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Weather in Granby for September 2025

Your guide to Granby weather in September - trends and predictions

    Temperatures

  • 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.

  • Rain 🌧️

  • Granby experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 173 mm.

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Average dry days
20
Dry days
Average rainy days
10
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/11°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Granby in September average weather

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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
Mist
24° /9° 3.4 mm 5
2 Sept. Overcast
Overcast
19° /9° 0.7 mm 4
3 Sept. Overcast
Overcast
23° /10° 0 mm 6
4 Sept. Mist
Mist
26° /13° 0 mm 7
5 Sept. Fog
Fog
26° /15° 0 mm 6
6 Sept. Mist
Mist
27° /16° 0.1 mm 6
7 Sept. Patchy light rain with thunder
Patchy light rain with thunder
25° /14° 8.7 mm 6
8 Sept. Light rain shower
Light rain shower
20° /11° 5 mm 5
9 Sept. Cloudy
Cloudy
18° /8° 0 mm 5
10 Sept. Light rain shower
Light rain shower
17° /10° 2 mm 4
11 Sept. Fog
Fog
20° /11° 2.3 mm 5
12 Sept. Mist
Mist
22° /12° 0 mm 6
13 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
21° /11° 36.1 mm 5
14 Sept. Mist
Mist
20° /12° 0.2 mm 5
15 Sept. Mist
Mist
22° /10° 0 mm 5
16 Sept. Overcast
Overcast
22° /12° 0 mm 5
17 Sept. Patchy rain possible
Patchy rain possible
23° /12° 0.1 mm 6
18 Sept. Fog
Fog
23° /13° 0.8 mm 5
19 Sept. Moderate rain
Moderate rain
21° /14° 14.9 mm 5
20 Sept. Mist
Mist
21° /11° 0 mm 5
21 Sept. Sunny
Sunny
21° /10° 0 mm 6
22 Sept. Mist
Mist
21° /10° 0 mm 5
23 Sept. Overcast
Overcast
20° /11° 0 mm 5
24 Sept. Mist
Mist
21° /11° 0 mm 6
25 Sept. Sunny
Sunny
18° /9° 9.6 mm 5
26 Sept. Sunny
Sunny
17° /9° 87.5 mm 5
27 Sept. Mist
Mist
20° /8° 1.5 mm 5
28 Sept. Mist
Mist
21° /11° 0 mm 5
29 Sept. Mist
Mist
20° /11° 0 mm 5
30 Sept. Sunny
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 21° 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 173 mm is expected in Granby during September, occurring over more than 10 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 13 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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Location coordinates Where is Granby?

Get accurate weather forecasts for Granby, located at latitude 45.4 and longitude -72.732. Stay updated with localized weather information tailored for Granby.

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