Click on a day for an hourly weather forecast
The temperatures in Delaware in May are comfortable with low of 14°C and and high up to 22°C.
You can expect rain for roughly half of the month of May in Delaware. 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 Delaware in May 2025.
If you’re planning to visit Delaware in the near future, we highly recommend that you review the 14 day weather forecast for Delaware before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 4° / -2° | 6 | 19 | 6 | 105 mm | Awful | Delaware in January |
| February | 6° / -1° | 7 | 16 | 6 | 136 mm | Awful | Delaware in February |
| March | 10° / 3° | 8 | 20 | 3 | 140 mm | Awful | Delaware in March |
| April | 16° / 8° | 7 | 23 | 0 | 121 mm | Ok | Delaware in April |
| May | 22° / 14° | 8 | 23 | 0 | 153 mm | Ok | Delaware in May |
| June | 26° / 18° | 8 | 22 | 0 | 191 mm | Good | Delaware in June |
| July | 29° / 21° | 10 | 21 | 0 | 208 mm | Ok | Delaware in July |
| August | 28° / 20° | 8 | 23 | 0 | 203 mm | Good | Delaware in August |
| September | 25° / 17° | 6 | 24 | 0 | 139 mm | Perfect | Delaware in September |
| October | 19° / 12° | 6 | 25 | 0 | 173 mm | Good | Delaware in October |
| November | 12° / 6° | 5 | 25 | 0 | 110 mm | Ok | Delaware in November |
| December | 8° / 2° | 7 | 21 | 3 | 154 mm | Awful | Delaware in December |