Click on a day for an hourly weather forecast
The temperatures in Brockville in May are quite cold with temperatures between 8°C and 18°C, warm clothes are a must.
You can expect rain for roughly half of the month of May in Brockville. 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.
Please note that Brockville can expect a few days of snow in May.
Our weather forecast can give you a great sense of what weather to expect in Brockville in May 2025.
If you’re planning to visit Brockville in the near future, we highly recommend that you review the 14 day weather forecast for Brockville before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -5° / -12° | 5 | 6 | 21 | 91 mm | Awful | Brockville in January |
| February | -4° / -11° | 5 | 4 | 20 | 104 mm | Awful | Brockville in February |
| March | 3° / -5° | 8 | 8 | 15 | 86 mm | Awful | Brockville in March |
| April | 10° / 2° | 10 | 15 | 5 | 136 mm | Awful | Brockville in April |
| May | 18° / 8° | 8 | 22 | 1 | 133 mm | Ok | Brockville in May |
| June | 22° / 12° | 7 | 23 | 0 | 131 mm | Ok | Brockville in June |
| July | 26° / 15° | 7 | 24 | 0 | 130 mm | Good | Brockville in July |
| August | 25° / 15° | 6 | 25 | 0 | 138 mm | Perfect | Brockville in August |
| September | 21° / 11° | 5 | 25 | 0 | 103 mm | Good | Brockville in September |
| October | 14° / 6° | 8 | 22 | 1 | 125 mm | Ok | Brockville in October |
| November | 6° / -1° | 6 | 17 | 8 | 78 mm | Awful | Brockville in November |
| December | -1° / -6° | 8 | 7 | 17 | 105 mm | Awful | Brockville in December |