Fort St John, B. C. weather by month
Averages and records for each calendar month at Fort St John, B. C., Canada, from 2012 to 2024. The warmest month is July, averaging 22.6°C; the coolest is December at −7.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −6.3°C | −14.0°C | 12.9°C29 January 2024 | −40.6°C14 January 2024 | 12 / 12 |
| February | −6.3°C | −14.9°C | 11.1°C9 February 2016 | −36.3°C9 February 2021 | 11 / 12 |
| March | 0.0°C | −9.8°C | 19.5°C17 March 2024 | −33.1°C1 March 2014 | 12 / 12 |
| April | 8.6°C | −2.2°C | 28.5°C18 April 2016 | −23.1°C1 April 2018 | 11 / 12 |
| May | 17.4°C | 4.7°C | 30.9°C15 May 2023 | −6.8°C6 May 2014 | 11 / 11 |
| June | 20.9°C | 9.0°C | 38.1°C29 June 2021 | −0.3°C5 June 2014 | 10 / 11 |
| July | 22.6°C | 10.8°C | 32.5°C12 July 2014 | 3.6°C14 July 2013 | 11 / 11 |
| August | 22.0°C | 9.9°C | 30.7°C25 August 2022 | 0.9°C22 August 2015 | 11 / 11 |
| September | 16.5°C | 4.8°C | 29.8°C12 September 2013 | −6.6°C22 September 2018 | 11 / 11 |
| October | 8.1°C | −0.7°C | 24.7°C1 October 2022 | −17.6°C25 October 2023 | 11 / 11 |
| November | −1.9°C | −9.8°C | 14.4°C2 November 2020 | −31.2°C29 November 2014 | 11 / 11 |
| December | −7.5°C | −15.2°C | 8.5°C13 December 2023 | −40.2°C21 December 2022 | 11 / 12 |
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 10 to 12 years each.
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Climate at nearby stations
The closest stations with twelve months of archive of their own, nearest first.
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.