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Canada weather

Weather in Orillia for September 2026

Your guide to Orillia weather in September - trends and predictions

    Temperatures

  • So far, September 2026 in Orillia is slightly warmer than the historical average by 0.6 °C.

  • The forecast for the next days in Orillia predicts a temperature of 17.7 °C, which is cooler than the historical average.

  • In general, the average temperature in Orillia at the beginning of September is 23.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.6 °C by the end of September.

    • Rain 🌧️

  • The climate of Orillia in September is notably wet, with an average of 12 rainy days, and a total of 127.3 mm of precipitation.

    • More

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Average dry days
18
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/12°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
74 %
Avg humidity

Orillia Weather September

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

Temperatures trend during September in Orillia

See the weather trend as well as the moving average line

September weather in Orillia day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Overcast
Overcast
 24° /11° 0 mm 5
2 Sept. Patchy rain possible
Patchy rain possible
 24° /13° 42.5 mm 5
3 Sept. Sunny
Sunny
 26° /14° 0.3 mm 7
4 Sept. Sunny
Sunny
 24° /14° 20.9 mm 6
5 Sept. Sunny
Sunny
 25° /13° 1.1 mm 7
6 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 22° /14° 6.3 mm 5
7 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 19° /11° 8.5 mm 4
8 Sept. Overcast
Overcast
 21° /10° 0.3 mm 4
9 Sept. Cloudy
Cloudy
 23° /11° 3.5 mm 4
10 Sept. Mist
Mist
 22° /12° 0 mm 6
11 Sept. Light rain shower
Light rain shower
 23° /11° 0.7 mm 6
12 Sept. Overcast
Overcast
 24° /14° 0.2 mm 5.4
13 Sept. Patchy rain possible
Patchy rain possible
 20° /14° 0.4 mm 5.1
14 Sept. Sunny
Sunny
 16° /8° 0 mm 5.4
15 Sept. Overcast
Overcast
 19° /12° 2.1 mm 4
16 Sept. Overcast
Overcast
 22° /15° 0.4 mm 5
17 Sept. Patchy rain possible
Patchy rain possible
 16° /11° 0.8 mm 3
18 Sept. Light rain shower
Light rain shower
 19° /11° 8.9 mm 4
19 Sept. Light rain shower
Light rain shower
 14° /9° 53.7 mm 3
20 Sept. Sunny
Sunny
 16° /8° 0 mm 5
21 Sept. Sunny
Sunny
 17° /10° 0 mm 5
22 Sept. Sunny
Sunny
 18° /13° 0 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 19° /13° 0.1 mm 5
24 Sept. Patchy rain possible
Patchy rain possible
 12° /7° 1.4 mm 3
25 Sept. Overcast
Overcast
 16° /7° 0.1 mm 4
26 Sept. Overcast
Overcast
 20° /12° 0.8 mm 5
27 Sept. Overcast
Overcast
 20° /11° 1.2 mm 5
28 Sept. Overcast
Overcast
 20° /10° 0 mm 5
29 Sept. Overcast
Overcast
 22° /10° 0 mm 5
30 Sept. Mist
Mist
 20° /11° 0 mm 5
Next
Important Notice
Our weather forecast for Orillia 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 Orillia forecast closer to your planned date for the most up-to-date weather information.
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Orillia in September - FAQ

What are the expected maximum and minimum temperatures in Orillia 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 Orillia during September?
Significant rainfall exceeding 127.3 mm is expected in Orillia during September, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Orillia during September?
The average wind speed in Orillia during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Orillia

Explore the daily rainfall trends and prepare for Orillias September weather 💧
Typically, Orillia has 12 rainy days in September with a total of 127.3 mm of rainfall.

UV exposure in Orillia during September

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

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Get accurate weather forecasts for Orillia, located at latitude 44.609 and longitude -79.421. Stay updated with localized weather information tailored for Orillia.

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