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The temperatures in Orillia in October are quite cold with temperatures between 6°C and 13°C, warm clothes are a must.
You can expect rain for roughly half of the month of October in Orillia. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Please note that Orillia can expect a few days of snow in October.
Our weather forecast can give you a great sense of what weather to expect in Orillia in October 2025.
If you’re planning to visit Orillia in the near future, we highly recommend that you review the 14 day weather forecast for Orillia before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -5° / -12° | 6 | 3 | 24 | 105 mm | Awful | Orillia in January |
| February | -4° / -11° | 5 | 2 | 22 | 91 mm | Awful | Orillia in February |
| March | 2° / -5° | 8 | 8 | 16 | 95 mm | Awful | Orillia in March |
| April | 9° / 1° | 9 | 12 | 8 | 135 mm | Awful | Orillia in April |
| May | 17° / 7° | 8 | 22 | 1 | 122 mm | Ok | Orillia in May |
| June | 21° / 11° | 8 | 22 | 0 | 136 mm | Ok | Orillia in June |
| July | 24° / 15° | 7 | 24 | 0 | 138 mm | Good | Orillia in July |
| August | 24° / 15° | 6 | 25 | 0 | 144 mm | Perfect | Orillia in August |
| September | 20° / 11° | 6 | 24 | 0 | 107 mm | Good | Orillia in September |
| October | 13° / 6° | 9 | 21 | 2 | 138 mm | Awful | Orillia in October |
| November | 5° / 0° | 8 | 11 | 11 | 101 mm | Awful | Orillia in November |
| December | -1° / -6° | 7 | 4 | 21 | 109 mm | Awful | Orillia in December |