Upton Weather Records (USC00489205)
Record envelope, standing records and threshold days for Upton (USC00489205), Wyoming, United States, with 119 years of record.
Key Facts for Upton
- Upton (USC00489205) is a weather station in Wyoming, United States at 44.09 latitude and -104.61 longitude, 1,317 m (4,320 ft) above sea level.
- The station reports from 1908 to 2026, 119 years of record.
- 1,464 records set at Upton still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Upton tied a daily record high maximum temperature of 37.8 C (100.0 F) on 10 August 2026.
About the Station
- Location: Wyoming, United States, 44.09 latitude, -104.61 longitude.
- Elevation: 1,317 m (4,320 ft).
- Period of record: 1908 to 2026, 119 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
25 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 18.3 C (64.9 F) | -42.8 C (-45.0 F) | 12.2 C (54.0 F) | -26.1 C (-15.0 F) |
| Feb | 20.0 C (68.0 F) | -36.7 C (-34.1 F) | 17.8 C (64.0 F) | -22.8 C (-9.0 F) |
| Mar | 30.0 C (86.0 F) | -33.9 C (-29.0 F) | 30.0 C (86.0 F) | -18.9 C (-2.0 F) |
| Apr | 31.1 C (88.0 F) | -23.9 C (-11.0 F) | 30.0 C (86.0 F) | -6.7 C (19.9 F) |
| May | 35.0 C (95.0 F) | -15.0 C (5.0 F) | 32.2 C (90.0 F) | -8.3 C (17.1 F) |
| Jun | 40.6 C (105.1 F) | -3.3 C (26.1 F) | 36.7 C (98.1 F) | 1.7 C (35.1 F) |
| Jul | 43.3 C (109.9 F) | -1.1 C (30.0 F) | 41.1 C (106.0 F) | 11.7 C (53.1 F) |
| Aug | 40.0 C (104.0 F) | -4.4 C (24.1 F) | 40.0 C (104.0 F) | 5.6 C (42.1 F) |
| Sep | 38.3 C (100.9 F) | -14.4 C (6.1 F) | n/a | n/a |
| Oct | 32.8 C (91.0 F) | -23.3 C (-9.9 F) | n/a | n/a |
| Nov | 29.4 C (84.9 F) | -32.2 C (-26.0 F) | n/a | n/a |
| Dec | 19.4 C (66.9 F) | -41.1 C (-42.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1913 | 16 |
| 1914 | 15 |
| 1915 | 30 |
| 1916 | 9 |
| 1917 | 20 |
| 1918 | 2 |
| 1919 | 9 |
| 1920 | 10 |
| 1921 | 18 |
| 1922 | 12 |
| 1923 | 5 |
| 1924 | 27 |
| 1925 | 14 |
| 1926 | 23 |
| 1927 | 25 |
| 1928 | 15 |
| 1952 | 14 |
| 1953 | 13 |
| 1954 | 26 |
| 1955 | 19 |
| 1956 | 13 |
| 1957 | 12 |
| 1958 | 16 |
| 1959 | 18 |
| 1960 | 17 |
| 1961 | 6 |
| 1962 | 18 |
| 1963 | 19 |
| 1964 | 16 |
| 1965 | 21 |
| 1966 | 16 |
| 1967 | 18 |
| 1968 | 22 |
| 1969 | 16 |
| 1970 | 15 |
| 1971 | 10 |
| 1972 | 28 |
| 1973 | 12 |
| 1974 | 17 |
| 1975 | 15 |
| 1976 | 11 |
| 1977 | 11 |
| 1978 | 11 |
| 1979 | 7 |
| 1980 | 16 |
| 1981 | 18 |
| 1982 | 9 |
| 1983 | 21 |
| 1984 | 9 |
| 1985 | 30 |
| 1986 | 19 |
| 1987 | 12 |
| 1988 | 14 |
| 1989 | 25 |
| 1990 | 22 |
| 1991 | 5 |
| 1992 | 14 |
| 1993 | 10 |
| 1994 | 11 |
| 1995 | 27 |
| 1996 | 20 |
| 1997 | 19 |
| 1998 | 14 |
| 1999 | 12 |
| 2000 | 23 |
| 2001 | 11 |
| 2002 | 15 |
| 2003 | 24 |
| 2004 | 6 |
| 2005 | 15 |
| 2006 | 20 |
| 2007 | 14 |
| 2008 | 7 |
| 2009 | 20 |
| 2010 | 10 |
| 2011 | 11 |
| 2012 | 18 |
| 2013 | 10 |
| 2014 | 13 |
| 2015 | 20 |
| 2016 | 27 |
| 2017 | 12 |
| 2018 | 8 |
| 2019 | 16 |
| 2020 | 23 |
| 2021 | 23 |
| 2022 | 19 |
| 2023 | 12 |
| 2024 | 21 |
| 2025 | 19 |
| 2026 | 33 |
All-Time Record Progression
5 new records| Date | Kind | Detail |
|---|---|---|
| 1976-07-21 | Record daily precipitation | Record daily precipitation 80.0 mm (3.1 in) |
| 1989-02-03 | Record low maximum temperature | Record low maximum temperature -30.0 C (-22.0 F) |
| 1994-02-02 | Record snow depth | Record snow depth 63.5 cm (25.0 in) |
| 2013-10-04 | Record daily snowfall | Record daily snowfall 45.7 cm (18.0 in) |
| 2024-07-25 | Record high minimum temperature | Record high minimum temperature 26.7 C (80.1 F) |
Wettest Day of Each Month
Jul: 80.0 mm (3.1 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 34.3 mm (1.4 in) | 16 January 1926 |
| Feb | 26.7 mm (1.1 in) | 12 February 1966 |
| Mar | 40.6 mm (1.6 in) | 18 March 2018 |
| Apr | 48.5 mm (1.9 in) | 19 April 1971 |
| May | 50.3 mm (2.0 in) | 24 May 2008 |
| Jun | 57.2 mm (2.3 in) | 14 June 1976 |
| Jul | 80.0 mm (3.1 in) | 21 July 1976 |
| Aug | 58.9 mm (2.3 in) | 16 August 1957 |
| Sep | 56.6 mm (2.2 in) | 29 September 1923 |
| Oct | 53.3 mm (2.1 in) | 6 October 1994 |
| Nov | 50.8 mm (2.0 in) | 4 November 2003 |
| Dec | 25.4 mm (1.0 in) | 11 December 1949 |
Period of Record Coverage
1909 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1909 | 3 | 1% | No |
| 1913 | 293 | 80% | No |
| 1914 | 361 | 99% | Yes |
| 1915 | 352 | 96% | Yes |
| 1916 | 86 | 23% | No |
| 1917 | 315 | 86% | No |
| 1918 | 24 | 7% | No |
| 1919 | 131 | 36% | No |
| 1920 | 275 | 75% | No |
| 1921 | 248 | 68% | No |
| 1922 | 292 | 80% | No |
| 1923 | 283 | 78% | No |
| 1924 | 258 | 70% | No |
| 1925 | 289 | 79% | No |
| 1926 | 304 | 83% | No |
| 1927 | 354 | 97% | Yes |
| 1928 | 263 | 72% | No |
| 1952 | 262 | 72% | No |
| 1953 | 363 | 99% | Yes |
| 1954 | 362 | 99% | Yes |
| 1955 | 361 | 99% | Yes |
| 1956 | 352 | 96% | Yes |
| 1957 | 355 | 97% | Yes |
| 1958 | 356 | 98% | Yes |
| 1959 | 359 | 98% | Yes |
| 1960 | 359 | 98% | Yes |
| 1961 | 357 | 98% | Yes |
| 1962 | 363 | 99% | Yes |
| 1963 | 362 | 99% | Yes |
| 1964 | 363 | 99% | Yes |
| 1965 | 362 | 99% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 363 | 99% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 356 | 98% | Yes |
| 1972 | 362 | 99% | Yes |
| 1973 | 350 | 96% | Yes |
| 1974 | 363 | 99% | Yes |
| 1975 | 360 | 99% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 267 | 73% | No |
| 1979 | 355 | 97% | Yes |
| 1980 | 353 | 96% | Yes |
| 1981 | 356 | 98% | Yes |
| 1982 | 354 | 97% | Yes |
| 1983 | 357 | 98% | Yes |
| 1984 | 358 | 98% | Yes |
| 1985 | 360 | 99% | Yes |
| 1986 | 353 | 97% | Yes |
| 1987 | 353 | 97% | Yes |
| 1988 | 348 | 95% | Yes |
| 1989 | 354 | 97% | Yes |
| 1990 | 354 | 97% | Yes |
| 1991 | 311 | 85% | No |
| 1992 | 318 | 87% | No |
| 1993 | 356 | 98% | Yes |
| 1994 | 359 | 98% | Yes |
| 1995 | 359 | 98% | Yes |
| 1996 | 362 | 99% | Yes |
| 1997 | 360 | 99% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 362 | 99% | Yes |
| 2000 | 362 | 99% | Yes |
| 2001 | 363 | 99% | Yes |
| 2002 | 362 | 99% | Yes |
| 2003 | 357 | 98% | Yes |
| 2004 | 365 | 100% | Yes |
| 2005 | 363 | 99% | Yes |
| 2006 | 364 | 100% | Yes |
| 2007 | 361 | 99% | Yes |
| 2008 | 363 | 99% | Yes |
| 2009 | 362 | 99% | Yes |
| 2010 | 358 | 98% | Yes |
| 2011 | 363 | 99% | Yes |
| 2012 | 334 | 91% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 363 | 99% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 304 | 83% | No |
| 2019 | 364 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 325 | 89% | No |
| 2026 | 229 | 63% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 10 August 2026 | Upton, US | daily high max (Tie) | 37.8 C (100.0 F) | tie | 4 years | 2 of 100 (Routine) |
| 8 August 2026 | Upton, US | daily high max (Tie) | 37.8 C (100.0 F) | tie | 40 years | 5 of 100 (Routine) |
| 2 August 2026 | Upton, US | monthly high max | 40.0 C (104.0 F) | 0.6 C (1.1 F) | 2 years | 21 of 100 (Routine) |
| 26 July 2026 | Upton, US | daily high max | 40.6 C (105.1 F) | 2.3 C (4.1 F) | 4 years | 16 of 100 (Routine) |
| 25 July 2026 | Upton, US | daily high max | 41.1 C (106.0 F) | 1.1 C (2.0 F) | 1 year | 12 of 100 (Routine) |
| 14 July 2026 | Upton, US | daily high min | 21.1 C (70.0 F) | 2.2 C (4.0 F) | 20 years | 22 of 100 (Routine) |
| 13 July 2026 | Upton, US | daily high max | 38.9 C (102.0 F) | 0.6 C (1.1 F) | 23 years | 17 of 100 (Routine) |
| 11 July 2026 | Upton, US | daily high min (Tie) | 21.1 C (70.0 F) | tie | 104 years | 10 of 100 (Routine) |
| 6 July 2026 | Upton, US | daily high min | 21.7 C (71.1 F) | 0.6 C (1.1 F) | 44 years | 24 of 100 (Routine) |
| 5 July 2026 | Upton, US | daily high max | 38.3 C (100.9 F) | 0.5 C (0.9 F) | 72 years | 32 of 100 (Routine) |
| 7 June 2026 | Upton, US | daily high min (Tie) | 17.2 C (63.0 F) | tie | 20 years | 4 of 100 (Routine) |
| 6 June 2026 | Upton, US | daily high min | 18.3 C (64.9 F) | 0.5 C (0.9 F) | 37 years | 22 of 100 (Routine) |
| 6 June 2026 | Upton, US | daily high max | 36.1 C (97.0 F) | 0.5 C (0.9 F) | 37 years | 21 of 100 (Routine) |
| 26 May 2026 | Upton, US | daily high min | 17.2 C (63.0 F) | 1.1 C (2.0 F) | 20 years | 18 of 100 (Routine) |
| 18 May 2026 | Upton, US | daily low min | -2.2 C (28.0 F) | 0.5 C (0.9 F) | 111 years | 41 of 100 (Notable) |
| 11 May 2026 | Upton, US | daily high max | 31.7 C (89.1 F) | 2.3 C (4.1 F) | 0 years | 13 of 100 (Routine) |
| 6 May 2026 | Upton, US | daily low min | -8.3 C (17.1 F) | 2.7 C (4.9 F) | 111 years | 45 of 100 (Notable) |
| 17 April 2026 | Upton, US | daily snow depth (Tie) | 5.1 cm (2.0 in) | tie | 12 years | 3 of 100 (Routine) |
| 12 April 2026 | Upton, US | daily high max (Tie) | 26.7 C (80.1 F) | tie | 23 years | 4 of 100 (Routine) |
| 25 March 2026 | Upton, US | daily high max | 28.3 C (82.9 F) | 4.4 C (7.9 F) | 19 years | 20 of 100 (Routine) |
Climate Trend
69 complete years, 1914 to 2024| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1914 | 6.8 C | -0.20 C |
| 1915 | 5.1 C | -1.89 C |
| 1923 | 6.6 C | -0.34 C |
| 1927 | 5.2 C | -1.71 C |
| 1953 | 7.6 C | +0.68 C |
| 1954 | 7.8 C | +0.88 C |
| 1955 | 5.5 C | -1.47 C |
| 1956 | 6.3 C | -0.65 C |
| 1957 | 5.9 C | -1.05 C |
| 1958 | 6.7 C | -0.28 C |
| 1959 | 6.2 C | -0.74 C |
| 1960 | 6.9 C | -0.02 C |
| 1962 | 6.9 C | -0.06 C |
| 1963 | 7.8 C | +0.87 C |
| 1964 | 6.2 C | -0.75 C |
| 1965 | 6.2 C | -0.78 C |
| 1966 | 6.4 C | -0.54 C |
| 1967 | 6.3 C | -0.67 C |
| 1968 | 5.6 C | -1.36 C |
| 1969 | 5.7 C | -1.27 C |
| 1970 | 5.6 C | -1.38 C |
| 1971 | 5.4 C | -1.57 C |
| 1972 | 5.3 C | -1.69 C |
| 1973 | 5.9 C | -1.02 C |
| 1974 | 6.3 C | -0.63 C |
| 1975 | 5.2 C | -1.71 C |
| 1976 | 6.4 C | -0.58 C |
| 1977 | 7.0 C | +0.04 C |
| 1980 | 7.4 C | +0.42 C |
| 1981 | 8.4 C | +1.41 C |
| 1982 | 5.5 C | -1.45 C |
| 1983 | 7.0 C | +0.04 C |
| 1984 | 6.5 C | -0.42 C |
| 1985 | 5.9 C | -1.06 C |
| 1986 | 7.5 C | +0.55 C |
| 1987 | 8.5 C | +1.56 C |
| 1988 | 8.2 C | +1.20 C |
| 1989 | 6.9 C | -0.01 C |
| 1990 | 7.6 C | +0.65 C |
| 1993 | 5.3 C | -1.67 C |
| 1994 | 8.0 C | +1.00 C |
| 1995 | 7.4 C | +0.40 C |
| 1996 | 5.9 C | -1.10 C |
| 1997 | 7.2 C | +0.26 C |
| 1998 | 7.9 C | +0.91 C |
| 1999 | 8.7 C | +1.77 C |
| 2000 | 7.5 C | +0.59 C |
| 2001 | 8.0 C | +1.04 C |
| 2002 | 7.4 C | +0.45 C |
| 2003 | 7.7 C | +0.79 C |
| 2004 | 8.0 C | +1.05 C |
| 2005 | 8.2 C | +1.27 C |
| 2006 | 8.6 C | +1.63 C |
| 2007 | 8.3 C | +1.34 C |
| 2008 | 6.4 C | -0.53 C |
| 2009 | 6.9 C | -0.06 C |
| 2010 | 7.4 C | +0.41 C |
| 2011 | 6.8 C | -0.12 C |
| 2013 | 7.1 C | +0.11 C |
| 2014 | 6.7 C | -0.26 C |
| 2015 | 8.4 C | +1.45 C |
| 2016 | 9.0 C | +2.07 C |
| 2017 | 7.8 C | +0.83 C |
| 2019 | 5.6 C | -1.39 C |
| 2020 | 7.7 C | +0.72 C |
| 2021 | 8.1 C | +1.13 C |
| 2022 | 6.8 C | -0.14 C |
| 2023 | 7.6 C | +0.66 C |
| 2024 | 9.2 C | +2.28 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1914 to 2024. In Fahrenheit: 0.4 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 69 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.2 to 0.5) per decade | 1914 to 2024 | 69 | Rise |
| Mean daily maximum | 0.08 C (-0.02 to 0.17) per decade | 0.14 F (-0.03 to 0.31) per decade | 1914 to 2024 | 69 | Not clearly different from zero |
| Mean daily minimum | 0.3 C (0.2 to 0.4) per decade | 0.6 F (0.4 to 0.8) per decade | 1914 to 2024 | 69 | 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
1908 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 43.3 C (109.9 F) | 1954 | 37.8 C (100.0 F) | 92 |
| Coldest night (TNn) | -42.8 C (-45.0 F) | 1915 | -31.9 C (-25.5 F) | 92 |
| Wettest day (Rx1day) | 80.0 mm (3.1 in) | 1976 | 30.5 mm (1.2 in) | 98 |
| Wettest five days (Rx5day) | 93.2 mm (3.7 in) | 1976 | 50.1 mm (2.0 in) | 98 |
| Longest dry spell (CDD) | 75 days | 1999 | 33 days | 98 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1908 | n/a |
| 1909 | 23.9 C (75.0 F) |
| 1910 | n/a |
| 1913 | 37.2 C (99.0 F) |
| 1914 | 37.8 C (100.0 F) |
| 1915 | 35.6 C (96.1 F) |
| 1916 | 15.6 C (60.1 F) |
| 1917 | 38.9 C (102.0 F) |
| 1918 | 13.9 C (57.0 F) |
| 1919 | 38.3 C (100.9 F) |
| 1920 | 37.2 C (99.0 F) |
| 1921 | 40.6 C (105.1 F) |
| 1922 | 38.9 C (102.0 F) |
| 1923 | 37.8 C (100.0 F) |
| 1924 | 36.7 C (98.1 F) |
| 1925 | 39.4 C (102.9 F) |
| 1926 | 38.9 C (102.0 F) |
| 1927 | 35.6 C (96.1 F) |
| 1928 | 37.2 C (99.0 F) |
| 1948 | n/a |
| 1949 | n/a |
| 1950 | n/a |
| 1951 | n/a |
| 1952 | 39.4 C (102.9 F) |
| 1953 | 37.2 C (99.0 F) |
| 1954 | 43.3 C (109.9 F) |
| 1955 | 37.2 C (99.0 F) |
| 1956 | 37.2 C (99.0 F) |
| 1957 | 37.8 C (100.0 F) |
| 1958 | 38.3 C (100.9 F) |
| 1959 | 38.3 C (100.9 F) |
| 1960 | 38.3 C (100.9 F) |
| 1961 | 38.3 C (100.9 F) |
| 1962 | 35.0 C (95.0 F) |
| 1963 | 35.6 C (96.1 F) |
| 1964 | 36.1 C (97.0 F) |
| 1965 | 37.2 C (99.0 F) |
| 1966 | 39.4 C (102.9 F) |
| 1967 | 35.0 C (95.0 F) |
| 1968 | 36.7 C (98.1 F) |
| 1969 | 36.7 C (98.1 F) |
| 1970 | 38.3 C (100.9 F) |
| 1971 | 36.1 C (97.0 F) |
| 1972 | 37.2 C (99.0 F) |
| 1973 | 39.4 C (102.9 F) |
| 1974 | 37.8 C (100.0 F) |
| 1975 | 37.8 C (100.0 F) |
| 1976 | 36.1 C (97.0 F) |
| 1977 | 38.9 C (102.0 F) |
| 1978 | 37.8 C (100.0 F) |
| 1979 | 37.2 C (99.0 F) |
| 1980 | 38.9 C (102.0 F) |
| 1981 | 40.6 C (105.1 F) |
| 1982 | 38.3 C (100.9 F) |
| 1983 | 39.4 C (102.9 F) |
| 1984 | 36.7 C (98.1 F) |
| 1985 | 38.9 C (102.0 F) |
| 1986 | 38.9 C (102.0 F) |
| 1987 | 37.2 C (99.0 F) |
| 1988 | 38.3 C (100.9 F) |
| 1989 | 39.4 C (102.9 F) |
| 1990 | 37.8 C (100.0 F) |
| 1991 | 36.7 C (98.1 F) |
| 1992 | 36.1 C (97.0 F) |
| 1993 | 35.0 C (95.0 F) |
| 1994 | 37.2 C (99.0 F) |
| 1995 | 37.8 C (100.0 F) |
| 1996 | 37.8 C (100.0 F) |
| 1997 | 36.7 C (98.1 F) |
| 1998 | 38.3 C (100.9 F) |
| 1999 | 36.7 C (98.1 F) |
| 2000 | 37.8 C (100.0 F) |
| 2001 | 38.9 C (102.0 F) |
| 2002 | 40.0 C (104.0 F) |
| 2003 | 39.4 C (102.9 F) |
| 2004 | 37.8 C (100.0 F) |
| 2005 | 40.6 C (105.1 F) |
| 2006 | 40.6 C (105.1 F) |
| 2007 | 38.3 C (100.9 F) |
| 2008 | 35.6 C (96.1 F) |
| 2009 | 37.2 C (99.0 F) |
| 2010 | 38.9 C (102.0 F) |
| 2011 | 39.4 C (102.9 F) |
| 2012 | 40.0 C (104.0 F) |
| 2013 | 37.2 C (99.0 F) |
| 2014 | 38.9 C (102.0 F) |
| 2015 | 37.2 C (99.0 F) |
| 2016 | 40.0 C (104.0 F) |
| 2017 | 38.3 C (100.9 F) |
| 2018 | 38.3 C (100.9 F) |
| 2019 | 33.9 C (93.0 F) |
| 2020 | 37.8 C (100.0 F) |
| 2021 | 40.6 C (105.1 F) |
| 2022 | 38.9 C (102.0 F) |
| 2023 | 39.4 C (102.9 F) |
| 2024 | 40.0 C (104.0 F) |
| 2025 | 37.2 C (99.0 F) |
| 2026 | 41.1 C (106.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1908 | n/a |
| 1909 | 10.0 C (50.0 F) |
| 1910 | n/a |
| 1913 | -24.4 C (-11.9 F) |
| 1914 | -31.7 C (-25.1 F) |
| 1915 | -42.8 C (-45.0 F) |
| 1916 | -41.1 C (-42.0 F) |
| 1917 | -36.7 C (-34.1 F) |
| 1918 | -35.6 C (-32.1 F) |
| 1919 | -27.8 C (-18.0 F) |
| 1920 | -33.9 C (-29.0 F) |
| 1921 | -26.1 C (-15.0 F) |
| 1922 | -36.1 C (-33.0 F) |
| 1923 | -35.0 C (-31.0 F) |
| 1924 | -35.6 C (-32.1 F) |
| 1925 | -30.0 C (-22.0 F) |
| 1926 | -31.7 C (-25.1 F) |
| 1927 | -37.8 C (-36.0 F) |
| 1928 | -35.6 C (-32.1 F) |
| 1948 | n/a |
| 1949 | n/a |
| 1950 | n/a |
| 1951 | n/a |
| 1952 | -28.3 C (-18.9 F) |
| 1953 | -24.4 C (-11.9 F) |
| 1954 | -28.9 C (-20.0 F) |
| 1955 | -28.3 C (-18.9 F) |
| 1956 | -31.1 C (-24.0 F) |
| 1957 | -33.3 C (-27.9 F) |
| 1958 | -29.4 C (-20.9 F) |
| 1959 | -37.8 C (-36.0 F) |
| 1960 | -31.1 C (-24.0 F) |
| 1961 | -29.4 C (-20.9 F) |
| 1962 | -35.6 C (-32.1 F) |
| 1963 | -41.1 C (-42.0 F) |
| 1964 | -39.4 C (-38.9 F) |
| 1965 | -27.8 C (-18.0 F) |
| 1966 | -30.0 C (-22.0 F) |
| 1967 | -34.4 C (-29.9 F) |
| 1968 | -35.0 C (-31.0 F) |
| 1969 | -30.0 C (-22.0 F) |
| 1970 | -35.6 C (-32.1 F) |
| 1971 | -35.6 C (-32.1 F) |
| 1972 | -37.2 C (-35.0 F) |
| 1973 | -35.6 C (-32.1 F) |
| 1974 | -36.7 C (-34.1 F) |
| 1975 | -32.2 C (-26.0 F) |
| 1976 | -33.3 C (-27.9 F) |
| 1977 | -33.3 C (-27.9 F) |
| 1978 | -36.7 C (-34.1 F) |
| 1979 | -35.6 C (-32.1 F) |
| 1980 | -30.6 C (-23.1 F) |
| 1981 | -31.7 C (-25.1 F) |
| 1982 | -36.7 C (-34.1 F) |
| 1983 | -41.1 C (-42.0 F) |
| 1984 | -36.7 C (-34.1 F) |
| 1985 | -33.9 C (-29.0 F) |
| 1986 | -28.9 C (-20.0 F) |
| 1987 | -23.3 C (-9.9 F) |
| 1988 | -28.3 C (-18.9 F) |
| 1989 | -40.6 C (-41.1 F) |
| 1990 | -38.3 C (-36.9 F) |
| 1991 | -29.4 C (-20.9 F) |
| 1992 | -27.8 C (-18.0 F) |
| 1993 | -34.4 C (-29.9 F) |
| 1994 | -33.3 C (-27.9 F) |
| 1995 | -28.3 C (-18.9 F) |
| 1996 | -36.1 C (-33.0 F) |
| 1997 | -33.3 C (-27.9 F) |
| 1998 | -32.2 C (-26.0 F) |
| 1999 | -20.0 C (-4.0 F) |
| 2000 | -29.4 C (-20.9 F) |
| 2001 | -25.6 C (-14.1 F) |
| 2002 | -26.1 C (-15.0 F) |
| 2003 | -32.2 C (-26.0 F) |
| 2004 | -30.0 C (-22.0 F) |
| 2005 | -29.4 C (-20.9 F) |
| 2006 | -32.2 C (-26.0 F) |
| 2007 | -31.1 C (-24.0 F) |
| 2008 | -30.6 C (-23.1 F) |
| 2009 | -29.4 C (-20.9 F) |
| 2010 | -33.3 C (-27.9 F) |
| 2011 | -33.3 C (-27.9 F) |
| 2012 | -25.6 C (-14.1 F) |
| 2013 | -28.9 C (-20.0 F) |
| 2014 | -31.7 C (-25.1 F) |
| 2015 | -26.1 C (-15.0 F) |
| 2016 | -31.1 C (-24.0 F) |
| 2017 | -27.8 C (-18.0 F) |
| 2018 | -28.3 C (-18.9 F) |
| 2019 | -30.6 C (-23.1 F) |
| 2020 | -23.3 C (-9.9 F) |
| 2021 | -31.1 C (-24.0 F) |
| 2022 | -33.9 C (-29.0 F) |
| 2023 | -32.8 C (-27.0 F) |
| 2024 | -37.2 C (-35.0 F) |
| 2025 | -32.8 C (-27.0 F) |
| 2026 | -26.1 C (-15.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1908 | 24.1 mm (0.9 in) |
| 1909 | 40.6 mm (1.6 in) |
| 1910 | 44.5 mm (1.8 in) |
| 1913 | 20.3 mm (0.8 in) |
| 1914 | 52.3 mm (2.1 in) |
| 1915 | 33.0 mm (1.3 in) |
| 1916 | 15.2 mm (0.6 in) |
| 1917 | 18.8 mm (0.7 in) |
| 1918 | 6.6 mm (0.26 in) |
| 1919 | 16.3 mm (0.6 in) |
| 1920 | 26.7 mm (1.1 in) |
| 1921 | 50.8 mm (2.0 in) |
| 1922 | 39.6 mm (1.6 in) |
| 1923 | 56.6 mm (2.2 in) |
| 1924 | 22.6 mm (0.9 in) |
| 1925 | 29.2 mm (1.1 in) |
| 1926 | 48.3 mm (1.9 in) |
| 1927 | 39.1 mm (1.5 in) |
| 1928 | 44.5 mm (1.8 in) |
| 1948 | 12.7 mm (0.5 in) |
| 1949 | 50.8 mm (2.0 in) |
| 1950 | 49.0 mm (1.9 in) |
| 1951 | 29.7 mm (1.2 in) |
| 1952 | 31.0 mm (1.2 in) |
| 1953 | 26.4 mm (1.0 in) |
| 1954 | 27.9 mm (1.1 in) |
| 1955 | 35.1 mm (1.4 in) |
| 1956 | 25.4 mm (1.0 in) |
| 1957 | 58.9 mm (2.3 in) |
| 1958 | 21.1 mm (0.8 in) |
| 1959 | 35.3 mm (1.4 in) |
| 1960 | 29.5 mm (1.2 in) |
| 1961 | 19.1 mm (0.8 in) |
| 1962 | 38.1 mm (1.5 in) |
| 1963 | 36.3 mm (1.4 in) |
| 1964 | 34.0 mm (1.3 in) |
| 1965 | 28.7 mm (1.1 in) |
| 1966 | 31.8 mm (1.3 in) |
| 1967 | 25.4 mm (1.0 in) |
| 1968 | 32.8 mm (1.3 in) |
| 1969 | 30.7 mm (1.2 in) |
| 1970 | 30.5 mm (1.2 in) |
| 1971 | 48.5 mm (1.9 in) |
| 1972 | 36.8 mm (1.4 in) |
| 1973 | 30.5 mm (1.2 in) |
| 1974 | 46.5 mm (1.8 in) |
| 1975 | 29.2 mm (1.1 in) |
| 1976 | 80.0 mm (3.1 in) |
| 1977 | 18.8 mm (0.7 in) |
| 1978 | 47.0 mm (1.9 in) |
| 1979 | 33.0 mm (1.3 in) |
| 1980 | 21.6 mm (0.9 in) |
| 1981 | 38.6 mm (1.5 in) |
| 1982 | 27.4 mm (1.1 in) |
| 1983 | 20.1 mm (0.8 in) |
| 1984 | 31.8 mm (1.3 in) |
| 1985 | 14.7 mm (0.6 in) |
| 1986 | 34.3 mm (1.4 in) |
| 1987 | 21.6 mm (0.9 in) |
| 1988 | 26.7 mm (1.1 in) |
| 1989 | 25.4 mm (1.0 in) |
| 1990 | 27.4 mm (1.1 in) |
| 1991 | 23.9 mm (0.9 in) |
| 1992 | 21.1 mm (0.8 in) |
| 1993 | 30.5 mm (1.2 in) |
| 1994 | 53.3 mm (2.1 in) |
| 1995 | 30.5 mm (1.2 in) |
| 1996 | 47.8 mm (1.9 in) |
| 1997 | 27.2 mm (1.1 in) |
| 1998 | 55.1 mm (2.2 in) |
| 1999 | 31.8 mm (1.3 in) |
| 2000 | 22.1 mm (0.9 in) |
| 2001 | 49.5 mm (1.9 in) |
| 2002 | 27.9 mm (1.1 in) |
| 2003 | 50.8 mm (2.0 in) |
| 2004 | 19.1 mm (0.8 in) |
| 2005 | 45.2 mm (1.8 in) |
| 2006 | 35.6 mm (1.4 in) |
| 2007 | 19.8 mm (0.8 in) |
| 2008 | 50.3 mm (2.0 in) |
| 2009 | 23.6 mm (0.9 in) |
| 2010 | 45.7 mm (1.8 in) |
| 2011 | 45.5 mm (1.8 in) |
| 2012 | 14.7 mm (0.6 in) |
| 2013 | 51.6 mm (2.0 in) |
| 2014 | 27.4 mm (1.1 in) |
| 2015 | 27.2 mm (1.1 in) |
| 2016 | 22.4 mm (0.9 in) |
| 2017 | 29.2 mm (1.1 in) |
| 2018 | 48.0 mm (1.9 in) |
| 2019 | 38.9 mm (1.5 in) |
| 2020 | 17.3 mm (0.7 in) |
| 2021 | 26.9 mm (1.1 in) |
| 2022 | 31.5 mm (1.2 in) |
| 2023 | 23.6 mm (0.9 in) |
| 2024 | 35.1 mm (1.4 in) |
| 2025 | 65.5 mm (2.6 in) |
| 2026 | 17.3 mm (0.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1908 | 24.1 mm (0.9 in) |
| 1909 | 74.4 mm (2.9 in) |
| 1910 | 69.5 mm (2.7 in) |
| 1913 | 35.5 mm (1.4 in) |
| 1914 | 52.3 mm (2.1 in) |
| 1915 | 73.9 mm (2.9 in) |
| 1916 | 24.6 mm (1.0 in) |
| 1917 | 40.4 mm (1.6 in) |
| 1918 | 9.4 mm (0.37 in) |
| 1919 | 19.9 mm (0.8 in) |
| 1920 | 59.7 mm (2.4 in) |
| 1921 | 50.8 mm (2.0 in) |
| 1922 | 53.1 mm (2.1 in) |
| 1923 | 88.8 mm (3.5 in) |
| 1924 | 23.1 mm (0.9 in) |
| 1925 | 32.2 mm (1.3 in) |
| 1926 | 64.9 mm (2.6 in) |
| 1927 | 64.7 mm (2.5 in) |
| 1928 | 41.6 mm (1.6 in) |
| 1948 | 28.2 mm (1.1 in) |
| 1949 | 61.9 mm (2.4 in) |
| 1950 | 72.4 mm (2.9 in) |
| 1951 | 44.7 mm (1.8 in) |
| 1952 | 50.5 mm (2.0 in) |
| 1953 | 52.8 mm (2.1 in) |
| 1954 | 40.4 mm (1.6 in) |
| 1955 | 56.2 mm (2.2 in) |
| 1956 | 48.3 mm (1.9 in) |
| 1957 | 66.3 mm (2.6 in) |
| 1958 | 35.0 mm (1.4 in) |
| 1959 | 35.6 mm (1.4 in) |
| 1960 | 45.8 mm (1.8 in) |
| 1961 | 25.9 mm (1.0 in) |
| 1962 | 85.4 mm (3.4 in) |
| 1963 | 60.5 mm (2.4 in) |
| 1964 | 84.8 mm (3.3 in) |
| 1965 | 53.9 mm (2.1 in) |
| 1966 | 48.6 mm (1.9 in) |
| 1967 | 57.1 mm (2.2 in) |
| 1968 | 47.2 mm (1.9 in) |
| 1969 | 50.3 mm (2.0 in) |
| 1970 | 47.5 mm (1.9 in) |
| 1971 | 64.7 mm (2.5 in) |
| 1972 | 57.4 mm (2.3 in) |
| 1973 | 52.8 mm (2.1 in) |
| 1974 | 51.6 mm (2.0 in) |
| 1975 | 47.1 mm (1.9 in) |
| 1976 | 93.2 mm (3.7 in) |
| 1977 | 37.3 mm (1.5 in) |
| 1978 | 73.7 mm (2.9 in) |
| 1979 | 48.7 mm (1.9 in) |
| 1980 | 30.4 mm (1.2 in) |
| 1981 | 59.2 mm (2.3 in) |
| 1982 | 57.6 mm (2.3 in) |
| 1983 | 32.3 mm (1.3 in) |
| 1984 | 49.8 mm (2.0 in) |
| 1985 | 17.2 mm (0.7 in) |
| 1986 | 67.9 mm (2.7 in) |
| 1987 | 39.6 mm (1.6 in) |
| 1988 | 41.9 mm (1.6 in) |
| 1989 | 47.3 mm (1.9 in) |
| 1990 | 38.3 mm (1.5 in) |
| 1991 | 35.1 mm (1.4 in) |
| 1992 | 42.7 mm (1.7 in) |
| 1993 | 52.6 mm (2.1 in) |
| 1994 | 58.3 mm (2.3 in) |
| 1995 | 59.2 mm (2.3 in) |
| 1996 | 68.1 mm (2.7 in) |
| 1997 | 45.2 mm (1.8 in) |
| 1998 | 64.8 mm (2.6 in) |
| 1999 | 69.9 mm (2.8 in) |
| 2000 | 42.7 mm (1.7 in) |
| 2001 | 68.4 mm (2.7 in) |
| 2002 | 34.0 mm (1.3 in) |
| 2003 | 54.7 mm (2.2 in) |
| 2004 | 24.1 mm (0.9 in) |
| 2005 | 72.1 mm (2.8 in) |
| 2006 | 44.3 mm (1.7 in) |
| 2007 | 38.4 mm (1.5 in) |
| 2008 | 84.9 mm (3.3 in) |
| 2009 | 38.6 mm (1.5 in) |
| 2010 | 55.8 mm (2.2 in) |
| 2011 | 84.7 mm (3.3 in) |
| 2012 | 19.5 mm (0.8 in) |
| 2013 | 66.8 mm (2.6 in) |
| 2014 | 47.0 mm (1.9 in) |
| 2015 | 60.0 mm (2.4 in) |
| 2016 | 42.5 mm (1.7 in) |
| 2017 | 68.5 mm (2.7 in) |
| 2018 | 66.0 mm (2.6 in) |
| 2019 | 75.2 mm (3.0 in) |
| 2020 | 27.0 mm (1.1 in) |
| 2021 | 32.5 mm (1.3 in) |
| 2022 | 46.7 mm (1.8 in) |
| 2023 | 47.2 mm (1.9 in) |
| 2024 | 47.8 mm (1.9 in) |
| 2025 | 67.5 mm (2.7 in) |
| 2026 | 25.7 mm (1.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1908 | 14 days |
| 1909 | 24 days |
| 1910 | 29 days |
| 1913 | 31 days |
| 1914 | 70 days |
| 1915 | 18 days |
| 1916 | 22 days |
| 1917 | 27 days |
| 1918 | 6 days |
| 1919 | 44 days |
| 1920 | 19 days |
| 1921 | 37 days |
| 1922 | 34 days |
| 1923 | 23 days |
| 1924 | 18 days |
| 1925 | 20 days |
| 1926 | 20 days |
| 1927 | 29 days |
| 1928 | 29 days |
| 1948 | 24 days |
| 1949 | 24 days |
| 1950 | 36 days |
| 1951 | 30 days |
| 1952 | 35 days |
| 1953 | 43 days |
| 1954 | 37 days |
| 1955 | 34 days |
| 1956 | 29 days |
| 1957 | 43 days |
| 1958 | 30 days |
| 1959 | 35 days |
| 1960 | 36 days |
| 1961 | 42 days |
| 1962 | 40 days |
| 1963 | 35 days |
| 1964 | 43 days |
| 1965 | 43 days |
| 1966 | 31 days |
| 1967 | 33 days |
| 1968 | 32 days |
| 1969 | 35 days |
| 1970 | 26 days |
| 1971 | 22 days |
| 1972 | 26 days |
| 1973 | 37 days |
| 1974 | 42 days |
| 1975 | 53 days |
| 1976 | 38 days |
| 1977 | 25 days |
| 1978 | 35 days |
| 1979 | 38 days |
| 1980 | 26 days |
| 1981 | 43 days |
| 1982 | 27 days |
| 1983 | 39 days |
| 1984 | 38 days |
| 1985 | 26 days |
| 1986 | 22 days |
| 1987 | 32 days |
| 1988 | 27 days |
| 1989 | 23 days |
| 1990 | 43 days |
| 1991 | 27 days |
| 1992 | 25 days |
| 1993 | 25 days |
| 1994 | 38 days |
| 1995 | 32 days |
| 1996 | 31 days |
| 1997 | 31 days |
| 1998 | 42 days |
| 1999 | 75 days |
| 2000 | 25 days |
| 2001 | 36 days |
| 2002 | 63 days |
| 2003 | 32 days |
| 2004 | 33 days |
| 2005 | 38 days |
| 2006 | 47 days |
| 2007 | 43 days |
| 2008 | 42 days |
| 2009 | 28 days |
| 2010 | 33 days |
| 2011 | 35 days |
| 2012 | 56 days |
| 2013 | 28 days |
| 2014 | 36 days |
| 2015 | 33 days |
| 2016 | 24 days |
| 2017 | 55 days |
| 2018 | 27 days |
| 2019 | 21 days |
| 2020 | 32 days |
| 2021 | 58 days |
| 2022 | 70 days |
| 2023 | 40 days |
| 2024 | 43 days |
| 2025 | 32 days |
| 2026 | 27 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
69 years with a frostAcross 69 years with a frost, the median last spring frost at Upton falls on 21 May and the median first autumn frost on 19 September, which leaves a median of 121 days between them.
In 1993 to 2024 the median growing season was 128 days. That is 21 days more than in 1914 to 1981.
Fitted over all years, the growing season changes by +3.6 days per decade at this station.
| Measure | Median, all years | Earliest period (1914 to 1981) | Recent period (1993 to 2024) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 21 May | 25 May | 17 May | 8 days earlier | -1.5 days per decade |
| First autumn frost | 19 September | 11 September | 22 September | 11 days later | +2.1 days per decade |
| Growing days | 121 days | 107 days | 128 days | 21 days more | +3.6 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
76 years, 1914 to 2025A day with at least 31.7 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 76.5 mm (3.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 31.7 mm (1.2 in) | |
| 5 years | 42.5 mm (1.7 in) | |
| 10 years | 50.1 mm (2.0 in) | |
| 25 years | 60.3 mm (2.4 in) | |
| 50 years | 68.2 mm (2.7 in) | |
| 100 years | 76.5 mm (3.0 in) | Longer than the 76 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, 76 years of values from 1914 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: 80.0 mm (3.1 in) in 1976; 65.5 mm (2.6 in) in 2025; 58.9 mm (2.3 in) in 1957.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Upton, at 1977 and 2011. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1977 ran 0.3 C (0.6 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2011 ran 0.3 C (0.5 F) lower than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1977 | +0.3 | +0.6 | likely | 5 |
| 2011 | -0.3 | -0.5 | 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.
Climate Twins
2008 to 2024 against 1961 to 1990Over 2008 to 2024, Upton had a mean temperature of 7.4 C (45.4 F) and 402.8 mm (15.9 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Ardmore 1 NW (United States, 141 km away), Biddle 8 SW (United States, 126 km away) and Dead Horse Creek (United States, 103 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Ardmore 1 NW | United States | 141 km (88 mi) | 7.8 C (46.0 F) | 403.7 mm (15.9 in) | 1.04 |
| Biddle 8 SW | United States | 126 km (78 mi) | 7.4 C (45.2 F) | 342.3 mm (13.5 in) | 1.05 |
| Dead Horse Creek | United States | 103 km (64 mi) | 7.1 C (44.7 F) | 277.2 mm (10.9 in) | 1.10 |
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).