Bozeman Gallatin Fld AP Weather Records (USW00024132)
Record envelope, standing records and threshold days for Bozeman Gallatin Fld AP (USW00024132), Montana, United States, with 86 years of record.
Key Facts for Bozeman Gallatin Fld AP
- Bozeman Gallatin Fld AP (USW00024132) is a weather station in Montana, United States at 45.79 latitude and -111.16 longitude, 1,351 m (4,431 ft) above sea level.
- The station reports from 1941 to 2026, 86 years of record.
- 1,464 records set at Bozeman Gallatin Fld AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Bozeman Gallatin Fld AP set a daily record snow depth of 15.2 cm (6.0 in) on 12 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Montana, United States, 45.79 latitude, -111.16 longitude.
- Elevation: 1,351 m (4,431 ft).
- Period of record: 1941 to 2026, 86 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
17 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 15.6 C (60.1 F) | -43.3 C (-45.9 F) | 13.9 C (57.0 F) | -20.0 C (-4.0 F) |
| Feb | 18.9 C (66.0 F) | -41.7 C (-43.1 F) | 16.1 C (61.0 F) | -17.8 C (0.0 F) |
| Mar | 26.1 C (79.0 F) | -39.3 C (-38.7 F) | 26.1 C (79.0 F) | -12.8 C (9.0 F) |
| Apr | 30.0 C (86.0 F) | -20.6 C (-5.1 F) | 24.4 C (75.9 F) | -8.9 C (16.0 F) |
| May | 33.3 C (91.9 F) | -10.0 C (14.0 F) | 33.3 C (91.9 F) | -6.7 C (19.9 F) |
| Jun | 37.8 C (100.0 F) | -3.3 C (26.1 F) | 31.1 C (88.0 F) | -0.6 C (30.9 F) |
| Jul | 41.1 C (106.0 F) | -1.1 C (30.0 F) | 41.1 C (106.0 F) | 8.3 C (46.9 F) |
| Aug | 39.4 C (102.9 F) | -2.8 C (27.0 F) | 38.9 C (102.0 F) | 3.9 C (39.0 F) |
| Sep | 37.8 C (100.0 F) | -9.4 C (15.1 F) | 30.0 C (86.0 F) | -0.6 C (30.9 F) |
| Oct | 31.7 C (89.1 F) | -28.8 C (-19.8 F) | 29.4 C (84.9 F) | -6.1 C (21.0 F) |
| Nov | 24.4 C (75.9 F) | -37.8 C (-36.0 F) | n/a | n/a |
| Dec | 18.9 C (66.0 F) | -43.3 C (-45.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1941 | 12 |
| 1942 | 12 |
| 1943 | 25 |
| 1944 | 6 |
| 1945 | 11 |
| 1946 | 13 |
| 1947 | 10 |
| 1948 | 15 |
| 1949 | 26 |
| 1950 | 24 |
| 1951 | 16 |
| 1952 | 7 |
| 1953 | 16 |
| 1954 | 23 |
| 1955 | 22 |
| 1956 | 10 |
| 1957 | 10 |
| 1958 | 9 |
| 1959 | 14 |
| 1960 | 20 |
| 1961 | 24 |
| 1962 | 32 |
| 1963 | 19 |
| 1964 | 16 |
| 1965 | 28 |
| 1966 | 22 |
| 1967 | 19 |
| 1968 | 15 |
| 1969 | 29 |
| 1970 | 18 |
| 1971 | 24 |
| 1972 | 34 |
| 1973 | 22 |
| 1974 | 18 |
| 1975 | 22 |
| 1976 | 10 |
| 1977 | 17 |
| 1978 | 18 |
| 1979 | 18 |
| 1980 | 18 |
| 1981 | 14 |
| 1982 | 16 |
| 1983 | 32 |
| 1984 | 14 |
| 1985 | 33 |
| 1986 | 18 |
| 1987 | 17 |
| 1988 | 19 |
| 1989 | 23 |
| 1990 | 18 |
| 1991 | 16 |
| 1992 | 12 |
| 1993 | 12 |
| 1994 | 12 |
| 1995 | 20 |
| 1996 | 21 |
| 1997 | 15 |
| 1998 | 10 |
| 1999 | 12 |
| 2000 | 11 |
| 2001 | 14 |
| 2002 | 15 |
| 2003 | 27 |
| 2004 | 6 |
| 2005 | 17 |
| 2006 | 17 |
| 2007 | 42 |
| 2008 | 15 |
| 2009 | 19 |
| 2010 | 9 |
| 2011 | 9 |
| 2012 | 16 |
| 2013 | 6 |
| 2015 | 17 |
| 2016 | 7 |
| 2017 | 6 |
| 2018 | 8 |
| 2019 | 16 |
| 2020 | 20 |
| 2021 | 29 |
| 2022 | 17 |
| 2023 | 9 |
| 2024 | 15 |
| 2025 | 21 |
| 2026 | 18 |
All-Time Record Progression
3 new records| Date | Kind | Detail |
|---|---|---|
| 1983-12-21 | Record low maximum temperature | Record low maximum temperature -30.0 C (-22.0 F) |
| 2007-07-06 | Record high maximum temperature | Record high maximum temperature 41.1 C (106.0 F) |
| 2022-12-22 | Record low maximum temperature | Record low maximum temperature -31.0 C (-23.8 F) |
Wettest Day of Each Month
Jun: 54.4 mm (2.1 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 18.0 mm (0.7 in) | 14 January 2003 |
| Feb | 15.7 mm (0.6 in) | 16 February 1991 |
| Mar | 23.4 mm (0.9 in) | 5 March 2026 |
| Apr | 25.9 mm (1.0 in) | 30 April 1951 |
| May | 48.5 mm (1.9 in) | 25 May 1980 |
| Jun | 54.4 mm (2.1 in) | 25 June 1969 |
| Jul | 37.8 mm (1.5 in) | 13 July 1962 |
| Aug | 44.7 mm (1.8 in) | 1 August 1948 |
| Sep | 30.7 mm (1.2 in) | 2 September 1944 |
| Oct | 32.8 mm (1.3 in) | 4 October 1992 |
| Nov | 23.4 mm (0.9 in) | 8 November 2010 |
| Dec | 26.4 mm (1.0 in) | 23 December 1955 |
Period of Record Coverage
1941 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1941 | 230 | 63% | No |
| 1942 | 361 | 99% | Yes |
| 1943 | 362 | 99% | Yes |
| 1944 | 362 | 99% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 364 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 363 | 99% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | 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 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 364 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 365 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 364 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 364 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 362 | 99% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 364 | 100% | Yes |
| 2014 | 1 | 0% | No |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 364 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 364 | 100% | Yes |
| 2026 | 285 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 12 October 2026 | Bozeman Gallatin Fld AP, US | daily snow depth (Provisional) | 15.2 cm (6.0 in) | 7.6 cm (3.0 in) | 44 years | 34 of 100 (Routine) |
| 11 October 2026 | Bozeman Gallatin Fld AP, US | daily snowfall (Provisional) | 17.5 cm (6.9 in) | 13.9 cm (5.5 in) | 71 years | 66 of 100 (Major) |
| 11 October 2026 | Bozeman Gallatin Fld AP, US | daily rain (Provisional) | 20.1 mm (0.8 in) | 0.5 mm (0.02 in) | 0 years | 9 of 100 (Routine) |
| 11 October 2026 | Bozeman Gallatin Fld AP, US | daily snow depth (Tie, Provisional) | 2.5 cm (1.0 in) | tie | 71 years | 7 of 100 (Routine) |
| 10 October 2026 | Bozeman Gallatin Fld AP, US | daily rain (Provisional) | 7.1 mm (0.28 in) | 2.0 mm (0.08 in) | 23 years | 18 of 100 (Routine) |
| 9 October 2026 | Bozeman Gallatin Fld AP, US | daily high max (Provisional) | 29.4 C (84.9 F) | 0.5 C (0.9 F) | 1 year | 8 of 100 (Routine) |
| 19 September 2026 | Bozeman Gallatin Fld AP, US | daily high min (Provisional) | 11.7 C (53.1 F) | 1.7 C (3.1 F) | 63 years | 30 of 100 (Routine) |
| 19 September 2026 | Bozeman Gallatin Fld AP, US | daily rain (Provisional) | 15.0 mm (0.6 in) | 3.3 mm (0.13 in) | 21 years | 20 of 100 (Routine) |
| 22 August 2026 | Bozeman Gallatin Fld AP, US | daily high min (Tie, Provisional) | 15.6 C (60.1 F) | tie | 23 years | 3 of 100 (Routine) |
| 14 August 2026 | Bozeman Gallatin Fld AP, US | daily rain | 13.5 mm (0.5 in) | 2.1 mm (0.08 in) | 16 years | 17 of 100 (Routine) |
| 1 August 2026 | Bozeman Gallatin Fld AP, US | daily high max | 38.9 C (102.0 F) | 1.7 C (3.1 F) | 17 years | 16 of 100 (Routine) |
| 22 July 2026 | Bozeman Gallatin Fld AP, US | daily high min | 17.8 C (64.0 F) | 1.1 C (2.0 F) | 20 years | 17 of 100 (Routine) |
| 12 July 2026 | Bozeman Gallatin Fld AP, US | all-time high max (Tie) | 41.1 C (106.0 F) | tie | 19 years | 8 of 100 (Routine) |
| 11 July 2026 | Bozeman Gallatin Fld AP, US | daily high max | 37.8 C (100.0 F) | 1.7 C (3.1 F) | 24 years | 18 of 100 (Routine) |
| 29 June 2026 | Bozeman Gallatin Fld AP, US | daily low max (Tie) | 12.8 C (55.0 F) | tie | 57 years | 6 of 100 (Routine) |
| 28 June 2026 | Bozeman Gallatin Fld AP, US | daily rain | 20.3 mm (0.8 in) | 4.6 mm (0.18 in) | 72 years | 20 of 100 (Routine) |
| 28 June 2026 | Bozeman Gallatin Fld AP, US | daily low max | 11.1 C (52.0 F) | 1.1 C (2.0 F) | 72 years | 30 of 100 (Routine) |
| 28 May 2026 | Bozeman Gallatin Fld AP, US | daily high max (Tie) | 30.6 C (87.1 F) | tie | 68 years | 7 of 100 (Routine) |
| 16 May 2026 | Bozeman Gallatin Fld AP, US | daily snowfall | 0.3 cm (0.1 in) | 0.3 cm (0.1 in) | 84 years | 20 of 100 (Routine) |
| 13 May 2026 | Bozeman Gallatin Fld AP, US | monthly high max (Tie) | 33.3 C (91.9 F) | tie | 71 years | 9 of 100 (Routine) |
Climate Trend
83 complete years, 1942 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1942 | 4.5 C | -1.27 C |
| 1943 | 4.8 C | -0.91 C |
| 1944 | 5.2 C | -0.50 C |
| 1945 | 5.8 C | +0.08 C |
| 1946 | 6.0 C | +0.32 C |
| 1947 | 5.6 C | -0.10 C |
| 1948 | 4.5 C | -1.26 C |
| 1949 | 4.7 C | -1.01 C |
| 1950 | 4.6 C | -1.12 C |
| 1951 | 4.0 C | -1.70 C |
| 1952 | 4.9 C | -0.87 C |
| 1953 | 7.3 C | +1.57 C |
| 1954 | 6.1 C | +0.40 C |
| 1955 | 4.1 C | -1.65 C |
| 1956 | 5.4 C | -0.36 C |
| 1957 | 5.3 C | -0.42 C |
| 1958 | 6.5 C | +0.75 C |
| 1959 | 5.2 C | -0.48 C |
| 1960 | 5.0 C | -0.70 C |
| 1961 | 6.4 C | +0.64 C |
| 1962 | 5.2 C | -0.56 C |
| 1963 | 6.4 C | +0.64 C |
| 1964 | 4.9 C | -0.86 C |
| 1965 | 5.0 C | -0.76 C |
| 1966 | 6.4 C | +0.70 C |
| 1967 | 6.5 C | +0.81 C |
| 1968 | 4.6 C | -1.08 C |
| 1969 | 4.1 C | -1.58 C |
| 1970 | 5.5 C | -0.20 C |
| 1971 | 5.3 C | -0.45 C |
| 1972 | 5.5 C | -0.18 C |
| 1973 | 5.6 C | -0.13 C |
| 1974 | 6.0 C | +0.26 C |
| 1975 | 3.7 C | -2.05 C |
| 1976 | 6.0 C | +0.25 C |
| 1977 | 5.8 C | +0.04 C |
| 1978 | 4.3 C | -1.38 C |
| 1979 | 4.7 C | -1.02 C |
| 1980 | 5.8 C | +0.06 C |
| 1981 | 7.2 C | +1.44 C |
| 1982 | 4.4 C | -1.28 C |
| 1983 | 6.1 C | +0.35 C |
| 1984 | 6.0 C | +0.30 C |
| 1985 | 3.9 C | -1.79 C |
| 1986 | 6.0 C | +0.27 C |
| 1987 | 6.7 C | +0.98 C |
| 1988 | 6.8 C | +1.05 C |
| 1989 | 5.1 C | -0.66 C |
| 1990 | 6.3 C | +0.61 C |
| 1991 | 6.6 C | +0.92 C |
| 1992 | 6.5 C | +0.79 C |
| 1993 | 4.1 C | -1.66 C |
| 1994 | 6.6 C | +0.84 C |
| 1995 | 5.7 C | +0.02 C |
| 1996 | 4.3 C | -1.38 C |
| 1997 | 4.7 C | -1.02 C |
| 1998 | 6.3 C | +0.58 C |
| 1999 | 6.7 C | +0.99 C |
| 2000 | 5.7 C | -0.07 C |
| 2001 | 5.7 C | -0.05 C |
| 2002 | 4.9 C | -0.82 C |
| 2003 | 6.4 C | +0.63 C |
| 2004 | 5.9 C | +0.17 C |
| 2005 | 5.8 C | +0.09 C |
| 2006 | 6.7 C | +0.94 C |
| 2007 | 8.3 C | +2.53 C |
| 2008 | 6.8 C | +1.07 C |
| 2009 | 6.6 C | +0.92 C |
| 2010 | 6.3 C | +0.57 C |
| 2011 | 5.9 C | +0.16 C |
| 2012 | 7.2 C | +1.46 C |
| 2013 | 6.0 C | +0.30 C |
| 2015 | 7.3 C | +1.54 C |
| 2016 | 6.9 C | +1.21 C |
| 2017 | 5.9 C | +0.18 C |
| 2018 | 5.8 C | +0.03 C |
| 2019 | 4.4 C | -1.34 C |
| 2020 | 6.7 C | +0.95 C |
| 2021 | 7.2 C | +1.47 C |
| 2022 | 5.4 C | -0.37 C |
| 2023 | 6.2 C | +0.46 C |
| 2024 | 7.3 C | +1.53 C |
| 2025 | 7.0 C | +1.28 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1942 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.5) 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 | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.2 to 0.5) per decade | 1942 to 2025 | 83 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.2 to 0.5) per decade | 1942 to 2025 | 83 | Rise |
| Mean daily minimum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.1 to 0.4) per decade | 1942 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
1941 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.1 C (106.0 F) | 2007 | 36.7 C (98.1 F) | 86 |
| Coldest night (TNn) | -43.3 C (-45.9 F) | 1957 | -34.1 C (-29.4 F) | 86 |
| Wettest day (Rx1day) | 54.4 mm (2.1 in) | 1969 | 24.0 mm (0.9 in) | 86 |
| Wettest five days (Rx5day) | 109.1 mm (4.3 in) | 1969 | 42.2 mm (1.7 in) | 85 |
| Longest dry spell (CDD) | 53 days | 2020 | 28 days | 86 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1941 | 37.2 C (99.0 F) |
| 1942 | 34.4 C (93.9 F) |
| 1943 | 36.1 C (97.0 F) |
| 1944 | 33.9 C (93.0 F) |
| 1945 | 37.8 C (100.0 F) |
| 1946 | 35.6 C (96.1 F) |
| 1947 | 35.6 C (96.1 F) |
| 1948 | 34.4 C (93.9 F) |
| 1949 | 36.7 C (98.1 F) |
| 1950 | 35.0 C (95.0 F) |
| 1951 | 36.1 C (97.0 F) |
| 1952 | 34.4 C (93.9 F) |
| 1953 | 37.8 C (100.0 F) |
| 1954 | 36.7 C (98.1 F) |
| 1955 | 37.2 C (99.0 F) |
| 1956 | 34.4 C (93.9 F) |
| 1957 | 36.1 C (97.0 F) |
| 1958 | 34.4 C (93.9 F) |
| 1959 | 37.2 C (99.0 F) |
| 1960 | 38.9 C (102.0 F) |
| 1961 | 39.4 C (102.9 F) |
| 1962 | 34.4 C (93.9 F) |
| 1963 | 37.2 C (99.0 F) |
| 1964 | 37.2 C (99.0 F) |
| 1965 | 35.6 C (96.1 F) |
| 1966 | 37.8 C (100.0 F) |
| 1967 | 35.6 C (96.1 F) |
| 1968 | 35.6 C (96.1 F) |
| 1969 | 38.9 C (102.0 F) |
| 1970 | 38.9 C (102.0 F) |
| 1971 | 36.7 C (98.1 F) |
| 1972 | 35.0 C (95.0 F) |
| 1973 | 37.8 C (100.0 F) |
| 1974 | 36.7 C (98.1 F) |
| 1975 | 35.6 C (96.1 F) |
| 1976 | 36.7 C (98.1 F) |
| 1977 | 36.1 C (97.0 F) |
| 1978 | 36.1 C (97.0 F) |
| 1979 | 36.7 C (98.1 F) |
| 1980 | 34.4 C (93.9 F) |
| 1981 | 36.7 C (98.1 F) |
| 1982 | 35.6 C (96.1 F) |
| 1983 | 37.8 C (100.0 F) |
| 1984 | 36.7 C (98.1 F) |
| 1985 | 36.7 C (98.1 F) |
| 1986 | 35.0 C (95.0 F) |
| 1987 | 35.6 C (96.1 F) |
| 1988 | 36.1 C (97.0 F) |
| 1989 | 38.9 C (102.0 F) |
| 1990 | 37.8 C (100.0 F) |
| 1991 | 37.2 C (99.0 F) |
| 1992 | 35.6 C (96.1 F) |
| 1993 | 33.9 C (93.0 F) |
| 1994 | 36.7 C (98.1 F) |
| 1995 | 36.1 C (97.0 F) |
| 1996 | 36.1 C (97.0 F) |
| 1997 | 31.7 C (89.1 F) |
| 1998 | 36.7 C (98.1 F) |
| 1999 | 36.7 C (98.1 F) |
| 2000 | 37.2 C (99.0 F) |
| 2001 | 37.8 C (100.0 F) |
| 2002 | 38.9 C (102.0 F) |
| 2003 | 38.3 C (100.9 F) |
| 2004 | 35.0 C (95.0 F) |
| 2005 | 36.1 C (97.0 F) |
| 2006 | 38.3 C (100.9 F) |
| 2007 | 41.1 C (106.0 F) |
| 2008 | 38.9 C (102.0 F) |
| 2009 | 38.3 C (100.9 F) |
| 2010 | 38.3 C (100.9 F) |
| 2011 | 36.1 C (97.0 F) |
| 2012 | 37.2 C (99.0 F) |
| 2013 | 36.1 C (97.0 F) |
| 2014 | -13.8 C (7.2 F) |
| 2015 | 37.2 C (99.0 F) |
| 2016 | 36.7 C (98.1 F) |
| 2017 | 36.1 C (97.0 F) |
| 2018 | 38.9 C (102.0 F) |
| 2019 | 35.6 C (96.1 F) |
| 2020 | 37.8 C (100.0 F) |
| 2021 | 37.8 C (100.0 F) |
| 2022 | 37.8 C (100.0 F) |
| 2023 | 36.7 C (98.1 F) |
| 2024 | 38.3 C (100.9 F) |
| 2025 | 36.1 C (97.0 F) |
| 2026 | 41.1 C (106.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1941 | -36.7 C (-34.1 F) |
| 1942 | -41.1 C (-42.0 F) |
| 1943 | -36.1 C (-33.0 F) |
| 1944 | -35.0 C (-31.0 F) |
| 1945 | -31.1 C (-24.0 F) |
| 1946 | -31.7 C (-25.1 F) |
| 1947 | -36.7 C (-34.1 F) |
| 1948 | -36.1 C (-33.0 F) |
| 1949 | -41.7 C (-43.1 F) |
| 1950 | -33.9 C (-29.0 F) |
| 1951 | -40.0 C (-40.0 F) |
| 1952 | -32.2 C (-26.0 F) |
| 1953 | -23.9 C (-11.0 F) |
| 1954 | -36.7 C (-34.1 F) |
| 1955 | -35.6 C (-32.1 F) |
| 1956 | -38.9 C (-38.0 F) |
| 1957 | -43.3 C (-45.9 F) |
| 1958 | -25.6 C (-14.1 F) |
| 1959 | -37.8 C (-36.0 F) |
| 1960 | -33.3 C (-27.9 F) |
| 1961 | -31.7 C (-25.1 F) |
| 1962 | -42.8 C (-45.0 F) |
| 1963 | -41.7 C (-43.1 F) |
| 1964 | -35.0 C (-31.0 F) |
| 1965 | -31.1 C (-24.0 F) |
| 1966 | -31.1 C (-24.0 F) |
| 1967 | -32.8 C (-27.0 F) |
| 1968 | -40.6 C (-41.1 F) |
| 1969 | -42.2 C (-44.0 F) |
| 1970 | -34.4 C (-29.9 F) |
| 1971 | -32.2 C (-26.0 F) |
| 1972 | -39.4 C (-38.9 F) |
| 1973 | -37.2 C (-35.0 F) |
| 1974 | -37.2 C (-35.0 F) |
| 1975 | -35.0 C (-31.0 F) |
| 1976 | -32.8 C (-27.0 F) |
| 1977 | -32.8 C (-27.0 F) |
| 1978 | -39.4 C (-38.9 F) |
| 1979 | -38.9 C (-38.0 F) |
| 1980 | -38.3 C (-36.9 F) |
| 1981 | -39.4 C (-38.9 F) |
| 1982 | -36.1 C (-33.0 F) |
| 1983 | -43.3 C (-45.9 F) |
| 1984 | -31.7 C (-25.1 F) |
| 1985 | -37.2 C (-35.0 F) |
| 1986 | -31.1 C (-24.0 F) |
| 1987 | -28.3 C (-18.9 F) |
| 1988 | -31.7 C (-25.1 F) |
| 1989 | -41.7 C (-43.1 F) |
| 1990 | -38.9 C (-38.0 F) |
| 1991 | -32.2 C (-26.0 F) |
| 1992 | -31.7 C (-25.1 F) |
| 1993 | -33.3 C (-27.9 F) |
| 1994 | -31.7 C (-25.1 F) |
| 1995 | -31.1 C (-24.0 F) |
| 1996 | -41.1 C (-42.0 F) |
| 1997 | -36.1 C (-33.0 F) |
| 1998 | -33.3 C (-27.9 F) |
| 1999 | -25.6 C (-14.1 F) |
| 2000 | -32.8 C (-27.0 F) |
| 2001 | -29.4 C (-20.9 F) |
| 2002 | -31.1 C (-24.0 F) |
| 2003 | -37.2 C (-35.0 F) |
| 2004 | -37.8 C (-36.0 F) |
| 2005 | -32.2 C (-26.0 F) |
| 2006 | -31.1 C (-24.0 F) |
| 2007 | -28.3 C (-18.9 F) |
| 2008 | -34.4 C (-29.9 F) |
| 2009 | -32.2 C (-26.0 F) |
| 2010 | -31.1 C (-24.0 F) |
| 2011 | -30.0 C (-22.0 F) |
| 2012 | -23.3 C (-9.9 F) |
| 2013 | -33.8 C (-28.8 F) |
| 2014 | -24.3 C (-11.7 F) |
| 2015 | -24.9 C (-12.8 F) |
| 2016 | -37.1 C (-34.8 F) |
| 2017 | -33.2 C (-27.8 F) |
| 2018 | -28.8 C (-19.8 F) |
| 2019 | -39.3 C (-38.7 F) |
| 2020 | -28.8 C (-19.8 F) |
| 2021 | -33.8 C (-28.8 F) |
| 2022 | -42.7 C (-44.9 F) |
| 2023 | -34.3 C (-29.7 F) |
| 2024 | -42.7 C (-44.9 F) |
| 2025 | -34.9 C (-30.8 F) |
| 2026 | -20.0 C (-4.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1941 | 24.1 mm (0.9 in) |
| 1942 | 21.8 mm (0.9 in) |
| 1943 | 20.6 mm (0.8 in) |
| 1944 | 32.5 mm (1.3 in) |
| 1945 | 20.3 mm (0.8 in) |
| 1946 | 19.1 mm (0.8 in) |
| 1947 | 27.7 mm (1.1 in) |
| 1948 | 44.7 mm (1.8 in) |
| 1949 | 19.3 mm (0.8 in) |
| 1950 | 19.6 mm (0.8 in) |
| 1951 | 25.9 mm (1.0 in) |
| 1952 | 40.1 mm (1.6 in) |
| 1953 | 37.8 mm (1.5 in) |
| 1954 | 21.6 mm (0.9 in) |
| 1955 | 26.4 mm (1.0 in) |
| 1956 | 21.1 mm (0.8 in) |
| 1957 | 24.6 mm (1.0 in) |
| 1958 | 19.1 mm (0.8 in) |
| 1959 | 23.1 mm (0.9 in) |
| 1960 | 15.7 mm (0.6 in) |
| 1961 | 19.6 mm (0.8 in) |
| 1962 | 37.8 mm (1.5 in) |
| 1963 | 26.9 mm (1.1 in) |
| 1964 | 40.9 mm (1.6 in) |
| 1965 | 44.7 mm (1.8 in) |
| 1966 | 23.9 mm (0.9 in) |
| 1967 | 17.0 mm (0.7 in) |
| 1968 | 21.3 mm (0.8 in) |
| 1969 | 54.4 mm (2.1 in) |
| 1970 | 27.2 mm (1.1 in) |
| 1971 | 42.9 mm (1.7 in) |
| 1972 | 13.5 mm (0.5 in) |
| 1973 | 23.9 mm (0.9 in) |
| 1974 | 16.3 mm (0.6 in) |
| 1975 | 24.1 mm (0.9 in) |
| 1976 | 31.0 mm (1.2 in) |
| 1977 | 25.1 mm (1.0 in) |
| 1978 | 24.6 mm (1.0 in) |
| 1979 | 27.7 mm (1.1 in) |
| 1980 | 48.5 mm (1.9 in) |
| 1981 | 37.3 mm (1.5 in) |
| 1982 | 24.1 mm (0.9 in) |
| 1983 | 25.4 mm (1.0 in) |
| 1984 | 25.1 mm (1.0 in) |
| 1985 | 13.5 mm (0.5 in) |
| 1986 | 22.1 mm (0.9 in) |
| 1987 | 24.1 mm (0.9 in) |
| 1988 | 26.2 mm (1.0 in) |
| 1989 | 16.3 mm (0.6 in) |
| 1990 | 16.8 mm (0.7 in) |
| 1991 | 21.6 mm (0.9 in) |
| 1992 | 34.3 mm (1.4 in) |
| 1993 | 34.5 mm (1.4 in) |
| 1994 | 22.6 mm (0.9 in) |
| 1995 | 20.6 mm (0.8 in) |
| 1996 | 23.9 mm (0.9 in) |
| 1997 | 28.2 mm (1.1 in) |
| 1998 | 29.5 mm (1.2 in) |
| 1999 | 13.5 mm (0.5 in) |
| 2000 | 24.4 mm (1.0 in) |
| 2001 | 30.2 mm (1.2 in) |
| 2002 | 25.7 mm (1.0 in) |
| 2003 | 22.1 mm (0.9 in) |
| 2004 | 33.3 mm (1.3 in) |
| 2005 | 19.3 mm (0.8 in) |
| 2006 | 29.2 mm (1.1 in) |
| 2007 | 35.1 mm (1.4 in) |
| 2008 | 23.1 mm (0.9 in) |
| 2009 | 22.9 mm (0.9 in) |
| 2010 | 23.4 mm (0.9 in) |
| 2011 | 31.0 mm (1.2 in) |
| 2012 | 12.2 mm (0.5 in) |
| 2013 | 18.8 mm (0.7 in) |
| 2014 | 0.0 mm (0.00 in) |
| 2015 | 18.0 mm (0.7 in) |
| 2016 | 17.5 mm (0.7 in) |
| 2017 | 28.2 mm (1.1 in) |
| 2018 | 21.3 mm (0.8 in) |
| 2019 | 21.8 mm (0.9 in) |
| 2020 | 13.5 mm (0.5 in) |
| 2021 | 21.3 mm (0.8 in) |
| 2022 | 23.1 mm (0.9 in) |
| 2023 | 48.0 mm (1.9 in) |
| 2024 | 28.7 mm (1.1 in) |
| 2025 | 23.9 mm (0.9 in) |
| 2026 | 24.6 mm (1.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1941 | 47.9 mm (1.9 in) |
| 1942 | 23.3 mm (0.9 in) |
| 1943 | 50.0 mm (2.0 in) |
| 1944 | 58.4 mm (2.3 in) |
| 1945 | 36.8 mm (1.4 in) |
| 1946 | 34.8 mm (1.4 in) |
| 1947 | 56.7 mm (2.2 in) |
| 1948 | 73.9 mm (2.9 in) |
| 1949 | 41.9 mm (1.6 in) |
| 1950 | 37.4 mm (1.5 in) |
| 1951 | 44.0 mm (1.7 in) |
| 1952 | 67.0 mm (2.6 in) |
| 1953 | 63.9 mm (2.5 in) |
| 1954 | 38.8 mm (1.5 in) |
| 1955 | 32.2 mm (1.3 in) |
| 1956 | 25.2 mm (1.0 in) |
| 1957 | 44.1 mm (1.7 in) |
| 1958 | 29.0 mm (1.1 in) |
| 1959 | 30.5 mm (1.2 in) |
| 1960 | 28.4 mm (1.1 in) |
| 1961 | 35.3 mm (1.4 in) |
| 1962 | 63.5 mm (2.5 in) |
| 1963 | 51.8 mm (2.0 in) |
| 1964 | 47.5 mm (1.9 in) |
| 1965 | 55.6 mm (2.2 in) |
| 1966 | 23.9 mm (0.9 in) |
| 1967 | 42.2 mm (1.7 in) |
| 1968 | 30.5 mm (1.2 in) |
| 1969 | 109.1 mm (4.3 in) |
| 1970 | 55.4 mm (2.2 in) |
| 1971 | 57.4 mm (2.3 in) |
| 1972 | 26.2 mm (1.0 in) |
| 1973 | 37.6 mm (1.5 in) |
| 1974 | 32.3 mm (1.3 in) |
| 1975 | 44.7 mm (1.8 in) |
| 1976 | 55.1 mm (2.2 in) |
| 1977 | 39.0 mm (1.5 in) |
| 1978 | 54.7 mm (2.2 in) |
| 1979 | 67.4 mm (2.7 in) |
| 1980 | 77.4 mm (3.0 in) |
| 1981 | 73.1 mm (2.9 in) |
| 1982 | 45.9 mm (1.8 in) |
| 1983 | 39.7 mm (1.6 in) |
| 1984 | 35.0 mm (1.4 in) |
| 1985 | 27.7 mm (1.1 in) |
| 1986 | 36.9 mm (1.5 in) |
| 1987 | 44.1 mm (1.7 in) |
| 1988 | 42.4 mm (1.7 in) |
| 1989 | 27.2 mm (1.1 in) |
| 1990 | 39.6 mm (1.6 in) |
| 1991 | 44.8 mm (1.8 in) |
| 1992 | 65.3 mm (2.6 in) |
| 1993 | 44.3 mm (1.7 in) |
| 1994 | 34.1 mm (1.3 in) |
| 1995 | 35.6 mm (1.4 in) |
| 1996 | 25.2 mm (1.0 in) |
| 1997 | 44.2 mm (1.7 in) |
| 1998 | 66.6 mm (2.6 in) |
| 1999 | 32.4 mm (1.3 in) |
| 2000 | 35.1 mm (1.4 in) |
| 2001 | 68.3 mm (2.7 in) |
| 2002 | 42.4 mm (1.7 in) |
| 2003 | 41.9 mm (1.6 in) |
| 2004 | 46.6 mm (1.8 in) |
| 2005 | 37.8 mm (1.5 in) |
| 2006 | 38.0 mm (1.5 in) |
| 2007 | 48.4 mm (1.9 in) |
| 2008 | 45.7 mm (1.8 in) |
| 2009 | 28.0 mm (1.1 in) |
| 2010 | 34.7 mm (1.4 in) |
| 2011 | 47.6 mm (1.9 in) |
| 2012 | 17.5 mm (0.7 in) |
| 2013 | 44.7 mm (1.8 in) |
| 2014 | n/a |
| 2015 | 34.8 mm (1.4 in) |
| 2016 | 26.3 mm (1.0 in) |
| 2017 | 46.7 mm (1.8 in) |
| 2018 | 49.2 mm (1.9 in) |
| 2019 | 38.6 mm (1.5 in) |
| 2020 | 34.6 mm (1.4 in) |
| 2021 | 34.1 mm (1.3 in) |
| 2022 | 31.0 mm (1.2 in) |
| 2023 | 52.6 mm (2.1 in) |
| 2024 | 44.9 mm (1.8 in) |
| 2025 | 26.4 mm (1.0 in) |
| 2026 | 53.0 mm (2.1 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1941 | 35 days |
| 1942 | 22 days |
| 1943 | 35 days |
| 1944 | 28 days |
| 1945 | 23 days |
| 1946 | 15 days |
| 1947 | 25 days |
| 1948 | 30 days |
| 1949 | 26 days |
| 1950 | 17 days |
| 1951 | 28 days |
| 1952 | 47 days |
| 1953 | 26 days |
| 1954 | 44 days |
| 1955 | 25 days |
| 1956 | 25 days |
| 1957 | 37 days |
| 1958 | 25 days |
| 1959 | 45 days |
| 1960 | 37 days |
| 1961 | 30 days |
| 1962 | 22 days |
| 1963 | 18 days |
| 1964 | 32 days |
| 1965 | 26 days |
| 1966 | 32 days |
| 1967 | 21 days |
| 1968 | 24 days |
| 1969 | 33 days |
| 1970 | 24 days |
| 1971 | 29 days |
| 1972 | 26 days |
| 1973 | 31 days |
| 1974 | 21 days |
| 1975 | 23 days |
| 1976 | 50 days |
| 1977 | 42 days |
| 1978 | 30 days |
| 1979 | 27 days |
| 1980 | 26 days |
| 1981 | 29 days |
| 1982 | 18 days |
| 1983 | 43 days |
| 1984 | 24 days |
| 1985 | 19 days |
| 1986 | 26 days |
| 1987 | 50 days |
| 1988 | 28 days |
| 1989 | 19 days |
| 1990 | 36 days |
| 1991 | 29 days |
| 1992 | 30 days |
| 1993 | 28 days |
| 1994 | 37 days |
| 1995 | 20 days |
| 1996 | 33 days |
| 1997 | 19 days |
| 1998 | 26 days |
| 1999 | 38 days |
| 2000 | 31 days |
| 2001 | 47 days |
| 2002 | 28 days |
| 2003 | 33 days |
| 2004 | 34 days |
| 2005 | 38 days |
| 2006 | 38 days |
| 2007 | 26 days |
| 2008 | 26 days |
| 2009 | 31 days |
| 2010 | 27 days |
| 2011 | 21 days |
| 2012 | 44 days |
| 2013 | 24 days |
| 2014 | 1 day |
| 2015 | 25 days |
| 2016 | 23 days |
| 2017 | 34 days |
| 2018 | 27 days |
| 2019 | 23 days |
| 2020 | 53 days |
| 2021 | 32 days |
| 2022 | 21 days |
| 2023 | 39 days |
| 2024 | 30 days |
| 2025 | 19 days |
| 2026 | 24 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 Bozeman Gallatin Fld AP falls on 31 May and the median first autumn frost on 12 September, which leaves a median of 102 days between them.
In 1995 to 2025 the median growing season was 107 days. That is 11 days more than in 1942 to 1971.
Fitted over all years, the growing season changes by +2.0 days per decade at this station.
| Measure | Median, all years | Earliest period (1942 to 1971) | Recent period (1995 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 31 May | 3 June | 31 May | 3 days earlier | -0.8 days per decade |
| First autumn frost | 12 September | 11 September | 16 September | 5 days later | +1.2 days per decade |
| Growing days | 102 days | 96 days | 107 days | 11 days more | +2.0 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
84 years, 1941 to 2025A day with at least 24.1 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 56.1 mm (2.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 24.1 mm (0.9 in) | |
| 5 years | 31.5 mm (1.2 in) | |
| 10 years | 36.9 mm (1.5 in) | |
| 25 years | 44.2 mm (1.7 in) | |
| 50 years | 50.0 mm (2.0 in) | |
| 100 years | 56.1 mm (2.2 in) | Longer than the 84 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, 84 years of values from 1941 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: 54.4 mm (2.1 in) in 1969; 48.5 mm (1.9 in) in 1980; 48.0 mm (1.9 in) in 2023.
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, Bozeman Gallatin Fld AP had a mean temperature of 6.4 C (43.4 F) and 326.5 mm (12.9 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Sonnette 7 SW (United States, 412 km away), Altamont (United States, 607 km away) and Idaho Falls FAA AP (United States, 262 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Sonnette 7 SW | United States | 412 km (256 mi) | 6.3 C (43.3 F) | 389.4 mm (15.3 in) | 0.76 |
| Altamont | United States | 607 km (377 mi) | 6.3 C (43.4 F) | 232.0 mm (9.1 in) | 0.87 |
| Idaho Falls FAA AP | United States | 262 km (163 mi) | 6.5 C (43.6 F) | 276.6 mm (10.9 in) | 0.89 |
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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-16).