Granby
September
Weather in Granby for September 2025
Your guide to Granby weather in September - trends and predictions
In general, the average temperature in Granby at the beginning of September is 24.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.7 °C by the end of September.
Granby sees moderate rainfall in September, averaging 7 rainy days.
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23
Dry days
7
Rainy days
0
Snow days
22°/11°
Temperatures
12 km/h
Avg max wind
83 %
Avg humidity
Granby in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  24° | 2  19° | 3 23° | 4 26° | 5 26° | 6 27° | 7  25° |
| 8  20° | 9  18° | 10 17° | 11 20° | 12 22° | 13  21° | 14 20° |
| 15 22° | 16 22° | 17 23° | 18 23° | 19  21° | 20 21° | 21  21° |
| 22 21° | 23 20° | 24 21° | 25 18° | 26 17° | 27 20° | 28 21° |
| 29 20° | 30 21° |
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Temperatures trend during September in Granby
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. | Mist | 24° /9° | 3.4 mm | 5 | |
| 2 Sept. | Overcast | 19° /9° | 0.7 mm | 4 | |
| 3 Sept. | Overcast | 23° /10° | 0 mm | 6 | |
| 4 Sept. | Mist | 26° /13° | 0 mm | 7 | |
| 5 Sept. | Fog | 26° /15° | 0 mm | 6 | |
| 6 Sept. | Mist | 27° /16° | 0.1 mm | 6 | |
| 7 Sept. | Patchy light rain with thunder | 25° /14° | 8.7 mm | 6 | |
| 8 Sept. | Light rain shower | 20° /11° | 5 mm | 5 | |
| 9 Sept. | Cloudy | 18° /8° | 0 mm | 5 | |
| 10 Sept. | Light rain shower | 17° /10° | 2 mm | 4 | |
| 11 Sept. | Fog | 20° /11° | 2.3 mm | 5 | |
| 12 Sept. | Mist | 22° /12° | 0 mm | 6 | |
| 13 Sept. | Moderate or heavy rain shower | 21° /11° | 36.1 mm | 5 | |
| 14 Sept. | Mist | 20° /12° | 0.2 mm | 5 | |
| 15 Sept. | Mist | 22° /10° | 0 mm | 5 | |
| 16 Sept. | Overcast | 22° /12° | 0 mm | 5 | |
| 17 Sept. | Patchy rain possible | 23° /12° | 0.1 mm | 6 | |
| 18 Sept. | Fog | 23° /13° | 0.8 mm | 5 | |
| 19 Sept. | Moderate rain | 21° /14° | 14.9 mm | 5 | |
| 20 Sept. | Mist | 21° /11° | 0 mm | 5 | |
| 21 Sept. | Sunny | 21° /10° | 0 mm | 6 | |
| 22 Sept. | Mist | 21° /10° | 0 mm | 5 | |
| 23 Sept. | Overcast | 20° /11° | 0 mm | 5 | |
| 24 Sept. | Mist | 21° /11° | 0 mm | 6 | |
| 25 Sept. | Sunny | 18° /9° | 9.6 mm | 5 | |
| 26 Sept. | Sunny | 17° /9° | 87.5 mm | 5 | |
| 27 Sept. | Mist | 20° /8° | 1.5 mm | 5 | |
| 28 Sept. | Mist | 21° /11° | 0 mm | 5 | |
| 29 Sept. | Mist | 20° /11° | 0 mm | 5 | |
| 30 Sept. | Sunny | 21° /11° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Granby 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 Granby forecast closer to your planned date for the most up-to-date weather information.
Granby in September - FAQ
What are the expected maximum and minimum temperatures in Granby during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Granby during September?
Significant rainfall exceeding 129.1 mm is expected in Granby during September, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Granby during September?
The average wind speed in Granby during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Granby
Explore the daily rainfall trends and prepare for Granbys September weather 💧
UV exposure in Granby during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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