Miles City AP Weather Records (USW00024037)
Record envelope, standing records and threshold days for Miles City AP (USW00024037), Montana, United States, with 90 years of record.
Key Facts for Miles City AP
- Miles City AP (USW00024037) is a weather station in Montana, United States at 46.43 latitude and -105.88 longitude, 800 m (2,625 ft) above sea level.
- The station reports from 1937 to 2026, 90 years of record.
- 1,464 records set at Miles City AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Miles City AP set a daily record precipitation of 14.7 mm (0.6 in) on 11 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, 46.43 latitude, -105.88 longitude.
- Elevation: 800 m (2,625 ft).
- Period of record: 1937 to 2026, 90 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
18 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 22.2 C (72.0 F) | -38.3 C (-36.9 F) | 15.0 C (59.0 F) | -26.7 C (-16.1 F) |
| Feb | 22.8 C (73.0 F) | -38.3 C (-36.9 F) | 20.0 C (68.0 F) | -19.4 C (-2.9 F) |
| Mar | 28.3 C (82.9 F) | -34.9 C (-30.8 F) | 27.2 C (81.0 F) | -17.8 C (0.0 F) |
| Apr | 33.3 C (91.9 F) | -16.6 C (2.1 F) | 29.4 C (84.9 F) | -6.1 C (21.0 F) |
| May | 37.8 C (100.0 F) | -9.4 C (15.1 F) | 35.6 C (96.1 F) | -6.1 C (21.0 F) |
| Jun | 43.9 C (111.0 F) | 0.0 C (32.0 F) | 33.9 C (93.0 F) | 5.0 C (41.0 F) |
| Jul | 46.1 C (115.0 F) | 5.0 C (41.0 F) | 46.1 C (115.0 F) | 10.6 C (51.1 F) |
| Aug | 43.3 C (109.9 F) | 1.7 C (35.1 F) | 41.1 C (106.0 F) | 5.6 C (42.1 F) |
| Sep | 41.1 C (106.0 F) | -7.2 C (19.0 F) | 37.2 C (99.0 F) | 4.4 C (39.9 F) |
| Oct | 35.0 C (95.0 F) | -22.2 C (-8.0 F) | 30.0 C (86.0 F) | 2.8 C (37.0 F) |
| Nov | 27.2 C (81.0 F) | -31.7 C (-25.1 F) | n/a | n/a |
| Dec | 21.1 C (70.0 F) | -38.9 C (-38.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1937 | 20 |
| 1938 | 6 |
| 1939 | 31 |
| 1940 | 11 |
| 1941 | 4 |
| 1942 | 13 |
| 1943 | 22 |
| 1944 | 14 |
| 1945 | 17 |
| 1946 | 18 |
| 1947 | 16 |
| 1948 | 16 |
| 1949 | 19 |
| 1950 | 30 |
| 1951 | 26 |
| 1952 | 10 |
| 1953 | 14 |
| 1954 | 24 |
| 1955 | 13 |
| 1956 | 19 |
| 1957 | 8 |
| 1958 | 19 |
| 1959 | 15 |
| 1960 | 15 |
| 1961 | 11 |
| 1962 | 14 |
| 1963 | 21 |
| 1964 | 12 |
| 1965 | 21 |
| 1966 | 13 |
| 1967 | 12 |
| 1968 | 12 |
| 1969 | 22 |
| 1970 | 8 |
| 1971 | 11 |
| 1972 | 24 |
| 1973 | 11 |
| 1974 | 14 |
| 1975 | 3 |
| 1976 | 15 |
| 1977 | 17 |
| 1978 | 17 |
| 1979 | 11 |
| 1980 | 20 |
| 1981 | 10 |
| 1982 | 15 |
| 1983 | 28 |
| 1984 | 11 |
| 1985 | 35 |
| 1986 | 19 |
| 1987 | 17 |
| 1988 | 33 |
| 1989 | 14 |
| 1990 | 16 |
| 1991 | 24 |
| 1992 | 30 |
| 1993 | 14 |
| 1994 | 9 |
| 1995 | 26 |
| 1996 | 19 |
| 1997 | 10 |
| 1998 | 8 |
| 1999 | 12 |
| 2000 | 26 |
| 2001 | 7 |
| 2002 | 27 |
| 2003 | 27 |
| 2004 | 14 |
| 2005 | 18 |
| 2006 | 7 |
| 2007 | 17 |
| 2008 | 10 |
| 2009 | 11 |
| 2010 | 5 |
| 2011 | 9 |
| 2012 | 26 |
| 2013 | 13 |
| 2014 | 14 |
| 2015 | 19 |
| 2016 | 12 |
| 2017 | 18 |
| 2018 | 12 |
| 2019 | 14 |
| 2020 | 29 |
| 2021 | 22 |
| 2022 | 14 |
| 2023 | 11 |
| 2024 | 9 |
| 2025 | 13 |
| 2026 | 21 |
All-Time Record Progression
8 new records| Date | Kind | Detail |
|---|---|---|
| 1983-12-24 | Record low maximum temperature | Record low maximum temperature -31.7 C (-25.1 F) |
| 1983-12-24 | Record low minimum temperature | Record low minimum temperature -38.9 C (-38.0 F) |
| 1988-06-20 | Record high minimum temperature | Record high minimum temperature 25.6 C (78.1 F) |
| 1989-04-27 | Record daily snowfall | Record daily snowfall 38.1 cm (15.0 in) |
| 2007-07-24 | Record high minimum temperature | Record high minimum temperature 26.1 C (79.0 F) |
| 2012-06-26 | Record high maximum temperature | Record high maximum temperature 43.9 C (111.0 F) |
| 2016-04-24 | Record daily precipitation | Record daily precipitation 73.9 mm (2.9 in) |
| 2026-07-12 | Record high maximum temperature | Record high maximum temperature 46.1 C (115.0 F) |
Wettest Day of Each Month
Apr: 73.9 mm (2.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 19.3 mm (0.8 in) | 3 January 1996 |
| Feb | 19.6 mm (0.8 in) | 18 February 1952 |
| Mar | 30.5 mm (1.2 in) | 30 March 2006 |
| Apr | 73.9 mm (2.9 in) | 24 April 2016 |
| May | 58.4 mm (2.3 in) | 17 May 1978 |
| Jun | 68.8 mm (2.7 in) | 18 June 1964 |
| Jul | 56.4 mm (2.2 in) | 29 July 1985 |
| Aug | 42.2 mm (1.7 in) | 23 August 1968 |
| Sep | 67.8 mm (2.7 in) | 7 September 1941 |
| Oct | 53.6 mm (2.1 in) | 1 October 1971 |
| Nov | 29.7 mm (1.2 in) | 1 November 1957 |
| Dec | 12.2 mm (0.5 in) | 6 December 1971 |
Period of Record Coverage
1937 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1937 | 350 | 96% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | 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 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 364 | 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 | 364 | 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 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 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 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 334 | 92% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | 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 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 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 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 285 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 11 October 2026 | Miles City AP, US | daily rain (Provisional) | 14.7 mm (0.6 in) | 8.9 mm (0.35 in) | 17 years | 20 of 100 (Routine) |
| 23 September 2026 | Miles City AP, US | daily high min (Provisional) | 12.8 C (55.0 F) | 0.6 C (1.1 F) | 72 years | 31 of 100 (Routine) |
| 20 September 2026 | Miles City AP, US | daily rain (Provisional) | 17.5 mm (0.7 in) | 3.8 mm (0.15 in) | 8 years | 16 of 100 (Routine) |
| 19 September 2026 | Miles City AP, US | daily rain (Provisional) | 39.9 mm (1.6 in) | 15.5 mm (0.6 in) | 40 years | 42 of 100 (Notable) |
| 19 September 2026 | Miles City AP, US | daily high min (Tie, Provisional) | 14.4 C (57.9 F) | tie | 56 years | 6 of 100 (Routine) |
| 5 August 2026 | Miles City AP, US | daily low min | 7.2 C (45.0 F) | 1.1 C (2.0 F) | 48 years | 26 of 100 (Routine) |
| 4 August 2026 | Miles City AP, US | daily low min | 5.6 C (42.1 F) | 2.7 C (4.9 F) | 73 years | 38 of 100 (Notable) |
| 1 August 2026 | Miles City AP, US | daily high max | 41.1 C (106.0 F) | 1.1 C (2.0 F) | 17 years | 16 of 100 (Routine) |
| 26 July 2026 | Miles City AP, US | daily high min (Tie) | 21.7 C (71.1 F) | tie | 37 years | 5 of 100 (Routine) |
| 25 July 2026 | Miles City AP, US | daily high max | 41.7 C (107.1 F) | 1.1 C (2.0 F) | 1 year | 11 of 100 (Routine) |
| 12 July 2026 | Miles City AP, US | all-time high max | 46.1 C (115.0 F) | 2.2 C (4.0 F) | 14 years | 37 of 100 (Notable) |
| 12 July 2026 | Miles City AP, US | daily high min (Tie) | 22.2 C (72.0 F) | tie | 72 years | 7 of 100 (Routine) |
| 11 July 2026 | Miles City AP, US | daily high max | 40.0 C (104.0 F) | 0.6 C (1.1 F) | 87 years | 36 of 100 (Notable) |
| 31 May 2026 | Miles City AP, US | daily rain | 26.7 mm (1.1 in) | 1.6 mm (0.06 in) | 12 years | 14 of 100 (Routine) |
| 28 May 2026 | Miles City AP, US | daily high min | 20.0 C (68.0 F) | 3.3 C (5.9 F) | 76 years | 39 of 100 (Notable) |
| 27 May 2026 | Miles City AP, US | daily high min | 19.4 C (66.9 F) | 2.7 C (4.9 F) | 8 years | 17 of 100 (Routine) |
| 26 May 2026 | Miles City AP, US | daily high min | 18.3 C (64.9 F) | 2.2 C (4.0 F) | 23 years | 20 of 100 (Routine) |
| 25 May 2026 | Miles City AP, US | daily high max | 33.3 C (91.9 F) | 1.1 C (2.0 F) | 56 years | 27 of 100 (Routine) |
| 19 May 2026 | Miles City AP, US | daily low min | -3.9 C (25.0 F) | 1.7 C (3.1 F) | 57 years | 30 of 100 (Routine) |
| 6 May 2026 | Miles City AP, US | daily low min | -6.1 C (21.0 F) | 3.9 C (7.0 F) | 80 years | 42 of 100 (Notable) |
Climate Trend
87 complete years, 1938 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1938 | 8.4 C | +0.52 C |
| 1939 | 8.7 C | +0.83 C |
| 1940 | 8.1 C | +0.25 C |
| 1941 | 8.3 C | +0.46 C |
| 1942 | 7.5 C | -0.37 C |
| 1943 | 7.4 C | -0.45 C |
| 1944 | 7.2 C | -0.62 C |
| 1945 | 6.9 C | -0.93 C |
| 1946 | 8.3 C | +0.44 C |
| 1947 | 7.4 C | -0.47 C |
| 1948 | 7.5 C | -0.30 C |
| 1949 | 6.5 C | -1.29 C |
| 1950 | 5.1 C | -2.75 C |
| 1951 | 5.2 C | -2.61 C |
| 1952 | 7.3 C | -0.55 C |
| 1953 | 9.0 C | +1.18 C |
| 1954 | 8.1 C | +0.29 C |
| 1955 | 6.9 C | -0.95 C |
| 1956 | 7.9 C | +0.09 C |
| 1957 | 7.6 C | -0.26 C |
| 1958 | 8.5 C | +0.67 C |
| 1959 | 6.9 C | -0.95 C |
| 1960 | 8.0 C | +0.20 C |
| 1961 | 8.7 C | +0.85 C |
| 1962 | 7.9 C | +0.10 C |
| 1963 | 8.8 C | +0.94 C |
| 1964 | 7.1 C | -0.71 C |
| 1965 | 6.1 C | -1.69 C |
| 1966 | 6.7 C | -1.14 C |
| 1967 | 7.6 C | -0.26 C |
| 1968 | 7.1 C | -0.73 C |
| 1969 | 6.7 C | -1.09 C |
| 1970 | 7.1 C | -0.78 C |
| 1971 | 7.0 C | -0.84 C |
| 1972 | 6.3 C | -1.52 C |
| 1973 | 8.2 C | +0.38 C |
| 1974 | 8.5 C | +0.63 C |
| 1975 | 6.7 C | -1.13 C |
| 1976 | 8.6 C | +0.73 C |
| 1977 | 7.7 C | -0.14 C |
| 1978 | 5.5 C | -2.29 C |
| 1979 | 6.4 C | -1.44 C |
| 1980 | 8.6 C | +0.73 C |
| 1981 | 9.5 C | +1.65 C |
| 1982 | 5.9 C | -1.95 C |
| 1983 | 8.3 C | +0.44 C |
| 1984 | 8.1 C | +0.24 C |
| 1985 | 6.3 C | -1.56 C |
| 1986 | 8.5 C | +0.67 C |
| 1987 | 9.7 C | +1.85 C |
| 1988 | 9.3 C | +1.45 C |
| 1990 | 9.1 C | +1.23 C |
| 1991 | 8.9 C | +1.03 C |
| 1992 | 9.3 C | +1.48 C |
| 1993 | 6.3 C | -1.54 C |
| 1994 | 8.3 C | +0.51 C |
| 1995 | 7.9 C | +0.11 C |
| 1996 | 6.0 C | -1.88 C |
| 1997 | 8.7 C | +0.91 C |
| 1998 | 9.5 C | +1.64 C |
| 1999 | 9.6 C | +1.80 C |
| 2000 | 8.3 C | +0.46 C |
| 2001 | 8.4 C | +0.59 C |
| 2002 | 7.6 C | -0.22 C |
| 2003 | 8.4 C | +0.59 C |
| 2004 | 8.0 C | +0.14 C |
| 2005 | 8.2 C | +0.36 C |
| 2006 | 9.3 C | +1.49 C |
| 2007 | 9.2 C | +1.36 C |
| 2008 | 7.4 C | -0.45 C |
| 2009 | 7.5 C | -0.35 C |
| 2010 | 6.9 C | -0.95 C |
| 2011 | 7.3 C | -0.57 C |
| 2012 | 10.0 C | +2.17 C |
| 2013 | 8.0 C | +0.18 C |
| 2014 | 7.2 C | -0.64 C |
| 2015 | 9.4 C | +1.55 C |
| 2016 | 9.9 C | +2.03 C |
| 2017 | 8.6 C | +0.74 C |
| 2018 | 6.3 C | -1.50 C |
| 2019 | 6.2 C | -1.68 C |
| 2020 | 8.4 C | +0.57 C |
| 2021 | 8.7 C | +0.90 C |
| 2022 | 7.4 C | -0.42 C |
| 2023 | 8.7 C | +0.90 C |
| 2024 | 9.0 C | +1.12 C |
| 2025 | 8.5 C | +0.67 C |
The annual mean temperature here has risen by 0.12 C (0.03 to 0.21) per decade over 1938 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 87 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.12 C (0.03 to 0.21) per decade | 0.2 F (0.1 to 0.4) per decade | 1938 to 2025 | 87 | Rise |
| Mean daily maximum | 0.11 C (0.01 to 0.22) per decade | 0.20 F (0.01 to 0.39) per decade | 1938 to 2025 | 87 | Rise |
| Mean daily minimum | 0.13 C (0.05 to 0.21) per decade | 0.2 F (0.1 to 0.4) per decade | 1938 to 2025 | 87 | 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
1937 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 46.1 C (115.0 F) | 2026 | 40.0 C (104.0 F) | 90 |
| Coldest night (TNn) | -38.9 C (-38.0 F) | 1983 | -32.7 C (-26.9 F) | 90 |
| Wettest day (Rx1day) | 73.9 mm (2.9 in) | 2016 | 31.5 mm (1.2 in) | 90 |
| Wettest five days (Rx5day) | 106.5 mm (4.2 in) | 2013 | 52.5 mm (2.1 in) | 90 |
| Longest dry spell (CDD) | 81 days | 2002 | 38 days | 90 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1937 | 42.8 C (109.0 F) |
| 1938 | 38.9 C (102.0 F) |
| 1939 | 40.6 C (105.1 F) |
| 1940 | 40.6 C (105.1 F) |
| 1941 | 38.9 C (102.0 F) |
| 1942 | 37.2 C (99.0 F) |
| 1943 | 39.4 C (102.9 F) |
| 1944 | 35.0 C (95.0 F) |
| 1945 | 38.3 C (100.9 F) |
| 1946 | 38.9 C (102.0 F) |
| 1947 | 42.2 C (108.0 F) |
| 1948 | 40.6 C (105.1 F) |
| 1949 | 43.3 C (109.9 F) |
| 1950 | 40.6 C (105.1 F) |
| 1951 | 39.4 C (102.9 F) |
| 1952 | 39.4 C (102.9 F) |
| 1953 | 39.4 C (102.9 F) |
| 1954 | 42.2 C (108.0 F) |
| 1955 | 41.1 C (106.0 F) |
| 1956 | 40.6 C (105.1 F) |
| 1957 | 39.4 C (102.9 F) |
| 1958 | 40.6 C (105.1 F) |
| 1959 | 41.1 C (106.0 F) |
| 1960 | 42.8 C (109.0 F) |
| 1961 | 40.6 C (105.1 F) |
| 1962 | 38.3 C (100.9 F) |
| 1963 | 39.4 C (102.9 F) |
| 1964 | 40.6 C (105.1 F) |
| 1965 | 39.4 C (102.9 F) |
| 1966 | 42.2 C (108.0 F) |
| 1967 | 38.9 C (102.0 F) |
| 1968 | 39.4 C (102.9 F) |
| 1969 | 40.0 C (104.0 F) |
| 1970 | 40.0 C (104.0 F) |
| 1971 | 40.0 C (104.0 F) |
| 1972 | 37.2 C (99.0 F) |
| 1973 | 39.4 C (102.9 F) |
| 1974 | 40.0 C (104.0 F) |
| 1975 | 41.1 C (106.0 F) |
| 1976 | 42.2 C (108.0 F) |
| 1977 | 40.0 C (104.0 F) |
| 1978 | 38.3 C (100.9 F) |
| 1979 | 39.4 C (102.9 F) |
| 1980 | 42.8 C (109.0 F) |
| 1981 | 38.9 C (102.0 F) |
| 1982 | 38.3 C (100.9 F) |
| 1983 | 42.2 C (108.0 F) |
| 1984 | 40.6 C (105.1 F) |
| 1985 | 40.6 C (105.1 F) |
| 1986 | 38.9 C (102.0 F) |
| 1987 | 37.8 C (100.0 F) |
| 1988 | 41.1 C (106.0 F) |
| 1989 | 40.0 C (104.0 F) |
| 1990 | 40.0 C (104.0 F) |
| 1991 | 38.9 C (102.0 F) |
| 1992 | 37.8 C (100.0 F) |
| 1993 | 35.0 C (95.0 F) |
| 1994 | 38.9 C (102.0 F) |
| 1995 | 43.3 C (109.9 F) |
| 1996 | 38.9 C (102.0 F) |
| 1997 | 38.9 C (102.0 F) |
| 1998 | 40.0 C (104.0 F) |
| 1999 | 42.2 C (108.0 F) |
| 2000 | 41.1 C (106.0 F) |
| 2001 | 40.6 C (105.1 F) |
| 2002 | 43.3 C (109.9 F) |
| 2003 | 42.2 C (108.0 F) |
| 2004 | 41.7 C (107.1 F) |
| 2005 | 41.1 C (106.0 F) |
| 2006 | 40.0 C (104.0 F) |
| 2007 | 43.3 C (109.9 F) |
| 2008 | 40.0 C (104.0 F) |
| 2009 | 39.4 C (102.9 F) |
| 2010 | 38.9 C (102.0 F) |
| 2011 | 37.2 C (99.0 F) |
| 2012 | 43.9 C (111.0 F) |
| 2013 | 39.4 C (102.9 F) |
| 2014 | 38.9 C (102.0 F) |
| 2015 | 40.6 C (105.1 F) |
| 2016 | 39.4 C (102.9 F) |
| 2017 | 40.6 C (105.1 F) |
| 2018 | 41.1 C (106.0 F) |
| 2019 | 36.7 C (98.1 F) |
| 2020 | 38.9 C (102.0 F) |
| 2021 | 42.8 C (109.0 F) |
| 2022 | 41.1 C (106.0 F) |
| 2023 | 40.0 C (104.0 F) |
| 2024 | 42.2 C (108.0 F) |
| 2025 | 39.4 C (102.9 F) |
| 2026 | 46.1 C (115.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1937 | -34.4 C (-29.9 F) |
| 1938 | -33.3 C (-27.9 F) |
| 1939 | -38.3 C (-36.9 F) |
| 1940 | -33.3 C (-27.9 F) |
| 1941 | -32.8 C (-27.0 F) |
| 1942 | -33.9 C (-29.0 F) |
| 1943 | -35.6 C (-32.1 F) |
| 1944 | -31.1 C (-24.0 F) |
| 1945 | -32.2 C (-26.0 F) |
| 1946 | -30.0 C (-22.0 F) |
| 1947 | -32.8 C (-27.0 F) |
| 1948 | -28.9 C (-20.0 F) |
| 1949 | -36.1 C (-33.0 F) |
| 1950 | -33.9 C (-29.0 F) |
| 1951 | -35.0 C (-31.0 F) |
| 1952 | -33.9 C (-29.0 F) |
| 1953 | -24.4 C (-11.9 F) |
| 1954 | -37.8 C (-36.0 F) |
| 1955 | -30.6 C (-23.1 F) |
| 1956 | -32.2 C (-26.0 F) |
| 1957 | -38.3 C (-36.9 F) |
| 1958 | -32.2 C (-26.0 F) |
| 1959 | -33.9 C (-29.0 F) |
| 1960 | -31.7 C (-25.1 F) |
| 1961 | -26.7 C (-16.1 F) |
| 1962 | -32.8 C (-27.0 F) |
| 1963 | -33.9 C (-29.0 F) |
| 1964 | -33.9 C (-29.0 F) |
| 1965 | -27.2 C (-17.0 F) |
| 1966 | -31.7 C (-25.1 F) |
| 1967 | -33.3 C (-27.9 F) |
| 1968 | -33.3 C (-27.9 F) |
| 1969 | -38.3 C (-36.9 F) |
| 1970 | -31.7 C (-25.1 F) |
| 1971 | -35.0 C (-31.0 F) |
| 1972 | -32.8 C (-27.0 F) |
| 1973 | -29.4 C (-20.9 F) |
| 1974 | -32.8 C (-27.0 F) |
| 1975 | -27.2 C (-17.0 F) |
| 1976 | -32.2 C (-26.0 F) |
| 1977 | -37.2 C (-35.0 F) |
| 1978 | -34.4 C (-29.9 F) |
| 1979 | -33.3 C (-27.9 F) |
| 1980 | -30.0 C (-22.0 F) |
| 1981 | -28.9 C (-20.0 F) |
| 1982 | -37.8 C (-36.0 F) |
| 1983 | -38.9 C (-38.0 F) |
| 1984 | -28.9 C (-20.0 F) |
| 1985 | -36.1 C (-33.0 F) |
| 1986 | -26.1 C (-15.0 F) |
| 1987 | -23.9 C (-11.0 F) |
| 1988 | -32.8 C (-27.0 F) |
| 1989 | -36.1 C (-33.0 F) |
| 1990 | -36.7 C (-34.1 F) |
| 1991 | -31.7 C (-25.1 F) |
| 1992 | -30.6 C (-23.1 F) |
| 1993 | -31.1 C (-24.0 F) |
| 1994 | -30.0 C (-22.0 F) |
| 1995 | -28.3 C (-18.9 F) |
| 1996 | -38.3 C (-36.9 F) |
| 1997 | -32.2 C (-26.0 F) |
| 1998 | -36.7 C (-34.1 F) |
| 1999 | -27.2 C (-17.0 F) |
| 2000 | -31.1 C (-24.0 F) |
| 2001 | -23.3 C (-9.9 F) |
| 2002 | -30.0 C (-22.0 F) |
| 2003 | -27.8 C (-18.0 F) |
| 2004 | -32.8 C (-27.0 F) |
| 2005 | -36.7 C (-34.1 F) |
| 2006 | -27.2 C (-17.0 F) |
| 2007 | -26.1 C (-15.0 F) |
| 2008 | -30.6 C (-23.1 F) |
| 2009 | -30.0 C (-22.0 F) |
| 2010 | -31.7 C (-25.1 F) |
| 2011 | -35.0 C (-31.0 F) |
| 2012 | -22.8 C (-9.0 F) |
| 2013 | -37.7 C (-35.9 F) |
| 2014 | -31.6 C (-24.9 F) |
| 2015 | -28.2 C (-18.8 F) |
| 2016 | -32.7 C (-26.9 F) |
| 2017 | -32.7 C (-26.9 F) |
| 2018 | -34.3 C (-29.7 F) |
| 2019 | -34.9 C (-30.8 F) |
| 2020 | -25.5 C (-13.9 F) |
| 2021 | -36.6 C (-33.9 F) |
| 2022 | -33.8 C (-28.8 F) |
| 2023 | -31.6 C (-24.9 F) |
| 2024 | -36.6 C (-33.9 F) |
| 2025 | -34.3 C (-29.7 F) |
| 2026 | -26.7 C (-16.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1937 | 26.9 mm (1.1 in) |
| 1938 | 30.2 mm (1.2 in) |
| 1939 | 25.1 mm (1.0 in) |
| 1940 | 29.0 mm (1.1 in) |
| 1941 | 67.8 mm (2.7 in) |
| 1942 | 24.6 mm (1.0 in) |
| 1943 | 45.0 mm (1.8 in) |
| 1944 | 49.3 mm (1.9 in) |
| 1945 | 25.7 mm (1.0 in) |
| 1946 | 44.2 mm (1.7 in) |
| 1947 | 35.6 mm (1.4 in) |
| 1948 | 41.7 mm (1.6 in) |
| 1949 | 20.3 mm (0.8 in) |
| 1950 | 41.4 mm (1.6 in) |
| 1951 | 27.9 mm (1.1 in) |
| 1952 | 19.6 mm (0.8 in) |
| 1953 | 38.4 mm (1.5 in) |
| 1954 | 25.4 mm (1.0 in) |
| 1955 | 55.1 mm (2.2 in) |
| 1956 | 25.1 mm (1.0 in) |
| 1957 | 29.7 mm (1.2 in) |
| 1958 | 22.9 mm (0.9 in) |
| 1959 | 14.2 mm (0.6 in) |
| 1960 | 18.5 mm (0.7 in) |
| 1961 | 25.1 mm (1.0 in) |
| 1962 | 56.6 mm (2.2 in) |
| 1963 | 40.6 mm (1.6 in) |
| 1964 | 68.8 mm (2.7 in) |
| 1965 | 22.9 mm (0.9 in) |
| 1966 | 33.3 mm (1.3 in) |
| 1967 | 44.5 mm (1.8 in) |
| 1968 | 42.2 mm (1.7 in) |
| 1969 | 42.9 mm (1.7 in) |
| 1970 | 27.2 mm (1.1 in) |
| 1971 | 53.6 mm (2.1 in) |
| 1972 | 28.7 mm (1.1 in) |
| 1973 | 45.0 mm (1.8 in) |
| 1974 | 20.8 mm (0.8 in) |
| 1975 | 42.2 mm (1.7 in) |
| 1976 | 20.3 mm (0.8 in) |
| 1977 | 25.4 mm (1.0 in) |
| 1978 | 58.4 mm (2.3 in) |
| 1979 | 53.8 mm (2.1 in) |
| 1980 | 24.9 mm (1.0 in) |
| 1981 | 25.7 mm (1.0 in) |
| 1982 | 44.5 mm (1.8 in) |
| 1983 | 25.1 mm (1.0 in) |
| 1984 | 24.4 mm (1.0 in) |
| 1985 | 56.4 mm (2.2 in) |
| 1986 | 27.9 mm (1.1 in) |
| 1987 | 26.9 mm (1.1 in) |
| 1988 | 20.3 mm (0.8 in) |
| 1989 | 52.3 mm (2.1 in) |
| 1990 | 32.8 mm (1.3 in) |
| 1991 | 51.8 mm (2.0 in) |
| 1992 | 33.3 mm (1.3 in) |
| 1993 | 62.2 mm (2.4 in) |
| 1994 | 21.8 mm (0.9 in) |
| 1995 | 33.8 mm (1.3 in) |
| 1996 | 31.5 mm (1.2 in) |
| 1997 | 31.5 mm (1.2 in) |
| 1998 | 29.0 mm (1.1 in) |
| 1999 | 31.0 mm (1.2 in) |
| 2000 | 18.0 mm (0.7 in) |
| 2001 | 43.7 mm (1.7 in) |
| 2002 | 21.6 mm (0.9 in) |
| 2003 | 22.4 mm (0.9 in) |
| 2004 | 23.6 mm (0.9 in) |
| 2005 | 34.0 mm (1.3 in) |
| 2006 | 33.8 mm (1.3 in) |
| 2007 | 51.3 mm (2.0 in) |
| 2008 | 33.3 mm (1.3 in) |
| 2009 | 25.9 mm (1.0 in) |
| 2010 | 55.1 mm (2.2 in) |
| 2011 | 56.4 mm (2.2 in) |
| 2012 | 11.4 mm (0.4 in) |
| 2013 | 47.0 mm (1.9 in) |
| 2014 | 52.8 mm (2.1 in) |
| 2015 | 21.1 mm (0.8 in) |
| 2016 | 73.9 mm (2.9 in) |
| 2017 | 29.7 mm (1.2 in) |
| 2018 | 33.5 mm (1.3 in) |
| 2019 | 29.7 mm (1.2 in) |
| 2020 | 22.9 mm (0.9 in) |
| 2021 | 27.7 mm (1.1 in) |
| 2022 | 17.0 mm (0.7 in) |
| 2023 | 40.6 mm (1.6 in) |
| 2024 | 31.8 mm (1.3 in) |
| 2025 | 33.5 mm (1.3 in) |
| 2026 | 39.9 mm (1.6 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1937 | 31.7 mm (1.2 in) |
| 1938 | 38.6 mm (1.5 in) |
| 1939 | 45.8 mm (1.8 in) |
| 1940 | 51.6 mm (2.0 in) |
| 1941 | 68.6 mm (2.7 in) |
| 1942 | 50.0 mm (2.0 in) |
| 1943 | 87.4 mm (3.4 in) |
| 1944 | 78.0 mm (3.1 in) |
| 1945 | 30.3 mm (1.2 in) |
| 1946 | 95.2 mm (3.7 in) |
| 1947 | 53.3 mm (2.1 in) |
| 1948 | 66.3 mm (2.6 in) |
| 1949 | 47.7 mm (1.9 in) |
| 1950 | 60.5 mm (2.4 in) |
| 1951 | 75.5 mm (3.0 in) |
| 1952 | 35.9 mm (1.4 in) |
| 1953 | 52.9 mm (2.1 in) |
| 1954 | 44.0 mm (1.7 in) |
| 1955 | 61.5 mm (2.4 in) |
| 1956 | 34.2 mm (1.3 in) |
| 1957 | 36.3 mm (1.4 in) |
| 1958 | 59.5 mm (2.3 in) |
| 1959 | 18.5 mm (0.7 in) |
| 1960 | 23.4 mm (0.9 in) |
| 1961 | 44.4 mm (1.7 in) |
| 1962 | 77.2 mm (3.0 in) |
| 1963 | 89.2 mm (3.5 in) |
| 1964 | 99.6 mm (3.9 in) |
| 1965 | 47.5 mm (1.9 in) |
| 1966 | 39.4 mm (1.6 in) |
| 1967 | 67.1 mm (2.6 in) |
| 1968 | 57.9 mm (2.3 in) |
| 1969 | 58.6 mm (2.3 in) |
| 1970 | 47.1 mm (1.9 in) |
| 1971 | 101.9 mm (4.0 in) |
| 1972 | 51.5 mm (2.0 in) |
| 1973 | 76.5 mm (3.0 in) |
| 1974 | 47.3 mm (1.9 in) |
| 1975 | 93.0 mm (3.7 in) |
| 1976 | 39.8 mm (1.6 in) |
| 1977 | 35.1 mm (1.4 in) |
| 1978 | 76.2 mm (3.0 in) |
| 1979 | 60.7 mm (2.4 in) |
| 1980 | 60.2 mm (2.4 in) |
| 1981 | 35.9 mm (1.4 in) |
| 1982 | 80.4 mm (3.2 in) |
| 1983 | 31.2 mm (1.2 in) |
| 1984 | 36.6 mm (1.4 in) |
| 1985 | 90.8 mm (3.6 in) |
| 1986 | 73.7 mm (2.9 in) |
| 1987 | 69.4 mm (2.7 in) |
| 1988 | 22.1 mm (0.9 in) |
| 1989 | 81.0 mm (3.2 in) |
| 1990 | 67.4 mm (2.7 in) |
| 1991 | 73.7 mm (2.9 in) |
| 1992 | 46.2 mm (1.8 in) |
| 1993 | 70.3 mm (2.8 in) |
| 1994 | 30.4 mm (1.2 in) |
| 1995 | 46.2 mm (1.8 in) |
| 1996 | 67.7 mm (2.7 in) |
| 1997 | 41.7 mm (1.6 in) |
| 1998 | 55.1 mm (2.2 in) |
| 1999 | 51.0 mm (2.0 in) |
| 2000 | 24.1 mm (0.9 in) |
| 2001 | 51.4 mm (2.0 in) |
| 2002 | 27.2 mm (1.1 in) |
| 2003 | 39.4 mm (1.6 in) |
| 2004 | 34.0 mm (1.3 in) |
| 2005 | 62.8 mm (2.5 in) |
| 2006 | 42.2 mm (1.7 in) |
| 2007 | 55.6 mm (2.2 in) |
| 2008 | 36.7 mm (1.4 in) |
| 2009 | 56.6 mm (2.2 in) |
| 2010 | 91.8 mm (3.6 in) |
| 2011 | 105.2 mm (4.1 in) |
| 2012 | 19.6 mm (0.8 in) |
| 2013 | 106.5 mm (4.2 in) |
| 2014 | 67.3 mm (2.6 in) |
| 2015 | 35.1 mm (1.4 in) |
| 2016 | 85.2 mm (3.4 in) |
| 2017 | 34.0 mm (1.3 in) |
| 2018 | 52.1 mm (2.1 in) |
| 2019 | 42.0 mm (1.7 in) |
| 2020 | 50.7 mm (2.0 in) |
| 2021 | 56.7 mm (2.2 in) |
| 2022 | 37.6 mm (1.5 in) |
| 2023 | 63.8 mm (2.5 in) |
| 2024 | 77.0 mm (3.0 in) |
| 2025 | 49.3 mm (1.9 in) |
| 2026 | 57.9 mm (2.3 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1937 | 38 days |
| 1938 | 29 days |
| 1939 | 52 days |
| 1940 | 36 days |
| 1941 | 37 days |
| 1942 | 29 days |
| 1943 | 38 days |
| 1944 | 36 days |
| 1945 | 62 days |
| 1946 | 26 days |
| 1947 | 36 days |
| 1948 | 38 days |
| 1949 | 63 days |
| 1950 | 28 days |
| 1951 | 37 days |
| 1952 | 42 days |
| 1953 | 40 days |
| 1954 | 50 days |
| 1955 | 26 days |
| 1956 | 45 days |
| 1957 | 33 days |
| 1958 | 32 days |
| 1959 | 38 days |
| 1960 | 43 days |
| 1961 | 38 days |
| 1962 | 30 days |
| 1963 | 66 days |
| 1964 | 27 days |
| 1965 | 42 days |
| 1966 | 29 days |
| 1967 | 36 days |
| 1968 | 22 days |
| 1969 | 39 days |
| 1970 | 32 days |
| 1971 | 45 days |
| 1972 | 36 days |
| 1973 | 37 days |
| 1974 | 29 days |
| 1975 | 25 days |
| 1976 | 29 days |
| 1977 | 28 days |
| 1978 | 23 days |
| 1979 | 41 days |
| 1980 | 39 days |
| 1981 | 46 days |
| 1982 | 24 days |
| 1983 | 38 days |
| 1984 | 34 days |
| 1985 | 31 days |
| 1986 | 27 days |
| 1987 | 57 days |
| 1988 | 34 days |
| 1989 | 20 days |
| 1990 | 63 days |
| 1991 | 30 days |
| 1992 | 51 days |
| 1993 | 36 days |
| 1994 | 44 days |
| 1995 | 32 days |
| 1996 | 56 days |
| 1997 | 53 days |
| 1998 | 46 days |
| 1999 | 42 days |
| 2000 | 39 days |
| 2001 | 55 days |
| 2002 | 81 days |
| 2003 | 35 days |
| 2004 | 78 days |
| 2005 | 65 days |
| 2006 | 67 days |
| 2007 | 43 days |
| 2008 | 77 days |
| 2009 | 67 days |
| 2010 | 45 days |
| 2011 | 45 days |
| 2012 | 51 days |
| 2013 | 34 days |
| 2014 | 28 days |
| 2015 | 57 days |
| 2016 | 53 days |
| 2017 | 51 days |
| 2018 | 23 days |
| 2019 | 31 days |
| 2020 | 47 days |
| 2021 | 36 days |
| 2022 | 40 days |
| 2023 | 55 days |
| 2024 | 41 days |
| 2025 | 71 days |
| 2026 | 39 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
87 years with a frostAcross 87 years with a frost, the median last spring frost at Miles City AP falls on 10 May and the median first autumn frost on 1 October, which leaves a median of 147 days between them.
In 1996 to 2025 the median growing season was 144 days. That is 3 days fewer than in 1938 to 1967.
Fitted over all years, the growing season changes by +0.8 days per decade at this station.
| Measure | Median, all years | Earliest period (1938 to 1967) | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 10 May | 11 May | 11 May | no change | -0.5 days per decade |
| First autumn frost | 1 October | 30 September | 4 October | 4 days later | +0.3 days per decade |
| Growing days | 147 days | 147 days | 144 days | 3 days fewer | +0.8 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
89 years, 1937 to 2025A day with at least 32.4 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 81.5 mm (3.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 32.4 mm (1.3 in) | |
| 5 years | 44.8 mm (1.8 in) | |
| 10 years | 53.3 mm (2.1 in) | |
| 25 years | 64.4 mm (2.5 in) | |
| 50 years | 72.9 mm (2.9 in) | |
| 100 years | 81.5 mm (3.2 in) | Longer than the 89 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, 89 years of values from 1937 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: 73.9 mm (2.9 in) in 2016; 68.8 mm (2.7 in) in 1964; 67.8 mm (2.7 in) in 1941.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Miles City AP, at 2001. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2001 ran 0.3 C (0.5 F) lower than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 2001 | -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
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Miles City AP had a mean temperature of 8.2 C (46.8 F) and 317.3 mm (12.5 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Dinosaur Nm (United States, 731 km away), Cottonwood 2 E (United States, 418 km away) and Mission (United States, 538 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Dinosaur Nm | United States | 731 km (454 mi) | 8.3 C (46.9 F) | 289.0 mm (11.4 in) | 0.97 |
| Cottonwood 2 E | United States | 418 km (260 mi) | 8.1 C (46.6 F) | 422.1 mm (16.6 in) | 1.04 |
| Mission | United States | 538 km (334 mi) | 8.0 C (46.3 F) | 458.1 mm (18.0 in) | 1.13 |
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-15).