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Canada weather

Weather in Oshawa for August 2025

Your guide to Oshawa weather in August - trends and predictions

  • In general, the average temperature in Oshawa at the beginning of August is 24.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 23.3 °C by the end of August.

  • Expect significant rainfall in Oshawa during August, with an average of 18 rainy days.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
13
Dry days
Average rainy days
18
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/15°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
74 %
Avg humidity

Oshawa in August average weather

Move between months or click on a day
July
September
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Cloudy
25°
2
Overcast
26°
3
Patchy rain possible
25°
4
Moderate rain at times
26°
5
Cloudy
25°
6
Overcast
23°
7
Heavy rain at times
24°
8
Moderate rain at times
23°
9
Overcast
24°
10
Moderate or heavy rain shower
22°
11
Partly cloudy
22°
12
Moderate or heavy rain shower
24°
13
Patchy rain possible
24°
14
Patchy rain possible
25°
15
Moderate rain at times
24°
16
Patchy rain possible
25°
17
Patchy rain possible
25°
18
Heavy rain at times
20°
19
Partly cloudy
23°
20
Heavy rain at times
22°
21
Overcast
23°
22
Cloudy
23°
23
Heavy rain at times
23°
24
Patchy rain possible
23°
25
Mist
25°
26
Overcast
25°
27
Cloudy
24°
28
Partly cloudy
22°
29
Partly cloudy
22°
30
Light rain shower
23°
31
Partly cloudy
22°
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Temperatures trend during August in Oshawa

See the weather trend as well as the moving average line

August weather day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
1 Aug. Cloudy
Cloudy
 25° /17° 0.4 mm 6
2 Aug. Overcast
Overcast
 26° /18° 0.2 mm 6
3 Aug. Patchy rain possible
Patchy rain possible
 25° /19° 6.9 mm 6
4 Aug. Moderate rain at times
Moderate rain at times
 26° /18° 6.4 mm 6
5 Aug. Cloudy
Cloudy
 25° /17° 1.4 mm 6
6 Aug. Overcast
Overcast
 23° /15° 0.4 mm 6
7 Aug. Heavy rain at times
Heavy rain at times
 24° /16° 6.2 mm 5
8 Aug. Moderate rain at times
Moderate rain at times
 23° /17° 1 mm 5
9 Aug. Overcast
Overcast
 24° /17° 7.1 mm 6
10 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
 22° /16° 5.6 mm 5
11 Aug. Partly cloudy
Partly cloudy
 22° /15° 1.4 mm 6
12 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
 24° /16° 5.8 mm 6
13 Aug. Patchy rain possible
Patchy rain possible
 24° /16° 0.4 mm 5
14 Aug. Patchy rain possible
Patchy rain possible
 25° /16° 0.3 mm 6
15 Aug. Moderate rain at times
Moderate rain at times
 24° /17° 3 mm 6
16 Aug. Patchy rain possible
Patchy rain possible
 25° /18° 0.1 mm 6
17 Aug. Patchy rain possible
Patchy rain possible
 25° /18° 3.5 mm 6
18 Aug. Heavy rain at times
Heavy rain at times
 20° /16° 6.9 mm 5
19 Aug. Partly cloudy
Partly cloudy
 23° /13° 3.6 mm 6
20 Aug. Heavy rain at times
Heavy rain at times
 22° /13° 0.6 mm 5
21 Aug. Overcast
Overcast
 23° /14° 0 mm 5
22 Aug. Cloudy
Cloudy
 23° /13° 0 mm 6
23 Aug. Heavy rain at times
Heavy rain at times
 23° /15° 2.7 mm 6
24 Aug. Patchy rain possible
Patchy rain possible
 23° /17° 1.9 mm 6
25 Aug. Mist
Mist
 25° /17° 0.6 mm 6
26 Aug. Overcast
Overcast
 25° /15° 0 mm 6
27 Aug. Cloudy
Cloudy
 24° /15° 0 mm 6
28 Aug. Partly cloudy
Partly cloudy
 22° /14° 0.4 mm 6
29 Aug. Partly cloudy
Partly cloudy
 22° /13° 0.2 mm 6
30 Aug. Light rain shower
Light rain shower
 23° /13° 1.6 mm 5
31 Aug. Partly cloudy
Partly cloudy
 22° /13° 3.9 mm 6
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Important Notice
Our weather forecast for Oshawa 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 Oshawa forecast closer to your planned date for the most up-to-date weather information.

Oshawa in August - FAQ

What are the expected maximum and minimum temperatures in Oshawa during August?
During August, expect a variety of temperatures with highs around 23° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Oshawa during August?
Moderate rainfall is anticipated in Oshawa during August, with a total of 91.1 mm spread over approximately 18 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Oshawa during August?
The average wind speed in Oshawa during August is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

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Location coordinates Where is Oshawa?

Get accurate weather forecasts for Oshawa, located at latitude 43.9 and longitude -78.85. Stay updated with localized weather information tailored for Oshawa.

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