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The temperatures in Guelph 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 Guelph. 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 Guelph can expect a few days of snow in May.
Our weather forecast can give you a great sense of what weather to expect in Guelph in May 2025.
If you’re planning to visit Guelph in the near future, we highly recommend that you review the 14 day weather forecast for Guelph before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -4° / -10° | 8 | 4 | 22 | 105 mm | Awful | Guelph in January |
| February | -3° / -9° | 5 | 3 | 20 | 93 mm | Awful | Guelph in February |
| March | 3° / -4° | 8 | 9 | 14 | 108 mm | Awful | Guelph in March |
| April | 10° / 1° | 9 | 14 | 7 | 142 mm | Awful | Guelph in April |
| May | 18° / 8° | 8 | 22 | 1 | 132 mm | Ok | Guelph in May |
| June | 22° / 12° | 8 | 22 | 0 | 138 mm | Ok | Guelph in June |
| July | 25° / 15° | 9 | 22 | 0 | 154 mm | Good | Guelph in July |
| August | 24° / 15° | 7 | 24 | 0 | 133 mm | Good | Guelph in August |
| September | 21° / 11° | 5 | 25 | 0 | 93 mm | Good | Guelph in September |
| October | 13° / 6° | 9 | 20 | 2 | 134 mm | Awful | Guelph in October |
| November | 6° / 0° | 8 | 11 | 11 | 95 mm | Awful | Guelph in November |
| December | 0° / -4° | 8 | 5 | 19 | 102 mm | Awful | Guelph in December |