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Weather in Granby for September 2025

Your guide to Granby weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Granby has been nearly identical to the historical average, with a temperature of 21.8 °C (showing only a slight deviation of -0.5 °C).

  • Expect cooler weather in the next days in Granby with the forecast suggesting a temperature of 19.9 °C, lower than the historical average.

  • In general, the average temperature in Granby at the beginning of September is 24 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.1 °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.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

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 Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Mist
24°
2
Overcast
21°
3
Overcast
23°
4
Mist
26°
5
Fog
26°
6
Mist
25°
7
Patchy light rain with thunder
23°
8
Light rain shower
20°
9
Sunny
20°
10
Light rain shower
19°
11
Fog
20°
12
Mist
21°
13
Moderate or heavy rain shower
20°
14
Cloudy
22°
15
Partly cloudy
21°
16
Sunny
24°
17
Sunny
25°
18
Sunny
26°
19
Patchy rain possible
18°
20
Sunny
16°
21
Partly cloudy
24°
22
Moderate rain
14°
23
Partly cloudy
16°
24
Sunny
20°
25
Patchy rain possible
22°
26
Sunny
13°
27
Sunny
17°
28
Mist
21°
29
Mist
20°
30
Sunny
21°

Temperatures trend during September in Granby

See the weather trend as well as the moving average line

September weather in Granby day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Mist
Mist
 24° /10° 2.3 mm 5
2 Sept. Overcast
Overcast
 21° /11° 0.5 mm 4
3 Sept. Overcast
Overcast
 23° /12° 0 mm 5
4 Sept. Mist
Mist
 26° /14° 0 mm 7
5 Sept. Fog
Fog
 26° /14° 11.3 mm 6
6 Sept. Mist
Mist
 25° /15° 13.5 mm 5
7 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 23° /12° 6.4 mm 5
8 Sept. Light rain shower
Light rain shower
 20° /10° 3.4 mm 4
9 Sept. Sunny
Sunny
 20° /8° 0 mm 5
10 Sept. Light rain shower
Light rain shower
 19° /10° 1.3 mm 5
11 Sept. Fog
Fog
 20° /11° 1.6 mm 5
12 Sept. Mist
Mist
 21° /10° 0 mm 5
13 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 20° /11° 25.3 mm 5
14 Sept. Cloudy
Cloudy
 22° /14° 0 mm 0.6
15 Sept. Partly cloudy
Partly cloudy
 21° /10° 0 mm 1.2
16 Sept. Sunny
Sunny
 24° /11° 0 mm 1.2
17 Sept. Sunny
Sunny
 25° /12° 0 mm 1.2
18 Sept. Sunny
Sunny
 26° /15° 0 mm 0
19 Sept. Patchy rain possible
Patchy rain possible
 18° /7° 0.2 mm 3
20 Sept. Sunny
Sunny
 16° /4° 0 mm 3
21 Sept. Partly cloudy
Partly cloudy
 24° /6° 0 mm 5
22 Sept. Moderate rain
Moderate rain
 14° /10° 9.9 mm 3
23 Sept. Partly cloudy
Partly cloudy
 16° /8° 0 mm 4
24 Sept. Sunny
Sunny
 20° /7° 0 mm 4
25 Sept. Patchy rain possible
Patchy rain possible
 22° /9° 3.8 mm 3
26 Sept. Sunny
Sunny
 13° /5° 0 mm 3
27 Sept. Sunny
Sunny
 17° /3° 0 mm 3
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
Next
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.
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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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