Saint John
August
Weather in Saint John for August 2025
Your guide to Saint John weather in August - trends and predictions
In general, the average temperature in Saint John at the beginning of August is 21 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 19.9 °C by the end of August.
Expect significant rainfall in Saint John during August, with an average of 19 rainy days.
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12
Dry days
19
Rainy days
0
Snow days
20°/13°
Temperatures
17 km/h
Avg max wind
85 %
Avg humidity
Saint John in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  21° | 2  24° | 3 19° | ||||
| 4  20° | 5 20° | 6 22° | 7 21° | 8 20° | 9  19° | 10  20° |
| 11 21° | 12 21° | 13 21° | 14 22° | 15 20° | 16  22° | 17 21° |
| 18 20° | 19 21° | 20 18° | 21 19° | 22 21° | 23 21° | 24 22° |
| 25  20° | 26 19° | 27 20° | 28  21° | 29 21° | 30 19° | 31 19° |
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Temperatures trend during August in Saint John
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. | Patchy rain possible | 21° /13° | 1.7 mm | 5 | |
| 2 Aug. | Cloudy | 24° /14° | 0.1 mm | 6 | |
| 3 Aug. | Cloudy | 19° /13° | 0.3 mm | 5 | |
| 4 Aug. | Moderate or heavy rain shower | 20° /14° | 4.5 mm | 5 | |
| 5 Aug. | Moderate or heavy rain shower | 20° /14° | 17.4 mm | 5 | |
| 6 Aug. | Patchy rain possible | 22° /13° | 0.4 mm | 5 | |
| 7 Aug. | Patchy rain possible | 21° /13° | 0.4 mm | 6 | |
| 8 Aug. | Patchy rain possible | 20° /12° | 3 mm | 5 | |
| 9 Aug. | Heavy rain at times | 19° /13° | 16.7 mm | 4 | |
| 10 Aug. | Partly cloudy | 20° /15° | 8.3 mm | 5 | |
| 11 Aug. | Moderate or heavy rain shower | 21° /13° | 25.8 mm | 5 | |
| 12 Aug. | Partly cloudy | 21° /13° | 0 mm | 6 | |
| 13 Aug. | Moderate or heavy rain shower | 21° /12° | 17 mm | 6 | |
| 14 Aug. | Patchy rain possible | 22° /13° | 0.7 mm | 5 | |
| 15 Aug. | Moderate or heavy rain shower | 20° /14° | 4.2 mm | 5 | |
| 16 Aug. | Overcast | 22° /13° | 0 mm | 6 | |
| 17 Aug. | Overcast | 21° /12° | 0 mm | 6 | |
| 18 Aug. | Moderate or heavy rain shower | 20° /13° | 16.4 mm | 5 | |
| 19 Aug. | Patchy rain possible | 21° /14° | 1.8 mm | 5 | |
| 20 Aug. | Patchy rain possible | 18° /14° | 5.8 mm | 4 | |
| 21 Aug. | Patchy rain possible | 19° /13° | 1.4 mm | 5 | |
| 22 Aug. | Cloudy | 21° /12° | 0.6 mm | 5 | |
| 23 Aug. | Cloudy | 21° /10° | 0.1 mm | 5 | |
| 24 Aug. | Partly cloudy | 22° /12° | 0 mm | 6 | |
| 25 Aug. | Mist | 20° /11° | 2.4 mm | 5 | |
| 26 Aug. | Light rain shower | 19° /13° | 60.7 mm | 5 | |
| 27 Aug. | Fog | 20° /12° | 0.4 mm | 5 | |
| 28 Aug. | Sunny | 21° /11° | 0.4 mm | 6 | |
| 29 Aug. | Mist | 21° /8° | 4.6 mm | 6 | |
| 30 Aug. | Moderate or heavy rain shower | 19° /11° | 32.5 mm | 5 | |
| 31 Aug. | Overcast | 19° /9° | 0.1 mm | 5 | |
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Important Notice
Our weather forecast for Saint John 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 Saint John forecast closer to your planned date for the most up-to-date weather information.
Saint John in August - FAQ
What are the expected maximum and minimum temperatures in Saint John during August?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Saint John during August?
Significant rainfall exceeding 403.9 mm is expected in Saint John during August, occurring over more than 19 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Saint John during August?
The average wind speed in Saint John during August is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Saint John
Explore the daily rainfall trends and prepare for Saint Johns August weather 💧
UV exposure in Saint John during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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