.0 in) |
| 1919 | 18.5 mm (0.7 in) |
| 1920 | 20.8 mm (0.8 in) |
| 1921 | 40.0 mm (1.6 in) |
| 1922 | 21.7 mm (0.9 in) |
| 1923 | 34.8 mm (1.4 in) |
| 1924 | 24.4 mm (1.0 in) |
| 1925 | 26.9 mm (1.1 in) |
| 1926 | 21.4 mm (0.8 in) |
| 1927 | 47.7 mm (1.9 in) |
| 1928 | 33.1 mm (1.3 in) |
| 1929 | 28.7 mm (1.1 in) |
| 1930 | 42.4 mm (1.7 in) |
| 1931 | 31.9 mm (1.3 in) |
| 1932 | 20.3 mm (0.8 in) |
| 1933 | 17.3 mm (0.7 in) |
| 1934 | 21.9 mm (0.9 in) |
| 1935 | 39.8 mm (1.6 in) |
| 1936 | 58.6 mm (2.3 in) |
| 1937 | 46.2 mm (1.8 in) |
| 1938 | 35.8 mm (1.4 in) |
| 1939 | 18.6 mm (0.7 in) |
| 1940 | 32.0 mm (1.3 in) |
| 1941 | 22.5 mm (0.9 in) |
| 1942 | 40.6 mm (1.6 in) |
| 1943 | 32.3 mm (1.3 in) |
| 1944 | 37.8 mm (1.5 in) |
| 1945 | 31.1 mm (1.2 in) |
| 1946 | 38.9 mm (1.5 in) |
| 1947 | 23.9 mm (0.9 in) |
| 1948 | 39.1 mm (1.5 in) |
| 1949 | 21.7 mm (0.9 in) |
| 1950 | 35.5 mm (1.4 in) |
| 1951 | 29.3 mm (1.2 in) |
| 1952 | 46.2 mm (1.8 in) |
| 1953 | 42.2 mm (1.7 in) |
| 1954 | 21.8 mm (0.9 in) |
| 1955 | 36.5 mm (1.4 in) |
| 1956 | 28.2 mm (1.1 in) |
| 1957 | 29.5 mm (1.2 in) |
| 1958 | 28.2 mm (1.1 in) |
| 1959 | 27.8 mm (1.1 in) |
| 1960 | 28.8 mm (1.1 in) |
| 1961 | 45.9 mm (1.8 in) |
| 1962 | 37.2 mm (1.5 in) |
| 1963 | 60.6 mm (2.4 in) |
| 1964 | 78.8 mm (3.1 in) |
| 1965 | 16.4 mm (0.6 in) |
| 1966 | 16.0 mm (0.6 in) |
| 1967 | 29.5 mm (1.2 in) |
| 1968 | 70.1 mm (2.8 in) |
| 1969 | 21.4 mm (0.8 in) |
| 1970 | 43.1 mm (1.7 in) |
| 1971 | 38.4 mm (1.5 in) |
| 1972 | 48.0 mm (1.9 in) |
| 1973 | 35.6 mm (1.4 in) |
| 1974 | 24.6 mm (1.0 in) |
| 1975 | 37.1 mm (1.5 in) |
| 1976 | 29.5 mm (1.2 in) |
| 1977 | 35.8 mm (1.4 in) |
| 1978 | 36.6 mm (1.4 in) |
| 1979 | 44.2 mm (1.7 in) |
| 1980 | 48.5 mm (1.9 in) |
| 1981 | 46.7 mm (1.8 in) |
| 1982 | 37.9 mm (1.5 in) |
| 1983 | 44.0 mm (1.7 in) |
| 1984 | 36.3 mm (1.4 in) |
| 1985 | 32.6 mm (1.3 in) |
| 1986 | 60.2 mm (2.4 in) |
| 1987 | 19.8 mm (0.8 in) |
| 1988 | 34.0 mm (1.3 in) |
| 1989 | 30.8 mm (1.2 in) |
| 1990 | 31.1 mm (1.2 in) |
| 1991 | 25.2 mm (1.0 in) |
| 1992 | 22.4 mm (0.9 in) |
| 1993 | 29.7 mm (1.2 in) |
| 1994 | 39.7 mm (1.6 in) |
| 1995 | 44.5 mm (1.8 in) |
| 1996 | 42.0 mm (1.7 in) |
| 1997 | 33.0 mm (1.3 in) |
| 1998 | 72.1 mm (2.8 in) |
| 1999 | 41.4 mm (1.6 in) |
| 2000 | 27.2 mm (1.1 in) |
| 2001 | 44.2 mm (1.7 in) |
| 2002 | 22.9 mm (0.9 in) |
| 2003 | 35.8 mm (1.4 in) |
| 2004 | 23.1 mm (0.9 in) |
| 2005 | 68.1 mm (2.7 in) |
| 2006 | 61.7 mm (2.4 in) |
| 2007 | 27.6 mm (1.1 in) |
| 2008 | 28.2 mm (1.1 in) |
| 2009 | 29.3 mm (1.2 in) |
| 2010 | 38.6 mm (1.5 in) |
| 2011 | 24.3 mm (1.0 in) |
| 2012 | 71.1 mm (2.8 in) |
| 2013 | 12.2 mm (0.5 in) |
| 2014 | 62.3 mm (2.5 in) |
| 2015 | 51.1 mm (2.0 in) |
| 2016 | 45.8 mm (1.8 in) |
| 2017 | 32.0 mm (1.3 in) |
| 2018 | 20.1 mm (0.8 in) |
| 2019 | 24.4 mm (1.0 in) |
| 2020 | 19.1 mm (0.8 in) |
| 2021 | 32.8 mm (1.3 in) |
| 2022 | 57.2 mm (2.3 in) |
| 2023 | 25.2 mm (1.0 in) |
| 2024 | 31.5 mm (1.2 in) |
| 2025 | 28.0 mm (1.1 in) |
| 2026 | 25.5 mm (1.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1915 | 48 days |
| 1916 | 77 days |
| 1917 | 24 days |
| 1918 | 29 days |
| 1919 | 84 days |
| 1920 | 55 days |
| 1921 | 61 days |
| 1922 | 42 days |
| 1923 | 37 days |
| 1924 | 117 days |
| 1925 | 25 days |
| 1926 | 55 days |
| 1927 | 107 days |
| 1928 | 70 days |
| 1929 | 71 days |
| 1930 | 39 days |
| 1931 | 37 days |
| 1932 | 45 days |
| 1933 | 129 days |
| 1934 | 82 days |
| 1935 | 103 days |
| 1936 | 50 days |
| 1937 | 50 days |
| 1938 | 33 days |
| 1939 | 51 days |
| 1940 | 86 days |
| 1941 | 29 days |
| 1942 | 58 days |
| 1943 | 99 days |
| 1944 | 45 days |
| 1945 | 65 days |
| 1946 | 54 days |
| 1947 | 55 days |
| 1948 | 75 days |
| 1949 | 55 days |
| 1950 | 35 days |
| 1951 | 76 days |
| 1952 | 116 days |
| 1953 | 100 days |
| 1954 | 51 days |
| 1955 | 57 days |
| 1956 | 43 days |
| 1957 | 41 days |
| 1958 | 53 days |
| 1959 | 53 days |
| 1960 | 66 days |
| 1961 | 41 days |
| 1962 | 41 days |
| 1963 | 41 days |
| 1964 | 37 days |
| 1965 | 54 days |
| 1966 | 50 days |
| 1967 | 56 days |
| 1968 | 35 days |
| 1969 | 75 days |
| 1970 | 36 days |
| 1971 | 38 days |
| 1972 | 39 days |
| 1973 | 40 days |
| 1974 | 56 days |
| 1975 | 56 days |
| 1976 | 48 days |
| 1977 | 47 days |
| 1978 | 54 days |
| 1979 | 29 days |
| 1980 | 46 days |
| 1981 | 106 days |
| 1982 | 25 days |
| 1983 | 33 days |
| 1984 | 23 days |
| 1985 | 59 days |
| 1986 | 67 days |
| 1987 | 102 days |
| 1988 | 85 days |
| 1989 | 38 days |
| 1990 | 40 days |
| 1991 | 70 days |
| 1992 | 63 days |
| 1993 | 46 days |
| 1994 | 69 days |
| 1995 | 54 days |
| 1996 | 48 days |
| 1997 | 45 days |
| 1998 | 50 days |
| 1999 | 75 days |
| 2000 | 88 days |
| 2001 | 52 days |
| 2002 | 39 days |
| 2003 | 72 days |
| 2004 | 27 days |
| 2005 | 56 days |
| 2006 | 72 days |
| 2007 | 68 days |
| 2008 | 59 days |
| 2009 | 88 days |
| 2010 | 44 days |
| 2011 | 84 days |
| 2012 | 49 days |
| 2013 | 40 days |
| 2014 | 39 days |
| 2015 | 35 days |
| 2016 | 65 days |
| 2017 | 49 days |
| 2018 | 51 days |
| 2019 | 17 days |
| 2020 | 45 days |
| 2021 | 60 days |
| 2022 | 131 days |
| 2023 | 67 days |
| 2024 | 25 days |
| 2025 | 48 days |
| 2026 | 47 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
83 years with a frostAcross 83 years with a frost, the median last spring frost at Jerome falls on 11 May and the median first autumn frost on 4 October, which leaves a median of 141 days between them.
In 1982 to 2025 the median growing season was 154 days. That is 15 days more than in 1916 to 1958.
Fitted over all years, the growing season changes by +2.3 days per decade at this station.
| Measure | Median, all years | Earliest period (1916 to 1958) | Recent period (1982 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 11 May | 13 May | 7 May | 6 days earlier | -0.9 days per decade |
| First autumn frost | 4 October | 1 October | 6 October | 5 days later | +1.4 days per decade |
| Growing days | 141 days | 139 days | 154 days | 15 days more | +2.3 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
102 years, 1916 to 2025A day with at least 19.9 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 47.5 mm (1.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 19.9 mm (0.8 in) | |
| 5 years | 27.0 mm (1.1 in) | |
| 10 years | 31.9 mm (1.3 in) | |
| 25 years | 38.1 mm (1.5 in) | |
| 50 years | 42.8 mm (1.7 in) | |
| 100 years | 47.5 mm (1.9 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 102 years of values from 1916 to 2025.
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: 50.8 mm (2.0 in) in 2022; 42.2 mm (1.7 in) in 1961; 41.4 mm (1.6 in) in 1981.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Jerome, at 1954. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1954 ran 0.5 C (0.8 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1954 | +0.5 | +0.8 | likely | 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.
Climate Twins
1999 to 2025 against 1961 to 1990Over 1999 to 2025, Jerome had a mean temperature of 10.2 C (50.3 F) and 247.5 mm (9.7 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Garrison (United States, 424 km away), Elberta (United States, 376 km away) and Mtn Home (United States, 107 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Garrison | United States | 424 km (263 mi) | 10.2 C (50.3 F) | 195.5 mm (7.7 in) | 0.55 |
| Elberta | United States | 376 km (234 mi) | 10.2 C (50.3 F) | 289.5 mm (11.4 in) | 0.57 |
| Mtn Home | United States | 107 km (66 mi) | 10.2 C (50.3 F) | 279.2 mm (11.0 in) | 0.59 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-14).