Click on a day for an hourly weather forecast
The temperatures in Oakville in August are comfortable with low of 17°C and and high up to 25°C.
You can expect about 3 to 8 days of rain in Oakville 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 Oakville in August 2025.
If you’re planning to visit Oakville in the near future, we highly recommend that you review the 14 day weather forecast for Oakville before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -3° / -7° | 8 | 6 | 18 | 97 mm | Awful | Oakville in January |
| February | -2° / -7° | 8 | 4 | 17 | 96 mm | Awful | Oakville in February |
| March | 4° / -2° | 10 | 12 | 10 | 109 mm | Awful | Oakville in March |
| April | 10° / 3° | 9 | 16 | 4 | 139 mm | Awful | Oakville in April |
| May | 17° / 9° | 8 | 23 | 0 | 131 mm | Ok | Oakville in May |
| June | 22° / 14° | 7 | 23 | 0 | 140 mm | Ok | Oakville in June |
| July | 25° / 17° | 9 | 22 | 0 | 156 mm | Good | Oakville in July |
| August | 25° / 17° | 7 | 24 | 0 | 142 mm | Good | Oakville in August |
| September | 22° / 14° | 5 | 25 | 0 | 97 mm | Good | Oakville in September |
| October | 14° / 8° | 8 | 22 | 0 | 130 mm | Ok | Oakville in October |
| November | 7° / 2° | 7 | 17 | 6 | 87 mm | Awful | Oakville in November |
| December | 2° / -2° | 9 | 7 | 15 | 99 mm | Awful | Oakville in December |