Guelph
September
Weather in Guelph for September 2025
Your guide to Guelph weather in September - trends and predictions
In general, the average temperature in Guelph at the beginning of September is 25.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20 °C by the end of September.
Guelph experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 56.2 mm.
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Temperatures
Rain 🌧️
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21
Dry days
9
Rainy days
0
Snow days
22°/12°
Temperatures
17 km/h
Avg max wind
74 %
Avg humidity
Guelph in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2  21° | 3  27° | 4  28° | 5 30° | 6 28° | 7  19° |
| 8 20° | 9 22° | 10 23° | 11  24° | 12 24° | 13 21° | 14 22° |
| 15  25° | 16 25° | 17 22° | 18 23° | 19 21° | 20 23° | 21 24° |
| 22 22° | 23 22° | 24 20° | 25 22° | 26 21° | 27 19° | 28  18° |
| 29 20° | 30 20° |
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Temperatures trend during September in Guelph
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. | Sunny | 23° /10° | 0.2 mm | 6 | |
| 2 Sept. | Fog | 21° /9° | 0.2 mm | 6 | |
| 3 Sept. | Thundery outbreaks possible | 27° /12° | 0 mm | 7 | |
| 4 Sept. | Overcast | 28° /14° | 0 mm | 7 | |
| 5 Sept. | Overcast | 30° /14° | 0 mm | 7 | |
| 6 Sept. | Thundery outbreaks possible | 28° /16° | 5.9 mm | 6 | |
| 7 Sept. | Moderate or heavy rain shower | 19° /11° | 6.4 mm | 5 | |
| 8 Sept. | Mist | 20° /10° | 0.1 mm | 5 | |
| 9 Sept. | Overcast | 22° /9° | 0.2 mm | 5 | |
| 10 Sept. | Overcast | 23° /12° | 0 mm | 5 | |
| 11 Sept. | Light rain shower | 24° /12° | 1.4 mm | 6 | |
| 12 Sept. | Moderate or heavy rain shower | 24° /13° | 6.1 mm | 6 | |
| 13 Sept. | Overcast | 21° /11° | 0 mm | 6 | |
| 14 Sept. | Mist | 22° /8° | 0 mm | 6 | |
| 15 Sept. | Partly cloudy | 25° /11° | 0 mm | 7 | |
| 16 Sept. | Mist | 25° /11° | 0 mm | 6 | |
| 17 Sept. | Light rain shower | 22° /12° | 1.9 mm | 5 | |
| 18 Sept. | Fog | 23° /10° | 0 mm | 6 | |
| 19 Sept. | Overcast | 21° /10° | 0 mm | 5 | |
| 20 Sept. | Mist | 23° /8° | 0 mm | 5 | |
| 21 Sept. | Mist | 24° /13° | 0 mm | 5 | |
| 22 Sept. | Mist | 22° /12° | 0 mm | 5 | |
| 23 Sept. | Mist | 22° /12° | 18.4 mm | 5 | |
| 24 Sept. | Partly cloudy | 20° /12° | 7.3 mm | 5 | |
| 25 Sept. | Overcast | 22° /13° | 5.4 mm | 5 | |
| 26 Sept. | Fog | 21° /11° | 0.7 mm | 5 | |
| 27 Sept. | Overcast | 19° /7° | 0 mm | 5 | |
| 28 Sept. | Light drizzle | 18° /11° | 0.5 mm | 5 | |
| 29 Sept. | Mist | 20° /13° | 1.6 mm | 5 | |
| 30 Sept. | Mist | 20° /13° | 0 mm | 5 | |
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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.
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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