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The temperatures in Niagara Falls 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 Niagara Falls. 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 Falls in May 2025.
If you’re planning to visit Niagara Falls in the near future, we highly recommend that you review the 14 day weather forecast for Niagara Falls before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -6° | 6 | 5 | 21 | 104 mm | Awful | Niagara Falls in January |
| February | -1° / -6° | 6 | 4 | 19 | 117 mm | Awful | Niagara Falls in February |
| March | 4° / -2° | 9 | 9 | 13 | 115 mm | Awful | Niagara Falls in March |
| April | 10° / 3° | 10 | 14 | 6 | 145 mm | Awful | Niagara Falls in April |
| May | 18° / 10° | 8 | 23 | 0 | 146 mm | Ok | Niagara Falls in May |
| June | 22° / 15° | 8 | 22 | 0 | 173 mm | Ok | Niagara Falls in June |
| July | 26° / 18° | 9 | 22 | 0 | 171 mm | Good | Niagara Falls in July |
| August | 26° / 19° | 7 | 24 | 0 | 161 mm | Good | Niagara Falls in August |
| September | 22° / 15° | 7 | 23 | 0 | 121 mm | Ok | Niagara Falls in September |
| October | 15° / 10° | 10 | 20 | 1 | 146 mm | Ok | Niagara Falls in October |
| November | 8° / 3° | 9 | 14 | 7 | 103 mm | Awful | Niagara Falls in November |
| December | 2° / -1° | 8 | 7 | 17 | 115 mm | Awful | Niagara Falls in December |