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 sees moderate rainfall in September, averaging 7 rainy days.
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23
Dry days
7
Rainy days
0
Snow days
23°/11°
Temperatures
17 km/h
Avg max wind
73 %
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 23° 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?
In September, Guelph can expect light to moderate rainfall, totaling 33.6 mm across approximately 7 days. Occasional showers are possible, and planning ahead for them could be helpful.
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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