Ontario
October
Weather in Ontario for October 2025
Your guide to Ontario weather in October - trends and predictions
In general, the average temperature in Ontario at the beginning of October is 33.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22.6 °F by the end of October.
Precipitation in Ontario during October is a rare event, with an average of fewer than 2 rainy days.
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30
Dry days
1
Rainy days
0
Snow days
28°/14°
Temperatures
13 km/h
Avg max wind
41 %
Avg humidity
Ontario in October average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  28° | 2  31° | 3 33° | 4 35° | 5 37° | ||
| 6 37° | 7 36° | 8 35° | 9  34° | 10 30° | 11 28° | 12 28° |
| 13 25° | 14 26° | 15 29° | 16 28° | 17 24° | 18 30° | 19  31° |
| 20 34° | 21 29° | 22 27° | 23 27° | 24 25° | 25 25° | 26 25° |
| 27 25° | 28 19° | 29 19° | 30 22° | 31 23° |
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Temperatures trend during October in Ontario
See the weather trend as well as the moving average line
October weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Oct. 1 | Patchy rain possible | 28° /16° | 0.1 mm | 7 | |
| Oct. 2 | Sunny | 31° /16° | 0 mm | 8 | |
| Oct. 3 | Sunny | 33° /18° | 0 mm | 9 | |
| Oct. 4 | Sunny | 35° /18° | 0 mm | 8 | |
| Oct. 5 | Sunny | 37° /21° | 0 mm | 9 | |
| Oct. 6 | Sunny | 37° /21° | 0 mm | 9 | |
| Oct. 7 | Sunny | 36° /22° | 0 mm | 9 | |
| Oct. 8 | Sunny | 35° /20° | 0 mm | 9 | |
| Oct. 9 | Overcast | 34° /20° | 0 mm | 8 | |
| Oct. 10 | Sunny | 30° /18° | 0 mm | 8 | |
| Oct. 11 | Sunny | 28° /15° | 0 mm | 7 | |
| Oct. 12 | Sunny | 28° /16° | 0 mm | 7 | |
| Oct. 13 | Overcast | 25° /15° | 0 mm | 7 | |
| Oct. 14 | Overcast | 26° /14° | 0 mm | 6 | |
| Oct. 15 | Sunny | 29° /16° | 0 mm | 7 | |
| Oct. 16 | Sunny | 28° /15° | 0 mm | 7 | |
| Oct. 17 | Overcast | 24° /14° | 0 mm | 6 | |
| Oct. 18 | Sunny | 30° /14° | 0 mm | 8 | |
| Oct. 19 | Partly cloudy | 31° /15° | 0 mm | 8 | |
| Oct. 20 | Sunny | 34° /19° | 0 mm | 8 | |
| Oct. 21 | Sunny | 29° /15° | 0 mm | 7 | |
| Oct. 22 | Partly cloudy | 27° /15° | 0 mm | 7 | |
| Oct. 23 | Patchy rain possible | 27° /14° | 0.2 mm | 7 | |
| Oct. 24 | Partly cloudy | 25° /14° | 0 mm | 6 | |
| Oct. 25 | Partly cloudy | 25° /14° | 0 mm | 7 | |
| Oct. 26 | Patchy rain possible | 25° /14° | 0.1 mm | 6 | |
| Oct. 27 | Partly cloudy | 25° /13° | 0 mm | 6 | |
| Oct. 28 | Sunny | 19° /11° | 0 mm | 5 | |
| Oct. 29 | Sunny | 19° /9° | 0 mm | 6 | |
| Oct. 30 | Sunny | 22° /10° | 0 mm | 5 | |
| Oct. 31 | Sunny | 23° /10° | 0 mm | 7 | |
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Important Notice
Our weather forecast for Ontario in October 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 Ontario forecast closer to your planned date for the most up-to-date weather information.
Ontario in October - FAQ
What are the expected maximum and minimum temperatures in Ontario during October?
Enjoy moderate daytime temperatures of up to 28° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Ontario during October?
Rainfall in Ontario during October is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Ontario during October?
The average wind speed in Ontario during October is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
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