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Wellington County (Guelph)
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Weather in Wellington County for September 2025

Your guide to Wellington County weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Wellington County has been significantly cooler than historical averages by -2 °C, with average temperature of 21.1 °C.

  • The forecast for the next days in Wellington County predicts temperatures to be around 24 °C, close to the historical average.

  • In general, the average temperature in Wellington County at the beginning of September is 23.6 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 20.6 °C by the end of September.

    • Rain 🌧️

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

    • More

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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

Wellington County 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
Mist
23°
15
Partly cloudy
24°
16
Sunny
27°
17
Partly cloudy
26°
18
Fog
26°
19
Sunny
22°
20
Sunny
20°
21
Patchy rain possible
29°
22
Sunny
32°
23
Patchy rain possible
29°
24
Patchy rain possible
25°
25
Patchy rain possible
23°
26
Patchy rain possible
17°
27
Patchy rain possible
20°
28
Patchy rain possible
18°
29
Sunny
21°
30
Mist
20°

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
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. Mist
Mist
 23° /9° 0 mm 5
15 Sept. Partly cloudy
Partly cloudy
 24° /11° 0 mm 6
16 Sept. Sunny
Sunny
 27° /10° 0 mm 1.3
17 Sept. Partly cloudy
Partly cloudy
 26° /12° 0 mm 1.3
18 Sept. Fog
Fog
 26° /11° 0 mm 1.2
19 Sept. Sunny
Sunny
 22° /11° 0 mm 1.4
20 Sept. Sunny
Sunny
 20° /7° 0 mm 0
21 Sept. Patchy rain possible
Patchy rain possible
 29° /12° 0.1 mm 4
22 Sept. Sunny
Sunny
 32° /19° 0 mm 6
23 Sept. Patchy rain possible
Patchy rain possible
 29° /15° 1.8 mm 5
24 Sept. Patchy rain possible
Patchy rain possible
 25° /17° 2.4 mm 5
25 Sept. Patchy rain possible
Patchy rain possible
 23° /12° 1.3 mm 4
26 Sept. Patchy rain possible
Patchy rain possible
 17° /11° 0.7 mm 3
27 Sept. Patchy rain possible
Patchy rain possible
 20° /11° 0.1 mm 3
28 Sept. Patchy rain possible
Patchy rain possible
 18° /11° 0 mm 3
29 Sept. Sunny
Sunny
 21° /11° 0 mm 4
30 Sept. Mist
Mist
 20° /13° 0 mm 5
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.
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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 12°. 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 56.2 mm spread over approximately 9 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 💧

UV exposure in Wellington County during September

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

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