Alliston
August
Weather in Alliston for August 2025
Your guide to Alliston weather in August - trends and predictions
In general, the average temperature in Alliston at the beginning of August is 25.3 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 24 °C by the end of August.
Expect significant rainfall in Alliston during August, with an average of 17 rainy days.
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14
Dry days
17
Rainy days
0
Snow days
23°/13°
Temperatures
18 km/h
Avg max wind
75 %
Avg humidity
Alliston in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2  28° | 3  27° | ||||
| 4 25° | 5  23° | 6  25° | 7 23° | 8 23° | 9  25° | 10 20° |
| 11 20° | 12 23° | 13 23° | 14 25° | 15 25° | 16 25° | 17 25° |
| 18 20° | 19 21° | 20 23° | 21 21° | 22 23° | 23 24° | 24 26° |
| 25  25° | 26 25° | 27 27° | 28 22° | 29 24° | 30  22° | 31 23° |
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Temperatures trend during August in Alliston
See the weather trend as well as the moving average line
August weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. | Cloudy | 26° /15° | 0.3 mm | 6 | |
| 2 Aug. | Patchy rain possible | 28° /16° | 2.4 mm | 7 | |
| 3 Aug. | Moderate or heavy rain shower | 27° /17° | 4.4 mm | 7 | |
| 4 Aug. | Moderate or heavy rain shower | 25° /16° | 2.5 mm | 6 | |
| 5 Aug. | Partly cloudy | 23° /15° | 2 mm | 6 | |
| 6 Aug. | Overcast | 25° /14° | 1.6 mm | 6 | |
| 7 Aug. | Moderate or heavy rain shower | 23° /13° | 15.1 mm | 6 | |
| 8 Aug. | Moderate or heavy rain shower | 23° /14° | 1.7 mm | 5 | |
| 9 Aug. | Sunny | 25° /14° | 1.4 mm | 7 | |
| 10 Aug. | Moderate or heavy rain shower | 20° /14° | 9 mm | 5 | |
| 11 Aug. | Cloudy | 20° /12° | 3.9 mm | 5 | |
| 12 Aug. | Moderate or heavy rain shower | 23° /13° | 9.6 mm | 6 | |
| 13 Aug. | Patchy rain possible | 23° /13° | 0.6 mm | 5 | |
| 14 Aug. | Patchy rain possible | 25° /14° | 0.3 mm | 6 | |
| 15 Aug. | Moderate rain at times | 25° /15° | 2.1 mm | 6 | |
| 16 Aug. | Partly cloudy | 25° /15° | 1.4 mm | 7 | |
| 17 Aug. | Patchy rain possible | 25° /15° | 13.6 mm | 6 | |
| 18 Aug. | Moderate or heavy rain shower | 20° /14° | 15.9 mm | 5 | |
| 19 Aug. | Partly cloudy | 21° /12° | 0.3 mm | 5 | |
| 20 Aug. | Patchy rain possible | 23° /12° | 0.1 mm | 5 | |
| 21 Aug. | Overcast | 21° /12° | 0 mm | 5 | |
| 22 Aug. | Overcast | 23° /11° | 0 mm | 6 | |
| 23 Aug. | Moderate or heavy rain shower | 24° /13° | 4.6 mm | 6 | |
| 24 Aug. | Patchy rain possible | 26° /15° | 1.1 mm | 6 | |
| 25 Aug. | Fog | 25° /15° | 0 mm | 6 | |
| 26 Aug. | Fog | 25° /13° | 0 mm | 6 | |
| 27 Aug. | Cloudy | 27° /13° | 0 mm | 6 | |
| 28 Aug. | Cloudy | 22° /12° | 0.3 mm | 5 | |
| 29 Aug. | Cloudy | 24° /11° | 1.2 mm | 6 | |
| 30 Aug. | Light rain | 22° /12° | 6.5 mm | 6 | |
| 31 Aug. | Sunny | 23° /12° | 5.8 mm | 6 | |
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Important Notice
Our weather forecast for Alliston in August 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 Alliston forecast closer to your planned date for the most up-to-date weather information.
Alliston in August - FAQ
What are the expected maximum and minimum temperatures in Alliston during August?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Alliston during August?
Significant rainfall exceeding 132.7 mm is expected in Alliston during August, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Alliston during August?
The average wind speed in Alliston during August is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
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