Click on a day for an hourly weather forecast
The temperatures in Mount Vernon in May are usually low and can range between 12°C and 20°C.
You can expect rain for roughly half of the month of May in Mount Vernon. 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 Mount Vernon in May 2025.
If you’re planning to visit Mount Vernon in the near future, we highly recommend that you review the 14 day weather forecast for Mount Vernon before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 2° / -3° | 5 | 18 | 8 | 101 mm | Awful | Mount Vernon in January |
| February | 4° / -3° | 6 | 13 | 9 | 120 mm | Awful | Mount Vernon in February |
| March | 8° / 2° | 7 | 19 | 5 | 133 mm | Awful | Mount Vernon in March |
| April | 14° / 7° | 8 | 22 | 1 | 128 mm | Ok | Mount Vernon in April |
| May | 20° / 12° | 8 | 23 | 0 | 141 mm | Ok | Mount Vernon in May |
| June | 26° / 17° | 7 | 23 | 0 | 152 mm | Good | Mount Vernon in June |
| July | 29° / 21° | 10 | 21 | 0 | 202 mm | Ok | Mount Vernon in July |
| August | 29° / 21° | 7 | 24 | 0 | 189 mm | Ok | Mount Vernon in August |
| September | 25° / 17° | 5 | 25 | 0 | 132 mm | Perfect | Mount Vernon in September |
| October | 18° / 12° | 6 | 25 | 0 | 147 mm | Good | Mount Vernon in October |
| November | 11° / 5° | 5 | 24 | 1 | 96 mm | Ok | Mount Vernon in November |
| December | 6° / 1° | 7 | 19 | 5 | 151 mm | Awful | Mount Vernon in December |