Banff climate by month
Averages and records for each calendar month at Banff , Canada, from 1887 to 2025. The warmest month is July, averaging 22.3°C; the coolest is January at −5.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −5.7°C | −15.6°C | 12.3°C26 January 2015 | −51.2°C25 January 1950 | 107 / 135 |
| February | −1.5°C | −13.3°C | 14.7°C27 February 1992 | −45.0°C25 February 1890 | 108 / 137 |
| March | 2.9°C | −9.6°C | 18.6°C21 March 2019 | −40.6°C8 March 1951 | 110 / 137 |
| April | 8.9°C | −3.5°C | 25.6°C20 April 1934 | −27.2°C2 April 1954 | 109 / 136 |
| May | 14.3°C | 0.7°C | 29.4°C25 May 1934 | −17.8°C1 May 1954 | 106 / 134 |
| June | 18.1°C | 4.3°C | 37.8°C30 June 2021 | −3.9°C18 June 1893 | 106 / 132 |
| July | 22.3°C | 6.5°C | 37.4°C1 July 2021 | −2.5°C16 July 1999 | 106 / 133 |
| August | 21.2°C | 5.6°C | 34.2°C11 August 2018 | −4.5°C24 August 1992 | 106 / 133 |
| September | 15.8°C | 2.1°C | 32.4°C4 September 2022 | −16.7°C24 September 1926 | 103 / 132 |
| October | 9.5°C | −1.5°C | 26.5°C2 October 1992 | −27.0°C31 October 1984 | 105 / 133 |
| November | 0.6°C | −8.2°C | 16.5°C2 November 1981 | −40.6°C26 November 1896 | 107 / 136 |
| December | −4.4°C | −12.9°C | 12.5°C16 December 1980 | −48.3°C17 December 1924 | 108 / 137 |
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 103 to 110 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.