Fort St. John
September
Weather in Fort St. John for September 2025
Your guide to Fort St. John weather in September - trends and predictions
In general, the average temperature in Fort St. John at the beginning of September is 21.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13 °C by the end of September.
Fort St. John experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 25.2 mm.
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Temperatures
Rain 🌧️
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22
Dry days
8
Rainy days
0
Snow days
18°/6°
Temperatures
19 km/h
Avg max wind
61 %
Avg humidity
Fort St. John in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2 22° | 3  17° | 4  18° | 5  23° | 6 22° | 7  23° |
| 8 21° | 9 17° | 10 22° | 11  19° | 12 21° | 13 19° | 14 18° |
| 15 22° | 16 18° | 17 18° | 18 16° | 19 12° | 20 14° | 21 18° |
| 22  20° | 23 20° | 24  15° | 25 17° | 26 15° | 27 12° | 28 12° |
| 29 9° | 30 11° |
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Temperatures trend during September in Fort St. John
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 27° /10° | 0 mm | 7 | |
| 2 Sept. | Sunny | 22° /9° | 2.1 mm | 6 | |
| 3 Sept. | Patchy rain possible | 17° /6° | 1.1 mm | 4 | |
| 4 Sept. | Mist | 18° /4° | 0 mm | 5 | |
| 5 Sept. | Thundery outbreaks possible | 23° /6° | 0.1 mm | 6 | |
| 6 Sept. | Thundery outbreaks possible | 22° /9° | 0 mm | 6 | |
| 7 Sept. | Partly cloudy | 23° /8° | 0 mm | 7 | |
| 8 Sept. | Sunny | 21° /8° | 0.5 mm | 6 | |
| 9 Sept. | Sunny | 17° /5° | 2.6 mm | 5 | |
| 10 Sept. | Sunny | 22° /5° | 0 mm | 6 | |
| 11 Sept. | Overcast | 19° /6° | 0.3 mm | 5 | |
| 12 Sept. | Overcast | 21° /7° | 0 mm | 5 | |
| 13 Sept. | Partly cloudy | 19° /8° | 0 mm | 5 | |
| 14 Sept. | Sunny | 18° /6° | 0.9 mm | 5 | |
| 15 Sept. | Overcast | 22° /5° | 0 mm | 5 | |
| 16 Sept. | Overcast | 18° /6° | 0 mm | 5 | |
| 17 Sept. | Partly cloudy | 18° /7° | 4.5 mm | 5 | |
| 18 Sept. | Sunny | 16° /7° | 0 mm | 5 | |
| 19 Sept. | Overcast | 12° /4° | 0 mm | 3 | |
| 20 Sept. | Partly cloudy | 14° /4° | 0 mm | 4 | |
| 21 Sept. | Partly cloudy | 18° /4° | 0 mm | 5 | |
| 22 Sept. | Cloudy | 20° /8° | 0 mm | 5 | |
| 23 Sept. | Partly cloudy | 20° /6° | 0 mm | 5 | |
| 24 Sept. | Light rain | 15° /8° | 2.3 mm | 4 | |
| 25 Sept. | Mist | 17° /3° | 2 mm | 4 | |
| 26 Sept. | Mist | 15° /4° | 0.6 mm | 4 | |
| 27 Sept. | Thundery outbreaks possible | 12° /5° | 3.5 mm | 3 | |
| 28 Sept. | Light rain | 12° /3° | 3.7 mm | 3 | |
| 29 Sept. | Light drizzle | 9° /3° | 0.3 mm | 2 | |
| 30 Sept. | Thundery outbreaks possible | 11° /2° | 0.6 mm | 3 | |
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Important Notice
Our weather forecast for Fort St. John in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Fort St. John forecast closer to your planned date for the most up-to-date weather information.
Fort St. John in September - FAQ
What are the expected maximum and minimum temperatures in Fort St. John during September?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 6°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Fort St. John during September?
In September, Fort St. John can expect light to moderate rainfall, totaling 25.2 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Fort St. John during September?
The average wind speed in Fort St. John during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Fort St. John
Explore the daily rainfall trends and prepare for Fort St. Johns September weather 💧
UV exposure in Fort St. John during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Fort St. John?Get accurate weather forecasts for Fort St. John, located at latitude 56.25 and longitude -120.853. Stay updated with localized weather information tailored for Fort St. John.
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