Thief River Rgnl climate by month
Averages and records for each calendar month at Thief River Rgnl, United States, from 1903 to 2026. The warmest month is July, averaging 26.7°C; the coolest is January at −11.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −11.1°C | −23.0°C | 4.4°C9 January 1914 | −43.9°C11 January 1912 | 49 / 51 |
| February | −7.7°C | −19.6°C | 11.7°C25 February 1958 | −42.8°C11 February 1914 | 52 / 53 |
| March | −0.1°C | −11.9°C | 29.4°C27 March 1946 | −37.2°C1 March 1962 | 52 / 53 |
| April | 10.6°C | −1.7°C | 32.8°C27 April 1952 | −24.4°C1 April 1970 | 51 / 52 |
| May | 19.0°C | 4.4°C | 37.8°C21 May 1964 | −10.6°C3 May 1926 | 51 / 51 |
| June | 23.9°C | 10.4°C | 38.9°C29 June 1912 | −3.3°C1 June 1917 | 52 / 53 |
| July | 26.7°C | 13.0°C | 42.2°C29 July 1917 | 1.1°C15 July 1912 | 53 / 53 |
| August | 26.1°C | 11.7°C | 37.2°C9 August 1920 | −1.1°C26 August 1915 | 52 / 52 |
| September | 20.1°C | 6.4°C | 37.2°C8 September 1931 | −9.4°C18 September 1929 | 50 / 53 |
| October | 12.8°C | 0.5°C | 32.2°C6 October 1920 | −23.9°C26 October 1919 | 51 / 51 |
| November | 1.5°C | −7.8°C | 21.7°C8 November 1931 | −34.4°C30 November 1905 | 49 / 52 |
| December | −7.0°C | −17.3°C | 12.2°C1 December 1962 | −40.0°C31 December 1967 | 50 / 50 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 49 to 53 years each.
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Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.