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Weather in Ontario for August 2025

Your guide to Ontario weather in August - trends and predictions

    Temperatures

  • In general, the average temperature in Ontario at the beginning of August is 26.4 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 26 °C by the end of August.

  • Rain 🌧️

  • Ontario in August brings notable rainfall, with an average of 20 rainy days and a total precipitation of 57.2 mm.

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Average dry days
11
Dry days
Average rainy days
20
Rainy days
Average snowy days
0
Snow days
Average temperatures
25°/18°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
66 %
Avg humidity

Ontario in August average weather

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Temperatures trend during August in Ontario

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. Moderate rain at times
Moderate rain at times
25° /17° 1.3 mm 6
2 Aug. Sunny
Sunny
26° /17° 0.1 mm 6
3 Aug. Partly cloudy
Partly cloudy
27° /17° 1.7 mm 6
4 Aug. Sunny
Sunny
27° /18° 0.9 mm 7
5 Aug. Cloudy
Cloudy
26° /17° 0.8 mm 6
6 Aug. Patchy rain possible
Patchy rain possible
27° /18° 0.7 mm 6
7 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
27° /19° 4.6 mm 6
8 Aug. Overcast
Overcast
25° /19° 2.2 mm 6
9 Aug. Partly cloudy
Partly cloudy
26° /18° 2.7 mm 6
10 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
24° /18° 5.6 mm 6
11 Aug. Patchy rain possible
Patchy rain possible
25° /17° 0.7 mm 6
12 Aug. Moderate rain at times
Moderate rain at times
27° /17° 2.7 mm 6
13 Aug. Patchy rain possible
Patchy rain possible
26° /16° 0.1 mm 6
14 Aug. Sunny
Sunny
25° /16° 0 mm 6
15 Aug. Sunny
Sunny
25° /17° 2.5 mm 6
16 Aug. Patchy rain possible
Patchy rain possible
25° /17° 0.5 mm 6
17 Aug. Patchy rain possible
Patchy rain possible
25° /18° 5.3 mm 6
18 Aug. Patchy rain possible
Patchy rain possible
24° /17° 4 mm 6
19 Aug. Cloudy
Cloudy
25° /16° 0.7 mm 6
20 Aug. Partly cloudy
Partly cloudy
26° /17° 0.7 mm 6
21 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
24° /17° 4.4 mm 6
22 Aug. Partly cloudy
Partly cloudy
25° /17° 2.8 mm 6
23 Aug. Partly cloudy
Partly cloudy
26° /17° 1.7 mm 7
24 Aug. Patchy rain possible
Patchy rain possible
27° /18° 0.5 mm 7
25 Aug. Patchy rain possible
Patchy rain possible
28° /19° 0.9 mm 7
26 Aug. Moderate rain at times
Moderate rain at times
27° /18° 1.7 mm 6
27 Aug. Partly cloudy
Partly cloudy
25° /17° 0 mm 7
28 Aug. Sunny
Sunny
25° /17° 1 mm 6
29 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
26° /18° 1 mm 6
30 Aug. Partly cloudy
Partly cloudy
26° /17° 2.8 mm 6
31 Aug. Partly cloudy
Partly cloudy
25° /15° 2.5 mm 6
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Important Notice
Our weather forecast for Ontario 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 Ontario forecast closer to your planned date for the most up-to-date weather information.

Ontario in August - FAQ

What are the expected maximum and minimum temperatures in Ontario during August?
During August, expect a variety of temperatures with highs around 25° and lows near 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Ontario during August?
Moderate rainfall is anticipated in Ontario during August, with a total of 57.2 mm spread over approximately 20 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Ontario during August?
The average wind speed in Ontario during August is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in Ontario

Explore the daily rainfall trends and prepare for Ontarios August weather 💧

UV exposure in Ontario during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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Location coordinates Where is Ontario?

Get accurate weather forecasts for Ontario, located at latitude 43.706 and longitude -79.399. Stay updated with localized weather information tailored for Ontario.

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