Click on a day for an hourly weather forecast
The temperatures in Joliette in August are comfortable with low of 14°C and and high up to 24°C.
You can expect rain for roughly half of the month of August in Joliette. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Joliette in August 2025.
If you’re planning to visit Joliette in the near future, we highly recommend that you review the 14 day weather forecast for Joliette before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -7° / -15° | 9 | 16 | 5 | 27 mm | Awful | Joliette in January |
| February | -5° / -15° | 9 | 13 | 7 | 29 mm | Awful | Joliette in February |
| March | 0° / -9° | 7 | 17 | 7 | 29 mm | Awful | Joliette in March |
| April | 8° / -2° | 7 | 19 | 3 | 44 mm | Bad | Joliette in April |
| May | 17° / 6° | 8 | 23 | 0 | 36 mm | Good | Joliette in May |
| June | 22° / 11° | 8 | 23 | 0 | 46 mm | Good | Joliette in June |
| July | 25° / 14° | 8 | 24 | 0 | 39 mm | Perfect | Joliette in July |
| August | 24° / 14° | 8 | 23 | 0 | 44 mm | Perfect | Joliette in August |
| September | 19° / 10° | 7 | 23 | 0 | 37 mm | Good | Joliette in September |
| October | 12° / 4° | 8 | 22 | 1 | 45 mm | Ok | Joliette in October |
| November | 4° / -3° | 7 | 20 | 3 | 28 mm | Awful | Joliette in November |
| December | -3° / -10° | 10 | 14 | 7 | 37 mm | Awful | Joliette in December |