Wilmington (DE) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Wilmington.
Climate overview of Wilmington
Wilmington, Delaware, United States of America, sees big temperature differences between seasons, with July peaking at 31°C (88°F) and January dropping to 5°C (41°F).
With around 1252 mm (49 in) of annual rain/snowfall, Wilmington has a notably wet climate. However, this rain/snowfall is not evenly distributed — the city has very warm summers and cold winters. The wettest month is June. The most sunshine falls in July, with an average of 9.2 hours of daily sunshine.
Wilmington Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Wilmington - and find the best time to visit.
Monthly Temperature in Wilmington
Visitors to Wilmington can expect significant temperature changes throughout the year. Average daytime temperatures reach a very warm 31°C (88°F) in July. In January, the coolest month of the year, temperatures drop to a chilly 5°C (41°F).
At night, temperatures range from around 21°C (70°F) in July to -4°C (25°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Wilmington
Wilmington is known for its substantial rain/snowfall, with annual precipitation reaching 1252 mm (49 in). Wilmington experiences moderate seasonal variation in rainfall, with monthly averages ranging from 145 mm (5.7 in) in June, the wettest month, and 75 mm (3 in) in November, the driest month. For more details, please visit our Wilmington Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Wilmington
Wilmington can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 9.2 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 4.7 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Wilmington by Month
The relative humidity is high throughout the year in Wilmington.
The city experiences its highest humidity in September, reaching 72%. In April, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Wilmington
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May
- Warmest weather: July
- Most sunshine: June and July
- Seasonal pattern: Very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -4°C (25°F).
Frequently asked questions about the climate in Wilmington
What is the best time to visit Wilmington?
May typically offers the most optimal weather in Wilmington. In contrast, January, February and December tend to have less optimal conditions. Wilmington has very warm summers and cold winters.
What temperatures can I expect in Wilmington?
Daytime highs range from 5°C (41°F) in January to 31°C (88°F) in July. Nighttime lows range from -4°C (25°F) to 21°C (70°F). Temperatures vary considerably through the year.
How much rain does Wilmington get?
Annual rainfall is around 1252 mm (49 in). June is the wettest month with 145 mm (5.7 in), while November is the driest with 75 mm (3 in).
How sunny is Wilmington?
Wilmington receives around 2,500 hours of sunshine per year. July is the sunniest month with 275 hours, while December is the cloudiest with just 140 hours. Overall, Wilmington enjoys abundant sunshine.
Wilmington 3-Day Forecast
Wilmington (DE) 3-Day Forecast
Wilmington on the map
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