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The weather in Ontario in April is very cold with temperatures between 3°C and 9°C, warm clothes are a must.
You can expect rain for roughly half of the month of April in Ontario. 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.
You can expect a few days of snow in Ontario during April. It’s important to get out your snow boots and warm mittens to stay warm while you explore Ontario.
Our weather forecast can give you a great sense of what weather to expect in Ontario in April 2025.
If you’re planning to visit Ontario in the near future, we highly recommend that you review the 14 day weather forecast for Ontario before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -7° | 6 | 9 | 17 | 54 mm | Awful | Ontario in January |
| February | -2° / -7° | 5 | 8 | 15 | 46 mm | Awful | Ontario in February |
| March | 4° / -2° | 7 | 15 | 9 | 63 mm | Awful | Ontario in March |
| April | 9° / 3° | 8 | 18 | 4 | 82 mm | Awful | Ontario in April |
| May | 16° / 9° | 7 | 24 | 0 | 100 mm | Ok | Ontario in May |
| June | 21° / 14° | 7 | 23 | 0 | 120 mm | Ok | Ontario in June |
| July | 25° / 19° | 7 | 24 | 0 | 128 mm | Good | Ontario in July |
| August | 25° / 19° | 5 | 26 | 0 | 114 mm | Perfect | Ontario in August |
| September | 22° / 15° | 5 | 25 | 0 | 74 mm | Good | Ontario in September |
| October | 15° / 9° | 7 | 23 | 0 | 88 mm | Ok | Ontario in October |
| November | 8° / 3° | 5 | 19 | 5 | 50 mm | Bad | Ontario in November |
| December | 2° / -2° | 7 | 11 | 13 | 52 mm | Awful | Ontario in December |