Climate averages 1991–2020
Wilmington (Delaware), United States weather
in April.
A mild, wet month: the 7th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Wilmington (Delaware), United States: daytime highs average 16.9°C and nights cool to about 6.8°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 92 mm of rain on roughly 11 days, which makes April a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 14 min on an average April day.
The nearest other city in this atlas is Philadelphia (40 km away). In April its highs average 17.2°C, about as warm as Wilmington (Delaware), United States, with 92 mm of rain.
Among the 498 cities listed in the United States, Wilmington (Delaware), United States ranks joint 317th of 498 for the warmest April highs and joint 292nd of 498 for the driest April (rainfall, lowest first). The mean April high of those 498 cities is 19.4°C; Wilmington (Delaware), United States is 2.4°C cooler than that mean.
From April to May, average highs rise by 5.1°C to 22.0°C, and monthly rainfall falls from 92 mm to 89 mm.
The annual picture
April in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Wilmington (Delaware), United States climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.5°C-3.0°C | -3.0°C | 82 | 9.2 | 9.710 h |
| February | 6.1°C-2.4°C | -2.4°C | 76 | 8.7 | 10.711 h |
| March | 10.6°C1.2°C | 1.2°C | 105 | 10.7 | 11.912 h |
| April, selected | 16.9°C6.8°C | 6.8°C | 92 | 10.5 | 13.213 h |
| May | 22.0°C12.4°C | 12.4°C | 89 | 10.8 | 14.314 h |
| June | 26.8°C17.7°C | 17.7°C | 99 | 10.4 | 14.915 h |
| July | 29.3°C20.7°C | 20.7°C | 99 | 10.9 | 14.715 h |
| August | 28.2°C19.9°C | 19.9°C | 100 | 10.4 | 13.714 h |
| September | 24.6°C16.3°C | 16.3°C | 107 | 9.6 | 12.512 h |
| October | 18.2°C10.0°C | 10.0°C | 91 | 8.1 | 11.211 h |
| November | 12.1°C4.1°C | 4.1°C | 75 | 7.9 | 10.010 h |
| December | 6.9°C-0.3°C | -0.3°C | 100 | 9.0 | 9.49 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
April in nearby cities
- Philadelphia in AprilUnited States · 40 kmHigh 17.2°C · Low 6.7°C · 92 mm rain
- Camden in AprilUnited States · 42 kmHigh 17.2°C · Low 6.6°C · 89 mm rain
- Cherry Hill in AprilUnited States · 49 kmHigh 17.0°C · Low 6.8°C · 89 mm rain
- Reading, United States in AprilUnited States · 73 kmHigh 16.4°C · Low 5.7°C · 96 mm rain
- Trenton in AprilUnited States · 86 kmHigh 16.6°C · Low 5.9°C · 92 mm rain
- Allentown in AprilUnited States · 96 kmHigh 15.8°C · Low 4.5°C · 99 mm rain
- Bethlehem, United States in AprilUnited States · 99 kmHigh 15.7°C · Low 4.5°C · 99 mm rain
- Baltimore in AprilUnited States · 105 kmHigh 17.2°C · Low 7.0°C · 97 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Wilmington) is explained once on the Wilmington (Delaware), United States year overview and on the Sources, method and limits page.