Wellington County (Guelph)
September
Weather in Wellington County for September 2026
Your guide to Wellington County weather in September - trends and predictions
Until now, September 2026 in Wellington County is slightly cooler than the historical average by 1 °C.
The forecast for the next days in Wellington County predicts a temperature of 15.9 °C, which is cooler than the historical average.
In general, the average temperature in Wellington County at the beginning of September is 24.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.9 °C by the end of September.
Wellington County experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 77 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
20
Dry days
10
Rainy days
0
Snow days
22°/11°
Temperatures
17 km/h
Avg max wind
75 %
Avg humidity
Wellington County Weather September
Move between months or click on a day
Temperatures trend during September in Wellington County
See the weather trend as well as the moving average line
September weather in Wellington County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 26° /12° | 0.1 mm | 7 | |
| 2 Sept. |  Fog | 24° /12° | 23 mm | 4 | |
| 3 Sept. |  Thundery outbreaks possible | 27° /13° | 0.2 mm | 5 | |
| 4 Sept. |  Overcast | 25° /13° | 8.4 mm | 6 | |
| 5 Sept. | Overcast | 26° /12° | 0 mm | 6 | |
| 6 Sept. | Thundery outbreaks possible | 24° /13° | 2.9 mm | 6 | |
| 7 Sept. | Overcast | 19° /10° | 3.2 mm | 4 | |
| 8 Sept. | Mist | 21° /9° | 0.1 mm | 4 | |
| 9 Sept. | Overcast | 23° /10° | 3.3 mm | 4 | |
| 10 Sept. | Overcast | 23° /12° | 0.3 mm | 5 | |
| 11 Sept. |  Partly cloudy | 24° /11° | 0.7 mm | 6 | |
| 12 Sept. |  Moderate or heavy rain shower | 25° /11° | 3.1 mm | 6 | |
| 13 Sept. | Overcast | 23° /12° | 0.1 mm | 5 | |
| 14 Sept. | Sunny | 22° /9° | 0 mm | 6 | |
| 15 Sept. | Partly cloudy | 24° /11° | 0.3 mm | 5 | |
| 16 Sept. | Mist | 24° /12° | 0 mm | 5 | |
| 17 Sept. |  Light rain shower | 22° /13° | 1 mm | 4 | |
| 18 Sept. | Fog | 23° /10° | 0 mm | 6 | |
| 19 Sept. | Overcast | 20° /10° | 0 mm | 4 | |
| 20 Sept. | Mist | 21° /8° | 0 mm | 4 | |
| 21 Sept. | Overcast | 21° /11° | 0.7 mm | 4 | |
| 22 Sept. | Mist | 21° /11° | 12.2 mm | 5 | |
| 23 Sept. | Mist | 21° /12° | 11.9 mm | 5 | |
| 24 Sept. | Partly cloudy | 19° /12° | 5 mm | 5 | |
| 25 Sept. | Overcast | 21° /12° | 7.1 mm | 5 | |
| 26 Sept. | Overcast | 20° /11° | 0.3 mm | 4 | |
| 27 Sept. | Overcast | 21° /11° | 0 mm | 4.9 | |
| 28 Sept. | Overcast | 20° /12° | 0 mm | 3.3 | |
| 29 Sept. | Overcast | 22° /15° | 0 mm | 3.5 | |
| 30 Sept. | Overcast | 16° /13° | 6.9 mm | 2.3 | |
| Next | |||||
Important Notice
Our weather forecast for Wellington County 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 Wellington County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Wellington County in September - FAQ
What are the expected maximum and minimum temperatures in Wellington County 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 Wellington County during September?
Moderate rainfall is anticipated in Wellington County 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 Wellington County during September?
The average wind speed in Wellington County during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Wellington County
Explore the daily rainfall trends and prepare for Wellington Countys September weather 💧
Typically, Wellington County has 10 rainy days in September with a total of 77 mm of rainfall.
UV exposure in Wellington County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Wellington County
Select a location for an accurate weather forecast
More Locations Quick links
More Wellington County weather pages
You are here
Where is Wellington County?Get accurate weather forecasts for Wellington County, located at latitude 43.546 and longitude -80.256. Stay updated with localized weather information tailored for Wellington County.
Found a mistake?
We appreciate your attention to details. Tell us here.