Moncton Weather in August
What's the weather like in Moncton (New Brunswick) in August 2025?
The climate in Moncton during August can be summarized as warm and a little damp.
August is in the summer in Moncton and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around 24°C (75°F), whilst at night 12°C (54°F) is normal.
| Daytime temperature | 23.9°C 75°F |
|---|---|
| Nightly temperature | 12.1°C 53.8°F |
| Average temperature | 18°C 64.4°F |
| Daily sunshine | 8 hrs |
| Avg rainfall | 81 mm 3.2 ins |
| Rainy days | 11 days |
| Sea temperature | 16.7°C 62.1°F |
| Humidity | 77% |
| Windspeed | 13.7kph 9 mph |
On average August is the 2nd driest month of the year in Moncton with around 81mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 8 hours of sunshine per day.
August temperatures in Moncton
August rainfall
August hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Moncton in August 2025.
Other monthly averages
Best places to visit in August
Moncton weather stats
| Hottest month: | July | 24.4°C 75.9°F |
|---|---|---|
| Driest month: | September | 79mm 3.1ins |
| Sunniest month: | August | 8hrs |
| Coldest month: | January | -3.6°C 25.5°F |
| Wettest month: | December | 119mm 4.7ins |
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