Fort St. John in Summer
In summer (June, July and August), Fort St. John sees average daytime highs around 21°C and overnight lows near 9°C, with 201 mm of rain over about 31 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 21°C. The sky is clear or mostly clear about 24% of the time across summer, and the air most often feels dry.
Summer is Fort St. John's best season of the year to visit on our travel score. For the whole year in context, see Fort St. John's year-round climate.
- Avg daytime high
- 21°C
- warmest season of the year
- Avg overnight low
- 9°C
- Rainfall
- 201 mm
- 31 wet days
- Avg wind
- 9 km/h
- Travel score
- 6.3
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Fort St. John in Summer
Across summer, daytime highs hold fairly steady around 21°C.
A typical summer day in Fort St. John reaches about 21°C and drops to 9°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Fort St. John
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Fort St. John weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -9° / -17° | 25 | 7.1 | 7.6 | 7.3 | 0.0 |
| Feb | -6° / -14° | 16 | 4.5 | 5.3 | 9.1 | 0.0 |
| Mar | -0° / -10° | 23 | 6.6 | 7.1 | 11.4 | 0.0 |
| Apr | 9° / -2° | 25 | 5.7 | 3.4 | 13.8 | 1.8 |
| May | 16° / 4° | 40 | 8.2 | 1.1 | 16 | 5.1 |
| Jun | 20° / 8° | 75 | 10.9 | 0 | 17.3 | 6.0 |
| Jul | 22° / 10° | 80 | 11.3 | 0 | 16.8 | 6.4 |
| Aug | 21° / 9° | 47 | 8.6 | 0 | 14.9 | 6.6 |
| Sep | 15° / 5° | 43 | 8.1 | 0.5 | 12.5 | 4.8 |
| Oct | 7° / -1° | 33 | 7.3 | 3.7 | 10.1 | 1.2 |
| Nov | -3° / -10° | 31 | 7.4 | 7.3 | 7.9 | 0.0 |
| Dec | -8° / -15° | 23 | 5.6 | 6.4 | 6.7 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 24% of the time across summer.
Chance of precipitation in Summer
Fort St. John gets around 201 mm of rain over 31 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 9 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 16 h 54 min in early June to 13 h 42 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.7 kWh/m².
Is summer a good time to visit Fort St. John?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Fort St. John for sightseeing.
What to pack for Fort St. John in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Fort St. John sees daytime highs around 21°C and nights near 9°C. Pack sun protection. Worth having: rain gear. About 31 days see rain.
UV index in Fort St. John in Summer
Clear-sky midday UV across summer averages around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Fort St. John peaks around July 13 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 19 at about 0 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 5 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 0 | 1 | 2 | 3 | 4 | 6 | 7 | 4 | 3 | 1 | 1 | 0 |
| Level | Low | Low | Moderate | Moderate | Moderate | High | High | Moderate | Moderate | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 0 | Low |
| Feb | 1 | Low |
| Mar | 2 | Moderate |
| Apr | 3 | Moderate |
| May | 4 | Moderate |
| Jun | 6 | High |
| Jul | 7 | High |
| Aug | 4 | Moderate |
| Sep | 3 | Moderate |
| Oct | 1 | Low |
| Nov | 1 | Low |
| Dec | 0 | Low |
Air quality in Fort St. John in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Fort St. John is worst in May — around 22 µg/m³ PM2.5 (moderate), about 5.3× the cleanest month (March, 4 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Fort St. John's WHO annual average of 9 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 7 | 5 | 4 | 6 | 22 | 8 | 12 | 9 | 6 | 7 | 12 | 11 |
| Level | Good | Good | Good | Good | Moderate | Good | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 7 | Good |
| Feb | 5 | Good |
| Mar | 4 | Good |
| Apr | 6 | Good |
| May | 22 | Moderate |
| Jun | 8 | Good |
| Jul | 12 | Good |
| Aug | 9 | Good |
| Sep | 6 | Good |
| Oct | 7 | Good |
| Nov | 12 | Good |
| Dec | 11 | Good |
Where is Fort St. John?
Fort St. John sits at 56.2°N, 120.9°W, 696 m above sea level, in Canada. The nearest listed city is Grande Prairie, 176 km away.
Topography around Fort St. John
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Fort St. John.
Within 3 km, the terrain around Fort St. John has only modest variations in elevation — a maximum elevation change of 126 m around an average of 685 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 466 m; within 80 km, large variations in elevation — a maximum elevation change of 963 m.
The land around Fort St. John is covered by artificial surfaces (32%), trees (26%) and grassland (25%) within 3 km, trees (50%) and grassland (24%) within 16 km, and trees (67%) and grassland (20%) within 80 km.
Canada travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 83% of US
- price level, 2025
- GDP per capita
- $55,698
- 2025
- Happiness
- 6.7 / 10
- World Happiness, 2025
- Safe drinking water
- 97%
- of population, 2024
- Homicide rate
- 2
- per 100k, 2023
- Road deaths
- 5.3
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Fort St. John (56.2499°, -120.8529°, elevation 696 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.