Climate and average weather in Fort St. John
In Fort St. John, the summers are mild, showery, and partly cloudy and the winters are frigid, snowy, and partly cloudy.
Over the course of the year, the temperature in Fort St. John typically varies from -17°C to 22°C, and is rarely below -32°C or above 28°C. July is the hottest month of the year, while January is the coldest.
Based on the travel score, the best time of year to visit Fort St. John for warm-weather activities is from late May to early September.
- Hottest
- Jul
- 22°
- Coldest
- Jan
- -17°
- Wettest
- Jul
- 80 mm
- Driest
- Feb
- 16 mm
- Rain / yr
- 459 mm
- 91 wet days
- Daylight
- 6.6–17.4 h
- shortest–longest
- Elevation
- 696 m
- 56.2°N
- Clearest
- Aug
- 59% cloud
Fort St. John is city in British Columbia, Canada.
- Air quality
- Good
- PM2.5 9 µg/m³ · 2018
- Density
- 946/km²
- people per km²
- Founded
- 1975
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Fort St. John weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around late May to early September.
Temperature through the year
Daily average highs and lows in Fort St. John, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 4.5 months, from May 8 to September 22, with daily high temperatures above 14°C. The hottest month of the year in Fort St. John is July, with an average high of 22°C and low of 10°C.
The cool season lasts 3.3 months, from November 19 to February 25, with daily high temperatures below -4°C. The coldest month of the year in Fort St. John is January, with an average low of -17°C and high of -9°C.
Days typically run about 10°C warmer than nights, with the widest day–night swing (around 12°C) in May.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | -9 | -5 | 0 | 9 | 16 | 20 | 22 | 21 | 15 | 7 | -3 | -8 |
| Avg low (°C) | -17 | -14 | -10 | -2 | 4 | 8 | 10 | 9 | 5 | -1 | -10 | -15 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | -9 | -17 |
| Feb | -5 | -14 |
| Mar | 0 | -10 |
| Apr | 9 | -2 |
| May | 16 | 4 |
| Jun | 20 | 8 |
| Jul | 22 | 10 |
| Aug | 21 | 9 |
| Sep | 15 | 5 |
| Oct | 7 | -1 |
| Nov | -3 | -10 |
| Dec | -8 | -15 |
How hot and cold Fort St. John really feels
The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.
On the coldest nights, wind chill pulls the feels-like down to about -25°C (around January 5), with roughly 227 freezing days a year (feels-like at or below 0°C) — 151 of them bitterly cold — worst in January.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | -9 | -5 | 0 | 9 | 16 | 20 | 22 | 21 | 15 | 7 | -3 | -8 |
| Air high (°C) | -9 | -5 | 0 | 9 | 16 | 20 | 22 | 21 | 15 | 7 | -3 | -8 |
| Feels-like low (°C) | -23 | -20 | -15 | -6 | 1 | 7 | 10 | 8 | 2 | -5 | -15 | -22 |
| Air low (°C) | -17 | -14 | -10 | -2 | 4 | 8 | 10 | 9 | 5 | -1 | -10 | -15 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | -9 | -9 | -23 | -17 |
| Feb | -5 | -5 | -20 | -14 |
| Mar | 0 | 0 | -15 | -10 |
| Apr | 9 | 9 | -6 | -2 |
| May | 16 | 16 | 1 | 4 |
| Jun | 20 | 20 | 7 | 8 |
| Jul | 22 | 22 | 10 | 10 |
| Aug | 21 | 21 | 8 | 9 |
| Sep | 15 | 15 | 2 | 5 |
| Oct | 7 | 7 | -5 | -1 |
| Nov | -3 | -3 | -15 | -10 |
| Dec | -8 | -8 | -22 | -15 |
Average hourly temperature in Fort St. John
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on July afternoons, near 22°C, and coldest before dawn in January, near -17°C.
Fort St. John weather by month
Every month at a glance. Click a month for its detailed page.
| 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 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Fort St. John gets about 459 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.
The wetter season lasts 4.3 months, from around May 11 to Sep 18, peaking in July at about 40% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Feb 12.
July is the wettest month by volume, with 80 mm over about 11 wet days; February is the driest, with 16 mm. Some of the cold-season precipitation falls as snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 21 | 18 | 21 | 20 | 27 | 36 | 36 | 28 | 26 | 24 | 24 | 19 |
| Rain days | 7 | 5 | 7 | 6 | 8 | 11 | 11 | 9 | 8 | 7 | 7 | 6 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 21 | 7 |
| Feb | 18 | 5 |
| Mar | 21 | 7 |
| Apr | 20 | 6 |
| May | 27 | 8 |
| Jun | 36 | 11 |
| Jul | 36 | 11 |
| Aug | 28 | 9 |
| Sep | 26 | 8 |
| Oct | 24 | 7 |
| Nov | 24 | 7 |
| Dec | 19 | 6 |
Monthly rainfall
Over a full year, Fort St. John collects about 459 mm of rain across 91 wet days — roughly 38 mm in an average month.
It doesn’t fall evenly. July is the wettest month with 80 mm, while February is the driest at just 16 mm. The three wettest months alone bring about 44% of the year’s total, and some of the cold-season precipitation falls as snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 25 | 16 | 23 | 25 | 40 | 75 | 80 | 47 | 43 | 33 | 31 | 23 |
| Rain days | 7 | 5 | 7 | 6 | 8 | 11 | 11 | 9 | 8 | 7 | 7 | 6 |
| Snow days | 8 | 5 | 7 | 3 | 1 | 0 | 0 | 0 | 1 | 4 | 7 | 6 |
| Rainfall (mm) | Rain days | Snow days | |
|---|---|---|---|
| Jan | 25 | 7 | 8 |
| Feb | 16 | 5 | 5 |
| Mar | 23 | 7 | 7 |
| Apr | 25 | 6 | 3 |
| May | 40 | 8 | 1 |
| Jun | 75 | 11 | 0 |
| Jul | 80 | 11 | 0 |
| Aug | 47 | 9 | 0 |
| Sep | 43 | 8 | 1 |
| Oct | 33 | 7 | 4 |
| Nov | 31 | 7 | 7 |
| Dec | 23 | 6 | 6 |
Snow in Fort St. John
Average snowy days through the year, the snow-season span, and estimated snowfall — for ski trips and the perennial 'will there be snow at Christmas?' question.
Fort St. John averages about 42 snowy days a year. Snow season runs roughly Sep 16 to May 25 — about 8.3 months.
March is snowiest, with roughly 7 days of snow and an estimated 28 cm of snowfall. Over the year that adds up to an estimated 175 cm of snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snow days | 8 | 5 | 7 | 3 | 1 | 0 | 0 | 0 | 1 | 4 | 7 | 6 |
| Snowfall (cm) | 26 | 21 | 28 | 16 | 6 | 0 | 0 | 0 | 4 | 17 | 32 | 26 |
| Snow days | Snowfall (cm) | |
|---|---|---|
| Jan | 8 | 26 |
| Feb | 5 | 21 |
| Mar | 7 | 28 |
| Apr | 3 | 16 |
| May | 1 | 6 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 1 | 4 |
| Oct | 4 | 17 |
| Nov | 7 | 32 |
| Dec | 6 | 26 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Fort St. John, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.
The clearer part of the year begins around June 16 and lasts for 4.0 months, ending around October 14. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 49% of the time on average.
The cloudier part of the year begins around October 15 and lasts for 3.6 months, ending around February 1. The cloudiest month is November, when it is overcast or mostly cloudy 68% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 35 | 37 | 37 | 35 | 38 | 39 | 46 | 49 | 44 | 39 | 32 | 35 |
| Cloudier (%) | 65 | 63 | 63 | 65 | 62 | 61 | 54 | 51 | 56 | 61 | 68 | 65 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 35 | 65 |
| Feb | 37 | 63 |
| Mar | 37 | 63 |
| Apr | 35 | 65 |
| May | 38 | 62 |
| Jun | 39 | 61 |
| Jul | 46 | 54 |
| Aug | 49 | 51 |
| Sep | 44 | 56 |
| Oct | 39 | 61 |
| Nov | 32 | 68 |
| Dec | 35 | 65 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 17, brings about 17 h 24 min of light; the shortest, around December 16, only 6 h 36 min — a swing of roughly 10 h 48 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 7.3 | 9.1 | 11.4 | 13.8 | 16.0 | 17.3 | 16.8 | 14.9 | 12.5 | 10.1 | 7.9 | 6.7 |
| Sunrise (AM) | 9:36 | 8:44 | 7:31 | 6:07 | 4:58 | 4:23 | 4:44 | 5:41 | 6:44 | 7:46 | 8:53 | 9:40 |
| Sunset (PM) | 4:50 | 5:52 | 6:56 | 8:00 | 9:02 | 9:44 | 9:34 | 8:34 | 7:12 | 5:50 | 4:44 | 4:19 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 7.3 | 9:36 | 4:50 |
| Feb | 9.1 | 8:44 | 5:52 |
| Mar | 11.4 | 7:31 | 6:56 |
| Apr | 13.8 | 6:07 | 8:00 |
| May | 16.0 | 4:58 | 9:02 |
| Jun | 17.3 | 4:23 | 9:44 |
| Jul | 16.8 | 4:44 | 9:34 |
| Aug | 14.9 | 5:41 | 8:34 |
| Sep | 12.5 | 6:44 | 7:12 |
| Oct | 10.1 | 7:46 | 5:50 |
| Nov | 7.9 | 8:53 | 4:44 |
| Dec | 6.7 | 9:40 | 4:19 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Fort St. John averages about 7 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 5 and 9 days.
The sunnier stretch runs 3.1 months, from around Jul 12 to Oct 12. The sunniest month is July, with roughly 8 sunny days (gloomy).
The greyest month is April, down near 6 sunny days — about 23% fewer than the July peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 7 | 7 | 7 | 6 | 6 | 6 | 8 | 8 | 8 | 7 | 6 | 7 |
| Sky | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Mixed | Mixed | Gloomy | Gloomy | Gloomy |
| Sunny days | Sky | |
|---|---|---|
| Jan | 7 | Gloomy |
| Feb | 7 | Gloomy |
| Mar | 7 | Gloomy |
| Apr | 6 | Gloomy |
| May | 6 | Gloomy |
| Jun | 6 | Gloomy |
| Jul | 8 | Gloomy |
| Aug | 8 | Mixed |
| Sep | 8 | Mixed |
| Oct | 7 | Gloomy |
| Nov | 6 | Gloomy |
| Dec | 7 | Gloomy |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Fort St. John, the air stays dry or comfortable essentially all year. Even in July, the muggiest month, it feels humid or worse only about 0% of the time — humidity is not something you need to plan around here.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 99 | 92 | 94 | 100 | 100 | 100 | 100 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 1 | 8 | 6 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | |
|---|---|---|
| Jan | 100 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 99 | 1 |
| Jul | 92 | 8 |
| Aug | 94 | 6 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 100 | 0 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Wind in Fort St. John is steady company: average speeds sit near 10 km/h — calm — in every month of the year, with no meaningful windy or calm season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 9 | 9 | 9 | 10 | 10 | 10 | 9 | 9 | 10 | 10 | 10 | 10 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 9 | calm |
| Feb | 9 | calm |
| Mar | 9 | calm |
| Apr | 10 | calm |
| May | 10 | calm |
| Jun | 10 | calm |
| Jul | 9 | calm |
| Aug | 9 | calm |
| Sep | 10 | calm |
| Oct | 10 | calm |
| Nov | 10 | calm |
| Dec | 10 | calm |
Best time to visit Fort St. John
To characterize how pleasant the weather is in Fort St. John throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around early June, Fort St. John is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Fort St. John for general outdoor tourist activities is from late May to early September, with a peak score in the first week of August.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 0.0 | 0.0 | 0.0 | 1.9 | 5.0 | 6.0 | 6.4 | 6.6 | 4.8 | 1.3 | 0.0 | 0.0 |
| Rating | poor | poor | poor | poor | fair | good | good | good | fair | poor | poor | poor |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 0.0 | poor |
| Feb | 0.0 | poor |
| Mar | 0.0 | poor |
| Apr | 1.9 | poor |
| May | 5.0 | fair |
| Jun | 6.0 | good |
| Jul | 6.4 | good |
| Aug | 6.6 | good |
| Sep | 4.8 | fair |
| Oct | 1.3 | poor |
| Nov | 0.0 | poor |
| Dec | 0.0 | poor |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Fort St. John for hot-weather activities is from mid July to mid August, with a peak score in the last week of July.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Fort St. John, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
For a warm-season trip around July (highs near 22°C), the essentials are rain gear and sun protection. In the cold season around January (highs near -9°C), pack a warm layer and a heavy coat.
In July, Fort St. John sees daytime highs around 22°C and nights near 10°C. Worth packing: rain gear and sun protection. About 11 days see rain.
UV index (midday) in Fort St. John by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
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 |
Average hourly UV index in Fort St. John
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in July the burn window is concentrated in the middle of the day: about 8 hours a day reach index 3 (protection recommended), and 3 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 0 | 0 | 0 | 1.5 | 5.5 | 7.5 | 8 | 5 | 0 | 0 | 0 | 0 |
| UV ≥ 6 (h/day) | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 0 | 0 | 0 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 0 | 0 |
| Feb | 0 | 0 |
| Mar | 0 | 0 |
| Apr | 1.5 | 0 |
| May | 5.5 | 0 |
| Jun | 7.5 | 1 |
| Jul | 8 | 3 |
| Aug | 5 | 0 |
| Sep | 0 | 0 |
| Oct | 0 | 0 |
| Nov | 0 | 0 |
| Dec | 0 | 0 |
Air quality in Fort St. John by month
Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly 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 |
Growing season
The growing season in Fort St. John typically lasts about 168 days, from around April 26 to October 10 — the span where a frost-free day is more likely than not. It is reliably frost-free from May 21 to September 14.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 6 | 5 | 11 | 34 | 82 | 100 | 100 | 100 | 88 | 41 | 9 | 5 |
| Frost nights | 31 | 28 | 31 | 30 | 20 | 0 | 0 | 0 | 18 | 31 | 30 | 31 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 6 | 31 |
| Feb | 5 | 28 |
| Mar | 11 | 31 |
| Apr | 34 | 30 |
| May | 82 | 20 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 88 | 18 |
| Oct | 41 | 31 |
| Nov | 9 | 30 |
| Dec | 5 | 31 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Fort St. John banks about 494 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 0 | 0 | 0 | 0 | 20 | 122 | 186 | 148 | 17 | 0 | 0 | 0 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 0 |
| Apr | 0 |
| May | 20 |
| Jun | 122 |
| Jul | 186 |
| Aug | 148 |
| Sep | 17 |
| Oct | 0 |
| Nov | 0 |
| Dec | 0 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Fort St. John receives about 3.4 kWh/m² a day of solar energy on average — moderate — with a clear seasonal swing between 0.5 and 6.2 kWh/m².
The brighter stretch of the year lasts 6.0 months, from around Mar 18 to Sep 15. The brightest month is June, averaging about 6.2 kWh/m² (intense).
The dimmest month is December, down near 0.6 kWh/m² — roughly 91% less than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 0.8 | 1.7 | 3.3 | 4.9 | 5.9 | 6.2 | 6.0 | 5.0 | 3.4 | 1.9 | 0.9 | 0.5 |
| Level | Dim | Dim | Moderate | Bright | Bright | Intense | Bright | Bright | Moderate | Dim | Dim | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 0.8 | Dim |
| Feb | 1.7 | Dim |
| Mar | 3.3 | Moderate |
| Apr | 4.9 | Bright |
| May | 5.9 | Bright |
| Jun | 6.2 | Intense |
| Jul | 6.0 | Bright |
| Aug | 5.0 | Bright |
| Sep | 3.4 | Moderate |
| Oct | 1.9 | Dim |
| Nov | 0.9 | Dim |
| Dec | 0.5 | Dim |
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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).