Click on a day for an hourly weather forecast
The temperatures in Hamilton 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 Hamilton. 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 Hamilton in May 2025.
If you’re planning to visit Hamilton in the near future, we highly recommend that you review the 14 day weather forecast for Hamilton before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -3° / -7° | 8 | 6 | 18 | 97 mm | Awful | Hamilton in January |
| February | -2° / -7° | 8 | 4 | 17 | 96 mm | Awful | Hamilton in February |
| March | 4° / -2° | 10 | 12 | 10 | 109 mm | Awful | Hamilton in March |
| April | 10° / 3° | 9 | 16 | 4 | 139 mm | Awful | Hamilton in April |
| May | 17° / 9° | 8 | 23 | 0 | 131 mm | Ok | Hamilton in May |
| June | 22° / 14° | 7 | 23 | 0 | 140 mm | Ok | Hamilton in June |
| July | 25° / 17° | 9 | 22 | 0 | 156 mm | Good | Hamilton in July |
| August | 25° / 17° | 7 | 24 | 0 | 142 mm | Good | Hamilton in August |
| September | 22° / 14° | 5 | 25 | 0 | 97 mm | Good | Hamilton in September |
| October | 14° / 8° | 8 | 22 | 0 | 130 mm | Ok | Hamilton in October |
| November | 7° / 2° | 7 | 17 | 6 | 87 mm | Awful | Hamilton in November |
| December | 2° / -2° | 9 | 7 | 15 | 99 mm | Awful | Hamilton in December |