Altamont Weather Records (USC00420074)
Record envelope, standing records and threshold days for Altamont (USC00420074), Utah, United States, with 74 years of record.
Key Facts for Altamont
- Altamont (USC00420074) is a weather station in Utah, United States at 40.37 latitude and -110.30 longitude, 1,968 m (6,456 ft) above sea level.
- The station reports from 1953 to 2026, 74 years of record.
- 1,464 records set at Altamont still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Altamont tied a daily record high minimum temperature of 7.2 C (45.0 F) on 5 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Utah, United States, 40.37 latitude, -110.30 longitude.
- Elevation: 1,968 m (6,456 ft).
- Period of record: 1953 to 2026, 74 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 | 15.0 C (59.0 F) | -31.1 C (-24.0 F) | 11.7 C (53.1 F) | -18.9 C (-2.0 F) |
| Feb | 20.6 C (69.1 F) | -33.9 C (-29.0 F) | 15.6 C (60.1 F) | -12.8 C (9.0 F) |
| Mar | 27.8 C (82.0 F) | -23.9 C (-11.0 F) | 27.8 C (82.0 F) | -11.7 C (10.9 F) |
| Apr | 30.0 C (86.0 F) | -15.0 C (5.0 F) | 22.2 C (72.0 F) | -12.2 C (10.0 F) |
| May | 32.2 C (90.0 F) | -8.9 C (16.0 F) | 28.3 C (82.9 F) | -2.8 C (27.0 F) |
| Jun | 36.7 C (98.1 F) | -3.9 C (25.0 F) | 30.6 C (87.1 F) | 0.6 C (33.1 F) |
| Jul | 36.1 C (97.0 F) | 1.1 C (34.0 F) | 33.9 C (93.0 F) | 6.1 C (43.0 F) |
| Aug | 35.0 C (95.0 F) | -2.2 C (28.0 F) | 34.4 C (93.9 F) | 7.2 C (45.0 F) |
| Sep | 32.2 C (90.0 F) | -7.2 C (19.0 F) | 27.8 C (82.0 F) | 3.3 C (37.9 F) |
| Oct | 26.7 C (80.1 F) | -21.1 C (-6.0 F) | 24.4 C (75.9 F) | 5.0 C (41.0 F) |
| Nov | 20.6 C (69.1 F) | -22.2 C (-8.0 F) | n/a | n/a |
| Dec | 17.8 C (64.0 F) | -35.6 C (-32.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1953 | 10 |
| 1954 | 31 |
| 1955 | 31 |
| 1956 | 14 |
| 1957 | 12 |
| 1958 | 36 |
| 1959 | 28 |
| 1960 | 24 |
| 1961 | 19 |
| 1962 | 50 |
| 1963 | 20 |
| 1964 | 12 |
| 1966 | 13 |
| 1967 | 23 |
| 1968 | 11 |
| 1969 | 29 |
| 1970 | 15 |
| 1971 | 27 |
| 1972 | 22 |
| 1973 | 21 |
| 1974 | 11 |
| 1975 | 35 |
| 1976 | 17 |
| 1977 | 18 |
| 1978 | 22 |
| 1979 | 26 |
| 1980 | 11 |
| 1981 | 11 |
| 1982 | 19 |
| 1983 | 15 |
| 1984 | 16 |
| 1985 | 28 |
| 1986 | 28 |
| 1987 | 13 |
| 1988 | 18 |
| 1989 | 39 |
| 1990 | 27 |
| 1991 | 21 |
| 1992 | 18 |
| 1993 | 12 |
| 1994 | 9 |
| 1995 | 10 |
| 1996 | 20 |
| 1997 | 19 |
| 1998 | 12 |
| 1999 | 10 |
| 2001 | 19 |
| 2002 | 23 |
| 2003 | 32 |
| 2004 | 18 |
| 2005 | 7 |
| 2006 | 18 |
| 2007 | 15 |
| 2008 | 13 |
| 2009 | 11 |
| 2010 | 13 |
| 2011 | 15 |
| 2012 | 29 |
| 2013 | 36 |
| 2014 | 23 |
| 2015 | 29 |
| 2016 | 16 |
| 2017 | 28 |
| 2018 | 11 |
| 2019 | 24 |
| 2020 | 27 |
| 2021 | 17 |
| 2022 | 26 |
| 2023 | 22 |
| 2024 | 8 |
| 2025 | 24 |
| 2026 | 27 |
All-Time Record Progression
11 new records| Date | Kind | Detail |
|---|---|---|
| 1985-07-05 | Record high maximum temperature | Record high maximum temperature 35.6 C (96.1 F) |
| 1989-02-06 | Record low minimum temperature | Record low minimum temperature -31.7 C (-25.1 F) |
| 1989-02-07 | Record low minimum temperature | Record low minimum temperature -33.9 C (-29.0 F) |
| 1989-07-08 | Record high maximum temperature | Record high maximum temperature 36.1 C (97.0 F) |
| 1990-12-21 | Record low minimum temperature | Record low minimum temperature -35.6 C (-32.1 F) |
| 1990-12-22 | Record low maximum temperature | Record low maximum temperature -23.9 C (-11.0 F) |
| 2002-07-03 | Record high minimum temperature | Record high minimum temperature 20.0 C (68.0 F) |
| 2002-07-15 | Record high minimum temperature | Record high minimum temperature 20.6 C (69.1 F) |
| 2008-02-23 | Record snow depth | Record snow depth 63.5 cm (25.0 in) |
| 2013-06-29 | Record high maximum temperature | Record high maximum temperature 36.7 C (98.1 F) |
| 2019-03-06 | Record snow depth | Record snow depth 68.6 cm (27.0 in) |
Wettest Day of Each Month
Dec: 51.1 mm (2.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 17.3 mm (0.7 in) | 20 January 1962 |
| Feb | 35.6 mm (1.4 in) | 14 February 1968 |
| Mar | 21.6 mm (0.9 in) | 29 March 1993 |
| Apr | 27.7 mm (1.1 in) | 9 April 2013 |
| May | 29.2 mm (1.1 in) | 23 May 2019 |
| Jun | 36.6 mm (1.4 in) | 17 June 1998 |
| Jul | 25.4 mm (1.0 in) | 26 July 1998 |
| Aug | 34.8 mm (1.4 in) | 5 August 1997 |
| Sep | 34.8 mm (1.4 in) | 23 September 2016 |
| Oct | 32.5 mm (1.3 in) | 9 October 1960 |
| Nov | 33.0 mm (1.3 in) | 26 November 1985 |
| Dec | 51.1 mm (2.0 in) | 27 December 1966 |
Period of Record Coverage
1953 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1953 | 204 | 56% | No |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 364 | 99% | Yes |
| 1957 | 364 | 100% | Yes |
| 1958 | 356 | 98% | Yes |
| 1959 | 364 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 304 | 83% | No |
| 1966 | 205 | 56% | No |
| 1967 | 362 | 99% | Yes |
| 1968 | 362 | 99% | Yes |
| 1969 | 361 | 99% | Yes |
| 1970 | 361 | 99% | Yes |
| 1971 | 331 | 91% | Yes |
| 1972 | 359 | 98% | Yes |
| 1973 | 353 | 97% | Yes |
| 1974 | 362 | 99% | Yes |
| 1975 | 341 | 93% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 354 | 97% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 354 | 97% | Yes |
| 1980 | 362 | 99% | Yes |
| 1981 | 364 | 100% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 362 | 99% | Yes |
| 1987 | 364 | 100% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 361 | 99% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 362 | 99% | Yes |
| 1993 | 364 | 100% | Yes |
| 1994 | 335 | 92% | Yes |
| 1995 | 364 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 272 | 75% | No |
| 2001 | 274 | 75% | No |
| 2002 | 356 | 98% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 361 | 99% | Yes |
| 2007 | 359 | 98% | Yes |
| 2008 | 354 | 97% | Yes |
| 2009 | 361 | 99% | Yes |
| 2010 | 356 | 98% | Yes |
| 2011 | 357 | 98% | Yes |
| 2012 | 353 | 96% | Yes |
| 2013 | 359 | 98% | Yes |
| 2014 | 358 | 98% | Yes |
| 2015 | 356 | 98% | Yes |
| 2016 | 319 | 87% | No |
| 2017 | 359 | 98% | Yes |
| 2018 | 365 | 100% | Yes |
| 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 | 365 | 100% | Yes |
| 2026 | 284 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 5 October 2026 | Altamont, US | daily high min (Tie, Provisional) | 7.2 C (45.0 F) | tie | 64 years | 6 of 100 (Routine) |
| 17 September 2026 | Altamont, US | daily high min (Provisional) | 12.8 C (55.0 F) | 1.1 C (2.0 F) | 12 years | 12 of 100 (Routine) |
| 30 August 2026 | Altamont, US | daily rain (Provisional) | 26.9 mm (1.1 in) | 11.7 mm (0.5 in) | 68 years | 51 of 100 (Notable) |
| 29 August 2026 | Altamont, US | daily rain (Provisional) | 9.7 mm (0.38 in) | 1.6 mm (0.06 in) | 55 years | 20 of 100 (Routine) |
| 22 August 2026 | Altamont, US | daily high min (Provisional) | 16.1 C (61.0 F) | 0.5 C (0.9 F) | 65 years | 27 of 100 (Routine) |
| 9 August 2026 | Altamont, US | daily high min (Tie) | 16.1 C (61.0 F) | tie | 43 years | 4 of 100 (Routine) |
| 7 August 2026 | Altamont, US | daily high max | 34.4 C (93.9 F) | 1.1 C (2.0 F) | 43 years | 22 of 100 (Routine) |
| 31 July 2026 | Altamont, US | daily high max (Tie) | 32.8 C (91.0 F) | tie | 63 years | 6 of 100 (Routine) |
| 27 July 2026 | Altamont, US | daily high min (Tie) | 16.7 C (62.1 F) | tie | 23 years | 3 of 100 (Routine) |
| 21 July 2026 | Altamont, US | daily high min | 18.3 C (64.9 F) | 1.1 C (2.0 F) | 63 years | 29 of 100 (Routine) |
| 20 July 2026 | Altamont, US | daily high max (Tie) | 33.3 C (91.9 F) | tie | 63 years | 6 of 100 (Routine) |
| 12 July 2026 | Altamont, US | daily high max (Tie) | 33.9 C (93.0 F) | tie | 68 years | 6 of 100 (Routine) |
| 29 June 2026 | Altamont, US | daily low max | 20.6 C (69.1 F) | 0.5 C (0.9 F) | 67 years | 28 of 100 (Routine) |
| 29 June 2026 | Altamont, US | daily low min | 3.3 C (37.9 F) | 1.1 C (2.0 F) | 3 years | 10 of 100 (Routine) |
| 20 June 2026 | Altamont, US | daily high min (Tie) | 14.4 C (57.9 F) | tie | 8 years | 2 of 100 (Routine) |
| 18 May 2026 | Altamont, US | daily rain | 28.7 mm (1.1 in) | 10.4 mm (0.4 in) | 15 years | 34 of 100 (Routine) |
| 13 May 2026 | Altamont, US | daily high min | 10.6 C (51.1 F) | 1.2 C (2.2 F) | 19 years | 15 of 100 (Routine) |
| 13 May 2026 | Altamont, US | daily high max (Tie) | 27.2 C (81.0 F) | tie | 67 years | 6 of 100 (Routine) |
| 12 May 2026 | Altamont, US | daily high max (Tie) | 28.3 C (82.9 F) | tie | 65 years | 6 of 100 (Routine) |
| 11 May 2026 | Altamont, US | daily high max (Tie) | 26.7 C (80.1 F) | tie | 65 years | 6 of 100 (Routine) |
Climate Trend
62 complete years, 1954 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1954 | 8.1 C | +1.53 C |
| 1955 | 5.9 C | -0.70 C |
| 1956 | 7.2 C | +0.61 C |
| 1957 | 6.4 C | -0.16 C |
| 1958 | 8.3 C | +1.74 C |
| 1959 | 7.4 C | +0.87 C |
| 1960 | 6.7 C | +0.15 C |
| 1961 | 6.9 C | +0.37 C |
| 1962 | 6.8 C | +0.26 C |
| 1963 | 7.8 C | +1.18 C |
| 1967 | 5.7 C | -0.84 C |
| 1968 | 5.4 C | -1.16 C |
| 1969 | 6.4 C | -0.20 C |
| 1970 | 6.3 C | -0.31 C |
| 1972 | 6.6 C | +0.04 C |
| 1973 | 4.8 C | -1.78 C |
| 1974 | 6.0 C | -0.53 C |
| 1976 | 6.1 C | -0.48 C |
| 1977 | 7.3 C | +0.73 C |
| 1978 | 5.6 C | -0.95 C |
| 1979 | 5.5 C | -1.08 C |
| 1980 | 6.5 C | -0.06 C |
| 1981 | 7.9 C | +1.35 C |
| 1982 | 5.6 C | -0.95 C |
| 1983 | 6.4 C | -0.21 C |
| 1984 | 5.3 C | -1.30 C |
| 1985 | 6.0 C | -0.57 C |
| 1986 | 7.4 C | +0.80 C |
| 1987 | 6.8 C | +0.27 C |
| 1988 | 6.4 C | -0.14 C |
| 1989 | 6.3 C | -0.27 C |
| 1990 | 6.7 C | +0.11 C |
| 1991 | 6.0 C | -0.54 C |
| 1992 | 7.0 C | +0.43 C |
| 1993 | 5.0 C | -1.53 C |
| 1995 | 7.0 C | +0.43 C |
| 1996 | 6.9 C | +0.35 C |
| 1997 | 5.6 C | -0.99 C |
| 1998 | 6.7 C | +0.15 C |
| 2002 | 6.7 C | +0.09 C |
| 2003 | 7.4 C | +0.82 C |
| 2004 | 6.6 C | +0.01 C |
| 2005 | 7.0 C | +0.46 C |
| 2006 | 7.1 C | +0.53 C |
| 2007 | 7.2 C | +0.58 C |
| 2008 | 5.7 C | -0.87 C |
| 2009 | 6.3 C | -0.23 C |
| 2010 | 6.0 C | -0.61 C |
| 2011 | 5.3 C | -1.25 C |
| 2012 | 8.6 C | +2.01 C |
| 2013 | 6.0 C | -0.56 C |
| 2014 | 8.1 C | +1.49 C |
| 2015 | 8.0 C | +1.47 C |
| 2017 | 7.7 C | +1.10 C |
| 2018 | 6.9 C | +0.33 C |
| 2019 | 4.9 C | -1.64 C |
| 2020 | 5.7 C | -0.89 C |
| 2021 | 7.1 C | +0.48 C |
| 2022 | 6.2 C | -0.39 C |
| 2023 | 5.1 C | -1.45 C |
| 2024 | 7.2 C | +0.61 C |
| 2025 | 8.0 C | +1.44 C |
The fitted trend in annual mean temperature here over 1954 to 2025 is 0.00 C (-0.11 to 0.11) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.00 F (-0.19 to 0.20) per decade. The slope is a straight line fitted to 62 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.00 C (-0.11 to 0.11) per decade | 0.00 F (-0.19 to 0.20) per decade | 1954 to 2025 | 62 | Not clearly different from zero |
| Mean daily maximum | -0.05 C (-0.17 to 0.07) per decade | -0.1 F (-0.3 to 0.1) per decade | 1954 to 2025 | 62 | Not clearly different from zero |
| Mean daily minimum | 0.1 C (-0.1 to 0.2) per decade | 0.1 F (-0.1 to 0.3) per decade | 1954 to 2025 | 62 | 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
1953 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 36.7 C (98.1 F) | 2013 | 33.3 C (91.9 F) | 72 |
| Coldest night (TNn) | -35.6 C (-32.1 F) | 1990 | -23.9 C (-11.0 F) | 72 |
| Wettest day (Rx1day) | 51.1 mm (2.0 in) | 1966 | 21.8 mm (0.9 in) | 72 |
| Wettest five days (Rx5day) | 84.9 mm (3.3 in) | 2010 | 35.8 mm (1.4 in) | 72 |
| Longest dry spell (CDD) | 94 days | 1974 | 39 days | 72 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1953 | 33.3 C (91.9 F) |
| 1954 | 33.3 C (91.9 F) |
| 1955 | 33.3 C (91.9 F) |
| 1956 | 31.7 C (89.1 F) |
| 1957 | 32.2 C (90.0 F) |
| 1958 | 35.0 C (95.0 F) |
| 1959 | 33.9 C (93.0 F) |
| 1960 | 35.0 C (95.0 F) |
| 1961 | 34.4 C (93.9 F) |
| 1962 | 33.3 C (91.9 F) |
| 1963 | 33.9 C (93.0 F) |
| 1964 | 32.8 C (91.0 F) |
| 1966 | 34.4 C (93.9 F) |
| 1967 | 32.2 C (90.0 F) |
| 1968 | 32.2 C (90.0 F) |
| 1969 | 34.4 C (93.9 F) |
| 1970 | 32.2 C (90.0 F) |
| 1971 | 32.2 C (90.0 F) |
| 1972 | 32.8 C (91.0 F) |
| 1973 | 33.3 C (91.9 F) |
| 1974 | 32.2 C (90.0 F) |
| 1975 | 31.7 C (89.1 F) |
| 1976 | 32.8 C (91.0 F) |
| 1977 | 31.7 C (89.1 F) |
| 1978 | 32.8 C (91.0 F) |
| 1979 | 33.9 C (93.0 F) |
| 1980 | 33.3 C (91.9 F) |
| 1981 | 33.3 C (91.9 F) |
| 1982 | 35.0 C (95.0 F) |
| 1983 | 34.4 C (93.9 F) |
| 1984 | 33.9 C (93.0 F) |
| 1985 | 35.6 C (96.1 F) |
| 1986 | 33.9 C (93.0 F) |
| 1987 | 32.2 C (90.0 F) |
| 1988 | 33.9 C (93.0 F) |
| 1989 | 36.1 C (97.0 F) |
| 1990 | 33.3 C (91.9 F) |
| 1991 | 32.8 C (91.0 F) |
| 1992 | 34.4 C (93.9 F) |
| 1993 | 31.7 C (89.1 F) |
| 1994 | 32.8 C (91.0 F) |
| 1995 | 32.2 C (90.0 F) |
| 1996 | 33.9 C (93.0 F) |
| 1997 | 32.2 C (90.0 F) |
| 1998 | 33.3 C (91.9 F) |
| 1999 | 33.3 C (91.9 F) |
| 2001 | 33.9 C (93.0 F) |
| 2002 | 35.6 C (96.1 F) |
| 2003 | 35.6 C (96.1 F) |
| 2004 | 33.3 C (91.9 F) |
| 2005 | 35.6 C (96.1 F) |
| 2006 | 35.6 C (96.1 F) |
| 2007 | 34.4 C (93.9 F) |
| 2008 | 33.3 C (91.9 F) |
| 2009 | 33.3 C (91.9 F) |
| 2010 | 32.8 C (91.0 F) |
| 2011 | 31.7 C (89.1 F) |
| 2012 | 33.9 C (93.0 F) |
| 2013 | 36.7 C (98.1 F) |
| 2014 | 35.6 C (96.1 F) |
| 2015 | 33.9 C (93.0 F) |
| 2016 | 35.6 C (96.1 F) |
| 2017 | 35.0 C (95.0 F) |
| 2018 | 32.8 C (91.0 F) |
| 2019 | 31.7 C (89.1 F) |
| 2020 | 31.7 C (89.1 F) |
| 2021 | 35.0 C (95.0 F) |
| 2022 | 32.2 C (90.0 F) |
| 2023 | 32.8 C (91.0 F) |
| 2024 | 33.3 C (91.9 F) |
| 2025 | 32.8 C (91.0 F) |
| 2026 | 34.4 C (93.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1953 | -17.2 C (1.0 F) |
| 1954 | -23.9 C (-11.0 F) |
| 1955 | -26.7 C (-16.1 F) |
| 1956 | -23.9 C (-11.0 F) |
| 1957 | -23.9 C (-11.0 F) |
| 1958 | -18.3 C (-0.9 F) |
| 1959 | -22.2 C (-8.0 F) |
| 1960 | -24.4 C (-11.9 F) |
| 1961 | -26.1 C (-15.0 F) |
| 1962 | -29.4 C (-20.9 F) |
| 1963 | -30.6 C (-23.1 F) |
| 1964 | -23.3 C (-9.9 F) |
| 1966 | -21.1 C (-6.0 F) |
| 1967 | -24.4 C (-11.9 F) |
| 1968 | -23.3 C (-9.9 F) |
| 1969 | -23.3 C (-9.9 F) |
| 1970 | -22.8 C (-9.0 F) |
| 1971 | -31.1 C (-24.0 F) |
| 1972 | -26.1 C (-15.0 F) |
| 1973 | -26.1 C (-15.0 F) |
| 1974 | -30.0 C (-22.0 F) |
| 1975 | -23.3 C (-9.9 F) |
| 1976 | -23.9 C (-11.0 F) |
| 1977 | -20.6 C (-5.1 F) |
| 1978 | -30.6 C (-23.1 F) |
| 1979 | -30.0 C (-22.0 F) |
| 1980 | -22.8 C (-9.0 F) |
| 1981 | -20.0 C (-4.0 F) |
| 1982 | -29.4 C (-20.9 F) |
| 1983 | -26.7 C (-16.1 F) |
| 1984 | -30.6 C (-23.1 F) |
| 1985 | -29.4 C (-20.9 F) |
| 1986 | -17.8 C (0.0 F) |
| 1987 | -26.1 C (-15.0 F) |
| 1988 | -25.6 C (-14.1 F) |
| 1989 | -33.9 C (-29.0 F) |
| 1990 | -35.6 C (-32.1 F) |
| 1991 | -22.2 C (-8.0 F) |
| 1992 | -20.6 C (-5.1 F) |
| 1993 | -23.9 C (-11.0 F) |
| 1994 | -22.8 C (-9.0 F) |
| 1995 | -18.3 C (-0.9 F) |
| 1996 | -23.9 C (-11.0 F) |
| 1997 | -21.7 C (-7.1 F) |
| 1998 | -27.8 C (-18.0 F) |
| 1999 | -15.6 C (3.9 F) |
| 2001 | -18.9 C (-2.0 F) |
| 2002 | -22.2 C (-8.0 F) |
| 2003 | -22.2 C (-8.0 F) |
| 2004 | -23.3 C (-9.9 F) |
| 2005 | -22.8 C (-9.0 F) |
| 2006 | -19.4 C (-2.9 F) |
| 2007 | -27.8 C (-18.0 F) |
| 2008 | -23.9 C (-11.0 F) |
| 2009 | -23.9 C (-11.0 F) |
| 2010 | -22.2 C (-8.0 F) |
| 2011 | -30.0 C (-22.0 F) |
| 2012 | -21.1 C (-6.0 F) |
| 2013 | -26.7 C (-16.1 F) |
| 2014 | -27.2 C (-17.0 F) |
| 2015 | -27.2 C (-17.0 F) |
| 2016 | -22.8 C (-9.0 F) |
| 2017 | -27.8 C (-18.0 F) |
| 2018 | -23.3 C (-9.9 F) |
| 2019 | -26.7 C (-16.1 F) |
| 2020 | -24.4 C (-11.9 F) |
| 2021 | -18.9 C (-2.0 F) |
| 2022 | -27.8 C (-18.0 F) |
| 2023 | -27.8 C (-18.0 F) |
| 2024 | -22.8 C (-9.0 F) |
| 2025 | -22.2 C (-8.0 F) |
| 2026 | -18.9 C (-2.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1953 | 25.9 mm (1.0 in) |
| 1954 | 20.8 mm (0.8 in) |
| 1955 | 26.7 mm (1.1 in) |
| 1956 | 16.0 mm (0.6 in) |
| 1957 | 30.0 mm (1.2 in) |
| 1958 | 17.8 mm (0.7 in) |
| 1959 | 18.3 mm (0.7 in) |
| 1960 | 32.5 mm (1.3 in) |
| 1961 | 23.6 mm (0.9 in) |
| 1962 | 21.6 mm (0.9 in) |
| 1963 | 11.4 mm (0.4 in) |
| 1964 | 15.5 mm (0.6 in) |
| 1966 | 51.1 mm (2.0 in) |
| 1967 | 14.5 mm (0.6 in) |
| 1968 | 35.6 mm (1.4 in) |
| 1969 | 21.8 mm (0.9 in) |
| 1970 | 14.2 mm (0.6 in) |
| 1971 | 16.5 mm (0.6 in) |
| 1972 | 17.8 mm (0.7 in) |
| 1973 | 22.9 mm (0.9 in) |
| 1974 | 17.0 mm (0.7 in) |
| 1975 | 20.6 mm (0.8 in) |
| 1976 | 12.4 mm (0.5 in) |
| 1977 | 14.5 mm (0.6 in) |
| 1978 | 26.7 mm (1.1 in) |
| 1979 | 16.8 mm (0.7 in) |
| 1980 | 19.3 mm (0.8 in) |
| 1981 | 22.9 mm (0.9 in) |
| 1982 | 22.9 mm (0.9 in) |
| 1983 | 26.7 mm (1.1 in) |
| 1984 | 21.8 mm (0.9 in) |
| 1985 | 33.0 mm (1.3 in) |
| 1986 | 23.9 mm (0.9 in) |
| 1987 | 18.3 mm (0.7 in) |
| 1988 | 12.2 mm (0.5 in) |
| 1989 | 19.8 mm (0.8 in) |
| 1990 | 21.8 mm (0.9 in) |
| 1991 | 19.3 mm (0.8 in) |
| 1992 | 13.0 mm (0.5 in) |
| 1993 | 21.6 mm (0.9 in) |
| 1994 | 24.9 mm (1.0 in) |
| 1995 | 29.0 mm (1.1 in) |
| 1996 | 15.2 mm (0.6 in) |
| 1997 | 34.8 mm (1.4 in) |
| 1998 | 36.6 mm (1.4 in) |
| 1999 | 25.4 mm (1.0 in) |
| 2001 | 17.8 mm (0.7 in) |
| 2002 | 14.7 mm (0.6 in) |
| 2003 | 13.2 mm (0.5 in) |
| 2004 | 25.4 mm (1.0 in) |
| 2005 | 20.8 mm (0.8 in) |
| 2006 | 24.9 mm (1.0 in) |
| 2007 | 21.3 mm (0.8 in) |
| 2008 | 25.4 mm (1.0 in) |
| 2009 | 22.6 mm (0.9 in) |
| 2010 | 49.5 mm (1.9 in) |
| 2011 | 22.1 mm (0.9 in) |
| 2012 | 13.0 mm (0.5 in) |
| 2013 | 27.7 mm (1.1 in) |
| 2014 | 25.4 mm (1.0 in) |
| 2015 | 25.9 mm (1.0 in) |
| 2016 | 34.8 mm (1.4 in) |
| 2017 | 19.6 mm (0.8 in) |
| 2018 | 27.7 mm (1.1 in) |
| 2019 | 29.2 mm (1.1 in) |
| 2020 | 31.0 mm (1.2 in) |
| 2021 | 27.2 mm (1.1 in) |
| 2022 | 16.8 mm (0.7 in) |
| 2023 | 14.2 mm (0.6 in) |
| 2024 | 27.4 mm (1.1 in) |
| 2025 | 19.1 mm (0.8 in) |
| 2026 | 28.7 mm (1.1 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1953 | 25.9 mm (1.0 in) |
| 1954 | 33.3 mm (1.3 in) |
| 1955 | 35.8 mm (1.4 in) |
| 1956 | 22.4 mm (0.9 in) |
| 1957 | 43.7 mm (1.7 in) |
| 1958 | 25.2 mm (1.0 in) |
| 1959 | 26.9 mm (1.1 in) |
| 1960 | 42.4 mm (1.7 in) |
| 1961 | 33.8 mm (1.3 in) |
| 1962 | 30.5 mm (1.2 in) |
| 1963 | 17.8 mm (0.7 in) |
| 1964 | 31.0 mm (1.2 in) |
| 1966 | 82.9 mm (3.3 in) |
| 1967 | 47.5 mm (1.9 in) |
| 1968 | 44.7 mm (1.8 in) |
| 1969 | 57.1 mm (2.2 in) |
| 1970 | 42.2 mm (1.7 in) |
| 1971 | 44.4 mm (1.7 in) |
| 1972 | 26.7 mm (1.1 in) |
| 1973 | 24.2 mm (1.0 in) |
| 1974 | 28.2 mm (1.1 in) |
| 1975 | 49.2 mm (1.9 in) |
| 1976 | 25.7 mm (1.0 in) |
| 1977 | 20.9 mm (0.8 in) |
| 1978 | 42.2 mm (1.7 in) |
| 1979 | 24.9 mm (1.0 in) |
| 1980 | 36.3 mm (1.4 in) |
| 1981 | 37.1 mm (1.5 in) |
| 1982 | 49.8 mm (2.0 in) |
| 1983 | 33.3 mm (1.3 in) |
| 1984 | 27.9 mm (1.1 in) |
| 1985 | 43.4 mm (1.7 in) |
| 1986 | 34.1 mm (1.3 in) |
| 1987 | 36.8 mm (1.4 in) |
| 1988 | 17.5 mm (0.7 in) |
| 1989 | 33.2 mm (1.3 in) |
| 1990 | 28.3 mm (1.1 in) |
| 1991 | 47.2 mm (1.9 in) |
| 1992 | 18.5 mm (0.7 in) |
| 1993 | 36.6 mm (1.4 in) |
| 1994 | 48.5 mm (1.9 in) |
| 1995 | 63.2 mm (2.5 in) |
| 1996 | 29.4 mm (1.2 in) |
| 1997 | 39.0 mm (1.5 in) |
| 1998 | 41.9 mm (1.6 in) |
| 1999 | 49.3 mm (1.9 in) |
| 2001 | 20.6 mm (0.8 in) |
| 2002 | 33.5 mm (1.3 in) |
| 2003 | 23.8 mm (0.9 in) |
| 2004 | 46.0 mm (1.8 in) |
| 2005 | 37.8 mm (1.5 in) |
| 2006 | 44.2 mm (1.7 in) |
| 2007 | 24.6 mm (1.0 in) |
| 2008 | 32.0 mm (1.3 in) |
| 2009 | 29.7 mm (1.2 in) |
| 2010 | 84.9 mm (3.3 in) |
| 2011 | 38.1 mm (1.5 in) |
| 2012 | 18.3 mm (0.7 in) |
| 2013 | 33.9 mm (1.3 in) |
| 2014 | 50.5 mm (2.0 in) |
| 2015 | 35.8 mm (1.4 in) |
| 2016 | 53.9 mm (2.1 in) |
| 2017 | 32.0 mm (1.3 in) |
| 2018 | 43.9 mm (1.7 in) |
| 2019 | 58.9 mm (2.3 in) |
| 2020 | 45.5 mm (1.8 in) |
| 2021 | 39.7 mm (1.6 in) |
| 2022 | 24.7 mm (1.0 in) |
| 2023 | 20.7 mm (0.8 in) |
| 2024 | 36.1 mm (1.4 in) |
| 2025 | 26.1 mm (1.0 in) |
| 2026 | 40.5 mm (1.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1953 | 46 days |
| 1954 | 34 days |
| 1955 | 85 days |
| 1956 | 45 days |
| 1957 | 31 days |
| 1958 | 69 days |
| 1959 | 56 days |
| 1960 | 45 days |
| 1961 | 56 days |
| 1962 | 62 days |
| 1963 | 30 days |
| 1964 | 43 days |
| 1966 | 24 days |
| 1967 | 30 days |
| 1968 | 44 days |
| 1969 | 38 days |
| 1970 | 28 days |
| 1971 | 40 days |
| 1972 | 62 days |
| 1973 | 30 days |
| 1974 | 94 days |
| 1975 | 53 days |
| 1976 | 89 days |
| 1977 | 30 days |
| 1978 | 32 days |
| 1979 | 58 days |
| 1980 | 37 days |
| 1981 | 41 days |
| 1982 | 28 days |
| 1983 | 17 days |
| 1984 | 38 days |
| 1985 | 31 days |
| 1986 | 36 days |
| 1987 | 48 days |
| 1988 | 30 days |
| 1989 | 34 days |
| 1990 | 36 days |
| 1991 | 40 days |
| 1992 | 35 days |
| 1993 | 35 days |
| 1994 | 47 days |
| 1995 | 40 days |
| 1996 | 41 days |
| 1997 | 32 days |
| 1998 | 39 days |
| 1999 | 44 days |
| 2001 | 35 days |
| 2002 | 59 days |
| 2003 | 33 days |
| 2004 | 37 days |
| 2005 | 29 days |
| 2006 | 23 days |
| 2007 | 57 days |
| 2008 | 36 days |
| 2009 | 45 days |
| 2010 | 19 days |
| 2011 | 19 days |
| 2012 | 59 days |
| 2013 | 37 days |
| 2014 | 29 days |
| 2015 | 43 days |
| 2016 | 33 days |
| 2017 | 39 days |
| 2018 | 45 days |
| 2019 | 28 days |
| 2020 | 71 days |
| 2021 | 43 days |
| 2022 | 53 days |
| 2023 | 36 days |
| 2024 | 42 days |
| 2025 | 38 days |
| 2026 | 52 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
62 years with a frostAcross 62 years with a frost, the median last spring frost at Altamont falls on 31 May and the median first autumn frost on 22 September, which leaves a median of 118 days between them.
In 1991 to 2025 the median growing season was 119 days. That is 4 days more than in 1954 to 1988.
Fitted over all years, the growing season changes by +1.1 days per decade at this station.
| Measure | Median, all years | Earliest period (1954 to 1988) | Recent period (1991 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 31 May | 31 May | 29 May | 2 days earlier | 0.0 days per decade |
| First autumn frost | 22 September | 21 September | 23 September | 2 days later | +1.1 days per decade |
| Growing days | 118 days | 115 days | 119 days | 4 days more | +1.1 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
64 years, 1954 to 2025A day with at least 21.4 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 43.1 mm (1.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 21.4 mm (0.8 in) | |
| 5 years | 27.7 mm (1.1 in) | |
| 10 years | 31.7 mm (1.2 in) | |
| 25 years | 36.5 mm (1.4 in) | |
| 50 years | 39.9 mm (1.6 in) | |
| 100 years | 43.1 mm (1.7 in) | Longer than the 64 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, 64 years of values from 1954 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: 49.5 mm (1.9 in) in 2010; 36.6 mm (1.4 in) in 1998; 35.6 mm (1.4 in) in 1968.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2010 to 2025 against 1961 to 1990Over 2010 to 2025, Altamont had a mean temperature of 6.7 C (44.1 F) and 224.8 mm (8.9 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Pavillion (United States, 347 km away), Idaho Falls FAA AP (United States, 380 km away) and Diversion Dam (United States, 337 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Pavillion | United States | 347 km (216 mi) | 6.8 C (44.3 F) | 185.3 mm (7.3 in) | 0.70 |
| Idaho Falls FAA AP | United States | 380 km (236 mi) | 6.5 C (43.6 F) | 276.6 mm (10.9 in) | 0.73 |
| Diversion Dam | United States | 337 km (209 mi) | 6.9 C (44.4 F) | 237.4 mm (9.3 in) | 0.74 |
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 (2026-10-14).