Kalispell/Glacier Park Intl climate by month
Averages and records for each calendar month at Kalispell/Glacier Park Intl, United States, from 1896 to 2026. The warmest month is July, averaging 27.4°C; the coolest is January at −1.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −1.5°C | −9.6°C | 13.3°C27 January 1934 | −38.9°C30 January 1950 | 128 / 129 |
| February | 1.2°C | −8.1°C | 17.8°C24 February 1995 | −37.8°C1 February 1950 | 128 / 128 |
| March | 6.5°C | −4.3°C | 22.8°C30 March 2004 | −33.9°C3 March 1960 | 129 / 129 |
| April | 12.8°C | −0.1°C | 29.4°C18 April 1936 | −22.2°C1 April 1936 | 129 / 129 |
| May | 18.1°C | 4.1°C | 35.0°C27 May 1936 | −8.3°C1 May 1899 | 129 / 129 |
| June | 21.9°C | 7.5°C | 38.9°C28 June 2015 | −3.3°C7 June 1999 | 130 / 130 |
| July | 27.4°C | 9.7°C | 40.0°C19 July 1960 | −1.1°C3 July 1999 | 131 / 131 |
| August | 26.6°C | 8.8°C | 40.6°C4 August 1961 | −1.1°C25 August 1910 | 131 / 131 |
| September | 20.3°C | 4.5°C | 37.2°C1 September 1967 | −13.9°C24 September 1926 | 130 / 131 |
| October | 12.8°C | −0.3°C | 30.0°C2 October 1992 | −20.0°C31 October 1935 | 129 / 129 |
| November | 4.1°C | −4.1°C | 20.6°C12 November 1999 | −33.3°C16 November 1959 | 129 / 129 |
| December | −0.6°C | −7.8°C | 16.7°C1 December 2021 | −37.2°C30 December 1968 | 130 / 130 |
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 128 to 131 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.