Click on a day for an hourly weather forecast
The temperatures in Moncton in August are comfortable with low of 14°C and and high up to 24°C.
You can expect about 3 to 8 days of rain in Moncton during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Moncton in August 2025.
If you’re planning to visit Moncton in the near future, we highly recommend that you review the 14 day weather forecast for Moncton before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -4° / -11° | 6 | 5 | 21 | 135 mm | Awful | Moncton in January |
| February | -4° / -11° | 6 | 3 | 21 | 143 mm | Awful | Moncton in February |
| March | 0° / -6° | 7 | 6 | 19 | 118 mm | Awful | Moncton in March |
| April | 7° / 0° | 10 | 11 | 9 | 120 mm | Awful | Moncton in April |
| May | 14° / 5° | 9 | 22 | 1 | 128 mm | Ok | Moncton in May |
| June | 20° / 10° | 8 | 22 | 0 | 152 mm | Ok | Moncton in June |
| July | 24° / 14° | 7 | 24 | 0 | 128 mm | Good | Moncton in July |
| August | 24° / 14° | 6 | 25 | 0 | 112 mm | Perfect | Moncton in August |
| September | 19° / 10° | 5 | 25 | 0 | 106 mm | Good | Moncton in September |
| October | 12° / 5° | 8 | 22 | 2 | 138 mm | Awful | Moncton in October |
| November | 6° / 0° | 8 | 13 | 9 | 151 mm | Awful | Moncton in November |
| December | 0° / -6° | 8 | 8 | 16 | 158 mm | Awful | Moncton in December |