Click on a day for an hourly weather forecast
The temperatures in Niagara On The Lake in May are quite cold with temperatures between 9°C and 16°C, warm clothes are a must.
You can expect rain for roughly half of the month of May in Niagara On The Lake. 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 Niagara On The Lake in May 2025.
If you’re planning to visit Niagara On The Lake in the near future, we highly recommend that you review the 14 day weather forecast for Niagara On The Lake before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -6° | 8 | 7 | 18 | 102 mm | Awful | Niagara On The Lake in January |
| February | -1° / -6° | 7 | 5 | 17 | 109 mm | Awful | Niagara On The Lake in February |
| March | 4° / -2° | 10 | 11 | 10 | 114 mm | Awful | Niagara On The Lake in March |
| April | 10° / 3° | 9 | 17 | 4 | 139 mm | Awful | Niagara On The Lake in April |
| May | 16° / 9° | 8 | 23 | 0 | 147 mm | Ok | Niagara On The Lake in May |
| June | 21° / 14° | 7 | 23 | 0 | 158 mm | Ok | Niagara On The Lake in June |
| July | 25° / 18° | 8 | 23 | 0 | 156 mm | Good | Niagara On The Lake in July |
| August | 25° / 19° | 7 | 24 | 0 | 148 mm | Good | Niagara On The Lake in August |
| September | 22° / 15° | 6 | 24 | 0 | 113 mm | Good | Niagara On The Lake in September |
| October | 15° / 10° | 9 | 21 | 1 | 145 mm | Ok | Niagara On The Lake in October |
| November | 8° / 3° | 8 | 16 | 6 | 101 mm | Awful | Niagara On The Lake in November |
| December | 2° / -1° | 9 | 8 | 15 | 109 mm | Awful | Niagara On The Lake in December |