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Canada weather

Weather in Guelph for September 2025

Your guide to Guelph weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Guelph is cooler than usual, with temperatures averaging 20.6 °C, this is -2.6 °C below the typical seasonal average.

  • The forecast for the upcoming days in Guelph predicts a temperature of 24.2 °C, which is slightly above the historical average.

  • In general, the average temperature in Guelph at the beginning of September is 23.6 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 22.6 °C by the end of September.

    • Rain 🌧️

  • Guelph experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 56.2 mm.

    • More

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

Average dry days
21
Dry days
Average rainy days
9
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/12°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
74 %
Avg humidity

Guelph Weather September

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

Temperatures trend during September in Guelph

See the weather trend as well as the moving average line

September weather in Guelph day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 23° /10° 0.1 mm 6
2 Sept. Fog
Fog
 22° /10° 0.1 mm 5
3 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 27° /12° 0 mm 7
4 Sept. Overcast
Overcast
 25° /13° 11.1 mm 6
5 Sept. Overcast
Overcast
 26° /12° 0 mm 6
6 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 24° /13° 3.9 mm 5
7 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 18° /10° 4.3 mm 4
8 Sept. Mist
Mist
 19° /8° 0.1 mm 4
9 Sept. Overcast
Overcast
 23° /9° 0.2 mm 5
10 Sept. Overcast
Overcast
 23° /11° 0 mm 5
11 Sept. Partly cloudy
Partly cloudy
 24° /13° 0.9 mm 6
12 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 24° /12° 4 mm 6
13 Sept. Overcast
Overcast
 22° /12° 0 mm 5
14 Sept. Fog
Fog
 25° /9° 0 mm 1.1
15 Sept. Partly cloudy
Partly cloudy
 23° /12° 0 mm 1.4
16 Sept. Sunny
Sunny
 24° /11° 0 mm 1.3
17 Sept. Sunny
Sunny
 29° /13° 0 mm 1.3
18 Sept. Sunny
Sunny
 30° /14° 0 mm 0
19 Sept. Sunny
Sunny
 25° /15° 0 mm 5
20 Sept. Partly cloudy
Partly cloudy
 19° /12° 0.1 mm 5
21 Sept. Patchy rain possible
Patchy rain possible
 25° /13° 1.1 mm 4
22 Sept. Patchy rain possible
Patchy rain possible
 19° /8° 0.3 mm 3
23 Sept. Sunny
Sunny
 20° /7° 0 mm 4
24 Sept. Overcast
Overcast
 20° /10° 0 mm 3
25 Sept. Sunny
Sunny
 25° /10° 0 mm 5
26 Sept. Mist
Mist
 27° /13° 0 mm 4
27 Sept. Sunny
Sunny
 28° /14° 0 mm 5
28 Sept. Light drizzle
Light drizzle
 18° /11° 0.5 mm 5
29 Sept. Mist
Mist
 20° /13° 1.6 mm 5
30 Sept. Mist
Mist
 20° /13° 0 mm 5
Next
Important Notice
Our weather forecast for Guelph 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 Guelph forecast closer to your planned date for the most up-to-date weather information.
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Guelph in September - FAQ

What are the expected maximum and minimum temperatures in Guelph during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Guelph during September?
Moderate rainfall is anticipated in Guelph during September, with a total of 56.2 mm spread over approximately 9 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Guelph during September?
The average wind speed in Guelph during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Guelph

Explore the daily rainfall trends and prepare for Guelphs September weather 💧

UV exposure in Guelph during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Get accurate weather forecasts for Guelph, located at latitude 43.546 and longitude -80.256. Stay updated with localized weather information tailored for Guelph.

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