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Canada weather

Weather in Alliston for September 2027

Your guide to Alliston weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Alliston at the beginning of September is 23.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.3 °C by the end of September.

    • Rain 🌧️

  • Alliston experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 123.9 mm.

    • More

  • Is September a good time to visit Alliston? check out the best time to travel to Alliston page.

  • ✨ Is September a good time to visit Alliston? – Ask the AI Weatherman

Average dry days
24
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/12°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
74 %
Avg humidity

Alliston Weather September

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

Temperatures trend during September in Alliston

See the weather trend as well as the moving average line

September weather in Alliston day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 25° /13° 0 mm 6
2 Sept. Heavy rain
Heavy rain
 23° /12° 37.7 mm 4
3 Sept. Sunny
Sunny
 26° /14° 0.5 mm 6
4 Sept. Moderate rain
Moderate rain
 24° /14° 18.7 mm 6
5 Sept. Sunny
Sunny
 26° /13° 0.9 mm 7
6 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 22° /14° 6.2 mm 5
7 Sept. Light rain
Light rain
 18° /11° 7.5 mm 4
8 Sept. Overcast
Overcast
 20° /9° 0.2 mm 4
9 Sept. Light rain
Light rain
 22° /11° 4.6 mm 4
10 Sept. Overcast
Overcast
 22° /12° 0 mm 6
11 Sept. Partly cloudy
Partly cloudy
 23° /11° 0.4 mm 6
12 Sept. Heavy rain
Heavy rain
 24° /13° 7.9 mm 6
13 Sept. Patchy rain possible
Patchy rain possible
 22° /14° 1.8 mm 5
14 Sept. Cloudy
Cloudy
 22° /12° 0.3 mm 5
15 Sept. Patchy rain possible
Patchy rain possible
 23° /11° 2.1 mm 5
16 Sept. Partly cloudy
Partly cloudy
 24° /12° 0 mm 5
17 Sept. Overcast
Overcast
 22° /12° 0.8 mm 5
18 Sept. Fog
Fog
 21° /10° 0 mm 4
19 Sept. Partly cloudy
Partly cloudy
 19° /9° 0 mm 5
20 Sept. Sunny
Sunny
 21° /9° 0 mm 5
21 Sept. Light rain
Light rain
 21° /11° 2.8 mm 4
22 Sept. Moderate rain
Moderate rain
 22° /11° 12 mm 5
23 Sept. Moderate rain
Moderate rain
 20° /12° 10.6 mm 5
24 Sept. Light rain
Light rain
 20° /13° 3.7 mm 4
25 Sept. Light rain
Light rain
 21° /12° 4.9 mm 5
26 Sept. Overcast
Overcast
 20° /11° 0 mm 4
27 Sept. Overcast
Overcast
 20° /12° 0 mm 5
28 Sept. Overcast
Overcast
 19° /11° 0 mm 4
29 Sept. Mist
Mist
 22° /13° 0 mm 4
30 Sept. Mist
Mist
 21° /12° 0.2 mm 4
Next
Important Notice
Our weather forecast for Alliston 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 Alliston forecast closer to your planned date for the most up-to-date weather information.
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Alliston in September - FAQ

What are the expected maximum and minimum temperatures in Alliston 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 Alliston during September?
Significant rainfall exceeding 123.9 mm is expected in Alliston during September, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Alliston during September?
The average wind speed in Alliston during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Alliston

Explore the daily rainfall trends and prepare for Allistons September weather 💧
Typically, Alliston has 6 rainy days in September with a total of 123.9 mm of rainfall.

UV exposure in Alliston during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Alliston?

Get accurate weather forecasts for Alliston, located at latitude 44.15 and longitude -79.866. Stay updated with localized weather information tailored for Alliston.

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