Wilmington, Delaware Climate by Month
Wilmington, Delaware, United States
Hot summers and cold winters, with rain spread through the year.
Wilmington has hot summers and cold winters, with rain spread through the year. July is the warmest month, with highs around 88°F (31°C); January is the coolest at 41°F (5°C), and nights dip to 26°F (-3°C). It gets 46 in (1165 mm) of rain a year, spread across the months.
- Warmest month
- 88°F(31°C)
- Average high, July
- Coldest nights
- 26°F(-3°C)
- Average low, January
- Rain per year
- 46 in(1165 mm)
- No clear rainy season
- Humidity
- 63%
- Sunniest: July
Best and worst months in Wilmington
Best for weatherThe most comfortable weather comes in May, with highs around 75°F (24°C) and about 3.8 in (96 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 41°F (5°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Wilmington weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 41°F(5°C) | 26°F(-3°C) | 3.3 in(85 mm) | 61% | 1.8 |
| FebFebruary | 44°F(7°C) | 27°F(-3°C) | 2.8 in(71 mm) | 56% | 2.8 |
| MarMarch | 53°F(12°C) | 34°F(1°C) | 4.2 in(106 mm) | 62% | 3.7 |
| AprApril | 65°F(18°C) | 43°F(6°C) | 3.6 in(91 mm) | 56% | 4.7 |
| MayMayBest | 75°F(24°C) | 53°F(12°C) | 3.8 in(96 mm) | 64% | 5.4 |
| JunJune | 83°F(28°C) | 63°F(17°C) | 4.4 in(111 mm) | 65% | 5.7 |
| JulJuly | 88°F(31°C) | 68°F(20°C) | 4.3 in(109 mm) | 64% | 5.7 |
| AugAugust | 86°F(30°C) | 67°F(19°C) | 4.0 in(101 mm) | 68% | 5.1 |
| SepSeptember | 79°F(26°C) | 59°F(15°C) | 4.6 in(118 mm) | 70% | 4.1 |
| OctOctober | 68°F(20°C) | 48°F(9°C) | 3.7 in(93 mm) | 67% | 3.0 |
| NovNovember | 56°F(14°C) | 38°F(3°C) | 3.1 in(80 mm) | 63% | 2.1 |
| DecDecember | 46°F(8°C) | 30°F(-1°C) | 4.1 in(104 mm) | 64% | 1.6 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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