Fort St. John climate — normals and trends
Fort St. John (Canada) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 1.5 °C and it receives 460 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (15.9 °C on average) and the coldest is January (-14.9 °C). Rainfall peaks in June.
Fort St. John averages 192 frost days, 2 hot days (≥ 30 °C) and 95 rainy days per year.
Fort St. John has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 197 to 187 per year over the period.
The hottest day of the period reached 39.1 °C (on 29 June 2021) and the coldest -48.7 °C (on 31 January 1947).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Fort St. JohnBritish Columbia
- coords
- 56.25°, -120.85°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
1.5°C
Average daily high
6.5°C
Average daily low
-3.4°C
Annual rainfall
460mm
Sunshine / day
9.1h
Mean relative humidity
70%
Average peak wind
14.1km/h
Seasonal range
30.8°C
Frost days (< 0 °C)
192 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
95 d/yr
Annual snowfall
110.9 cm
Average feels-like high
3.0 °C
Average feels-like low
-7.1 °C
Average peak gust
32.8 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
12.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.27 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
39.1 °C
29 June 2021
Coldest day
-48.7 °C
31 January 1947
Wettest day
73 mm
16 August 1976
Windiest day
42.4 km/h
14 January 2014
Strongest gust
92.9 km/h
14 January 2014
Hottest feels-like
40.4 °C
29 June 2021
Coldest feels-like
-53.9 °C
31 January 1947
Snowiest day
15.5 cm
25 October 2017
Sunniest day
17.3 h
20 June 1955
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -4.4 °C | +6.6 °C | 20 mm | -6 mm |
| Feb | -9.7 °C | -3.2 °C | 13 mm | -7 mm |
| Mar | 2.4 °C | +2.9 °C | 10 mm | -13 mm |
| Apr | 12.5 °C | +4.2 °C | 10 mm | -14 mm |
| May | 18.4 °C | +2.9 °C | 17 mm | -28 mm |
| Jun | 20.1 °C | +0.8 °C | 67 mm | -5 mm |
| Jul | 22.4 °C | +0.9 °C | 46 mm | -25 mm |
| Aug | 23.9 °C | +3.4 °C | 35 mm | -16 mm |
| Sep | 20.1 °C | +4.8 °C | 13 mm | -28 mm |
| Oct | 9.4 °C | +1.7 °C | 45 mm | +14 mm |
| Nov | -0.6 °C | +2.5 °C | 30 mm | -1 mm |
| Dec | -16.4 °C | -7.1 °C | 99 mm | +73 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Fort St. John?
Fort St. John has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 1.5 °C and it receives 460 mm of precipitation per year.
What is the hottest day ever recorded in Fort St. John?
The hottest day measured in Fort St. John between 1940 and 2025 was 29 June 2021, reaching 39.1 °C.
What is the coldest day in Fort St. John?
The coldest day measured in Fort St. John between 1940 and 2025 was 31 January 1947, at -48.7 °C.
Does it snow in Fort St. John?
Yes. Fort St. John gets on average 110.9 cm of snow per year and has around 192 frost days.
Has the climate of Fort St. John warmed?
Yes: Fort St. John warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Fort St. John?
The wettest day measured in Fort St. John between 1940 and 2025 was 16 August 1976, with 73 mm of rain in 24 hours.
What was the windiest day in Fort St. John?
The windiest day measured in Fort St. John between 1940 and 2025 was 14 January 2014, with winds reaching 42.4 km/h.
What is the warmest month in Fort St. John?
The warmest month in Fort St. John is July (15.9 °C on average); the coldest is January (-14.9 °C).
How much does it rain in Fort St. John?
Fort St. John receives on average 460 mm of precipitation per year, spread over about 95 rainy days.
Is it sunny in Fort St. John?
Fort St. John gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
What is the biggest single-day snowfall in Fort St. John?
The heaviest 24-hour snowfall measured in Fort St. John between 1940 and 2025 was 25 October 2017, with 15.5 cm.
Are there tropical nights in Fort St. John?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Fort St. John.
What was the most extreme apparent temperature in Fort St. John?
In Fort St. John, between 1940 and 2025, the highest apparent temperature reached 40.4 °C on 29 June 2021, and the lowest was -53.9 °C on 31 January 1947.
Compare Fort St. John with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Fort St. John