Orillia
September
Weather in Orillia for September 2025
Your guide to Orillia weather in September - trends and predictions
In general, the average temperature in Orillia at the beginning of September is 24.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.3 °C by the end of September.
Orillia sees moderate rainfall in September, averaging 9 rainy days.
- New! Chat with our AI weatherman - it’s amazing and free.
21
Dry days
9
Rainy days
0
Snow days
23°/11°
Temperatures
15 km/h
Avg max wind
71 %
Avg humidity
Orillia in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2  22° | 3  27° | 4 28° | 5  29° | 6  25° | 7  18° |
| 8 20° | 9  21° | 10  22° | 11 24° | 12  23° | 13 22° | 14 24° |
| 15 23° | 16 25° | 17 23° | 18 22° | 19 22° | 20 23° | 21 23° |
| 22 23° | 23 21° | 24 21° | 25 22° | 26 20° | 27 19° | 28 20° |
| 29 21° | 30 19° |
You can click on date
Access Orillia weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during September in Orillia
See the weather trend as well as the moving average line
September weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Overcast | 23° /10° | 0 mm | 6 | |
| 2 Sept. | Patchy rain possible | 22° /11° | 0.3 mm | 6 | |
| 3 Sept. | Partly cloudy | 27° /13° | 0.6 mm | 7 | |
| 4 Sept. | Patchy rain possible | 28° /15° | 0.5 mm | 7 | |
| 5 Sept. | Sunny | 29° /16° | 0 mm | 8 | |
| 6 Sept. | Thundery outbreaks possible | 25° /17° | 12.7 mm | 6 | |
| 7 Sept. | Moderate or heavy rain shower | 18° /11° | 12.1 mm | 4 | |
| 8 Sept. | Overcast | 20° /8° | 0.5 mm | 5 | |
| 9 Sept. | Cloudy | 21° /9° | 4 mm | 5 | |
| 10 Sept. | Mist | 22° /12° | 0 mm | 6 | |
| 11 Sept. | Light rain shower | 24° /13° | 1.4 mm | 6 | |
| 12 Sept. | Heavy rain | 23° /14° | 13.5 mm | 6 | |
| 13 Sept. | Overcast | 22° /12° | 0 mm | 6 | |
| 14 Sept. | Overcast | 24° /11° | 0 mm | 6 | |
| 15 Sept. | Mist | 23° /11° | 0 mm | 6 | |
| 16 Sept. | Mist | 25° /12° | 0 mm | 6 | |
| 17 Sept. | Light rain shower | 23° /11° | 1.7 mm | 6 | |
| 18 Sept. | Mist | 22° /10° | 0 mm | 5 | |
| 19 Sept. | Sunny | 22° /10° | 0 mm | 5 | |
| 20 Sept. | Fog | 23° /9° | 0 mm | 6 | |
| 21 Sept. | Cloudy | 23° /14° | 6.4 mm | 5 | |
| 22 Sept. | Mist | 23° /13° | 0 mm | 5 | |
| 23 Sept. | Fog | 21° /12° | 34.5 mm | 5 | |
| 24 Sept. | Overcast | 21° /13° | 0 mm | 5 | |
| 25 Sept. | Overcast | 22° /13° | 15.4 mm | 5 | |
| 26 Sept. | Overcast | 20° /12° | 1.2 mm | 5 | |
| 27 Sept. | Overcast | 19° /9° | 0 mm | 5 | |
| 28 Sept. | Overcast | 20° /10° | 0 mm | 5 | |
| 29 Sept. | Overcast | 21° /13° | 0 mm | 5 | |
| 30 Sept. | Mist | 19° /12° | 0 mm | 4 | |
| 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.
Orillia in September - FAQ
What are the expected maximum and minimum temperatures in Orillia 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 Orillia during September?
Moderate rainfall is anticipated in Orillia during September, with a total of 61.8 mm spread over approximately 9 days. Considering plans for rainy days is advisable.
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 💧
UV exposure in Orillia during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
You are here
Where is Orillia?Get accurate weather forecasts for Orillia, located at latitude 44.609 and longitude -79.421. Stay updated with localized weather information tailored for Orillia.
Found a mistake?
We appreciate your attention to details. Tell us here.