Orillia in September
7.4out of 10
Possible, with caveats
Mild: highs around 21°C. Frequent rain: about 11 rainy days.
21°CAvg high
12°CAvg low
11Rainy days (84 mm)
12:17 hDaylight
07:03Sunrise · 19:21 Sunset
Why this score
- Mild: highs around 21°C
- Frequent rain: about 11 rainy days
What to wear and pack
- Layers you can add or remove
- A light jacket for cooler evenings
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±3.2 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -3°C | -11°C | 65 mm | 12 | – | – | 3.5 |
| February | -2°C | -11°C | 50 mm | 9 | – | – | 3.9 |
| March | 3°C | -6°C | 60 mm | 10 | – | – | 4.1 |
| April | 11°C | 2°C | 79 mm | 12 | – | – | 5.7 |
| May | 19°C | 8°C | 87 mm | 12 | – | – | 7.0 |
| June | 23°C | 14°C | 95 mm | 11 | – | – | 7.6 |
| July | 25°C | 16°C | 87 mm | 12 | – | – | 7.4 |
| August | 24°C | 16°C | 88 mm | 12 | – | – | 7.5 |
| September | 21°C | 12°C | 84 mm | 11 | – | – | 7.4 |
| October | 13°C | 6°C | 87 mm | 13 | – | – | 5.8 |
| November | 6°C | 0°C | 76 mm | 12 | – | – | 4.6 |
| December | 0°C | -7°C | 65 mm | 12 | – | – | 3.4 |
Frequently asked questions
How hot is Orillia in September?
Daytime highs average 21°C and nights about 12°C.
When is the best time to visit Orillia?
The best months are June, August, July, September.