Click on a day for an hourly weather forecast
The temperatures in Oakville in May are quite cold with temperatures between 9°C and 17°C, warm clothes are a must.
You can expect rain for roughly half of the month of May in Oakville. 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 Oakville in May 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 |