St. Catharines
August
Weather in St. Catharines for August 2025
Your guide to St. Catharines weather in August - trends and predictions
In general, the average temperature in St. Catharines at the beginning of August is 25.1 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 23.4 °C by the end of August.
The climate of St. Catharines in August is notably wet, with an average of 14 rainy days.
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17
Dry days
14
Rainy days
0
Snow days
24°/16°
Temperatures
20 km/h
Avg max wind
75 %
Avg humidity
St. Catharines in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2  25° | 3  26° | ||||
| 4  26° | 5 25° | 6 24° | 7 24° | 8 24° | 9 25° | 10 22° |
| 11 23° | 12 24° | 13 24° | 14 24° | 15 23° | 16  26° | 17 27° |
| 18 21° | 19 23° | 20 23° | 21 23° | 22 23° | 23  23° | 24 25° |
| 25 25° | 26 24° | 27 25° | 28  22° | 29 22° | 30 23° | 31  23° |
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Temperatures trend during August in St. Catharines
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. | Partly cloudy | 26° /19° | 3.1 mm | 6 | |
| 2 Aug. | Overcast | 25° /19° | 7 mm | 6 | |
| 3 Aug. | Moderate or heavy rain shower | 26° /20° | 2.8 mm | 6 | |
| 4 Aug. | Patchy rain possible | 26° /20° | 0.3 mm | 6 | |
| 5 Aug. | Partly cloudy | 25° /19° | 0.6 mm | 6 | |
| 6 Aug. | Moderate or heavy rain shower | 24° /16° | 4.4 mm | 6 | |
| 7 Aug. | Patchy rain possible | 24° /17° | 2.7 mm | 6 | |
| 8 Aug. | Moderate or heavy rain shower | 24° /17° | 10.9 mm | 5 | |
| 9 Aug. | Patchy rain possible | 25° /18° | 7.4 mm | 6 | |
| 10 Aug. | Moderate or heavy rain shower | 22° /18° | 8.8 mm | 5 | |
| 11 Aug. | Partly cloudy | 23° /15° | 0.7 mm | 6 | |
| 12 Aug. | Moderate or heavy rain shower | 24° /17° | 5.6 mm | 6 | |
| 13 Aug. | Overcast | 24° /17° | 0 mm | 6 | |
| 14 Aug. | Overcast | 24° /17° | 0 mm | 6 | |
| 15 Aug. | Moderate or heavy rain shower | 23° /18° | 7.7 mm | 6 | |
| 16 Aug. | Cloudy | 26° /18° | 0.6 mm | 6 | |
| 17 Aug. | Patchy rain possible | 27° /19° | 4 mm | 6 | |
| 18 Aug. | Patchy rain possible | 21° /17° | 7.5 mm | 5 | |
| 19 Aug. | Partly cloudy | 23° /14° | 3.1 mm | 6 | |
| 20 Aug. | Cloudy | 23° /15° | 0 mm | 5 | |
| 21 Aug. | Overcast | 23° /17° | 0 mm | 6 | |
| 22 Aug. | Cloudy | 23° /15° | 0 mm | 6 | |
| 23 Aug. | Heavy rain at times | 23° /15° | 4.4 mm | 6 | |
| 24 Aug. | Patchy rain possible | 25° /17° | 2.2 mm | 6 | |
| 25 Aug. | Overcast | 25° /17° | 1.2 mm | 6 | |
| 26 Aug. | Overcast | 24° /17° | 0 mm | 6 | |
| 27 Aug. | Partly cloudy | 25° /17° | 0 mm | 7 | |
| 28 Aug. | Mist | 22° /13° | 2.7 mm | 5 | |
| 29 Aug. | Fog | 22° /16° | 0 mm | 6 | |
| 30 Aug. | Patchy rain possible | 23° /15° | 2.6 mm | 5 | |
| 31 Aug. | Sunny | 23° /16° | 3.1 mm | 6 | |
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Important Notice
Our weather forecast for St. Catharines 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 St. Catharines forecast closer to your planned date for the most up-to-date weather information.
St. Catharines in August - FAQ
What are the expected maximum and minimum temperatures in St. Catharines during August?
During August, expect a variety of temperatures with highs around 24° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in St. Catharines during August?
Significant rainfall exceeding 108 mm is expected in St. Catharines during August, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in St. Catharines during August?
The average wind speed in St. Catharines during August is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in St. Catharines
Explore the daily rainfall trends and prepare for St. Cathariness August weather 💧
UV exposure in St. Catharines during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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Where is St. Catharines?Get accurate weather forecasts for St. Catharines, located at latitude 43.171 and longitude -79.243. Stay updated with localized weather information tailored for St. Catharines.
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