Click on a day for an hourly weather forecast
The temperatures in Windsor in May are usually low and can range between 10°C and 18°C.
You can expect rain for roughly half of the month of May in Windsor. 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 Windsor in May 2025.
If you’re planning to visit Windsor in the near future, we highly recommend that you review the 14 day weather forecast for Windsor before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -7° | 5 | 9 | 17 | 74 mm | Awful | Windsor in January |
| February | -1° / -6° | 5 | 8 | 16 | 76 mm | Awful | Windsor in February |
| March | 5° / -1° | 7 | 16 | 8 | 86 mm | Awful | Windsor in March |
| April | 11° / 4° | 10 | 17 | 3 | 161 mm | Awful | Windsor in April |
| May | 18° / 10° | 9 | 22 | 0 | 193 mm | Ok | Windsor in May |
| June | 23° / 16° | 9 | 21 | 0 | 209 mm | Good | Windsor in June |
| July | 26° / 19° | 9 | 22 | 0 | 178 mm | Good | Windsor in July |
| August | 26° / 19° | 7 | 24 | 0 | 162 mm | Good | Windsor in August |
| September | 22° / 15° | 7 | 23 | 0 | 122 mm | Ok | Windsor in September |
| October | 15° / 9° | 7 | 24 | 0 | 116 mm | Ok | Windsor in October |
| November | 8° / 3° | 6 | 19 | 5 | 78 mm | Bad | Windsor in November |
| December | 2° / -2° | 7 | 12 | 13 | 71 mm | Awful | Windsor in December |