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Canada weather

Weather in Guelph for September 2026

Your guide to Guelph weather in September - trends and predictions

    Temperatures

  • So far, September 2026 in Guelph is slightly warmer than the historical average by 1.9 °C.

  • Expect cooler weather in the next days in Guelph with the forecast suggesting a temperature of 20.5 °C, lower than the historical average.

  • In general, the average temperature in Guelph at the beginning of September is 24.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.4 °C by the end of September.

    • Rain 🌧️

  • Guelph experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 77 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
22°/11°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
75 %
Avg humidity

Guelph Weather September

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

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
 26° /12° 0.1 mm 7
2 Sept. Fog
Fog
 24° /12° 23 mm 4
3 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 27° /13° 0.2 mm 5
4 Sept. Overcast
Overcast
 25° /13° 8.4 mm 6
5 Sept. Overcast
Overcast
 26° /12° 0 mm 6
6 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 24° /13° 2.9 mm 6
7 Sept. Overcast
Overcast
 19° /10° 3.2 mm 4
8 Sept. Mist
Mist
 21° /9° 0.1 mm 4
9 Sept. Overcast
Overcast
 23° /10° 3.3 mm 4
10 Sept. Overcast
Overcast
 23° /12° 0.3 mm 5
11 Sept. Partly cloudy
Partly cloudy
 24° /11° 0.7 mm 6
12 Sept. Sunny
Sunny
 25° /11° 1.5 mm 6.1
13 Sept. Overcast
Overcast
 22° /12° 0.6 mm 5.8
14 Sept. Sunny
Sunny
 18° /8° 0 mm 5.7
15 Sept. Overcast
Overcast
 19° /10° 2.5 mm 4
16 Sept. Overcast
Overcast
 25° /18° 10 mm 5
17 Sept. Light rain shower
Light rain shower
 23° /16° 6.5 mm 5
18 Sept. Sunny
Sunny
 20° /13° 0 mm 6
19 Sept. Sunny
Sunny
 20° /12° 0 mm 5
20 Sept. Sunny
Sunny
 20° /12° 0 mm 5
21 Sept. Sunny
Sunny
 21° /12° 0 mm 6
22 Sept. Sunny
Sunny
 17° /11° 0 mm 5
23 Sept. Sunny
Sunny
 18° /8° 0 mm 5
24 Sept. Sunny
Sunny
 19° /8° 0 mm 5
25 Sept. Overcast
Overcast
 22° /14° 9.4 mm 5
26 Sept. Fog
Fog
 20° /11° 0.5 mm 5
27 Sept. Fog
Fog
 20° /9° 0 mm 5
28 Sept. Light drizzle
Light drizzle
 20° /11° 0.3 mm 5
29 Sept. Mist
Mist
 21° /12° 1 mm 5
30 Sept. Mist
Mist
 21° /12° 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 11°. 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 77 mm spread over approximately 10 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 💧
Typically, Guelph has 10 rainy days in September with a total of 77 mm of rainfall.

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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