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April Weather in Delaware, United States

Last updated: June 24, 2025

In April, the average temperature in Delaware, United States is a cool 11°C (52°F). You'll experience a range of temperatures, with a possible minimum of -6°C (22°F) and a maximum reaching as high as 28°C (83°F). Prepare for some rain, as 116 mm (4.6 in) of precipitation is expected over 13 days. With an average humidity of 87%, don’t forget to pack accordingly!

April Temperature in Delaware

In April in Delaware, the average temperature is 11°C (52°F). Maximum temperatures can reach 28°C (83°F), while minimums can drop to as low as -6°C (22°F). Be prepared for a wide range of temperatures when planning your travel!

April Weather in Delaware: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Delaware, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Delaware, April typically has an average temperature of 11°C (52°F), with highs reaching up to 28°C (83°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec303342516371757368574136
Data source: Temperature data for Delaware generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Delaware

In Delaware in April, the total precipitation amount reaches 116 mm (4.6 in) over the course of 13 days.

April Precipitation Trends in Delaware

The chart displays monthly precipitation patterns in Delaware, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Delaware, April typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec781041051161241441117486999697
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Delaware

In Delaware in April, humidity is 87%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that can make your clothes cling uncomfortably, leaving you feeling slightly weighed down while exploring the area.

April Average Humidity in Delaware

This chart illustrates the average monthly humidity levels in Delaware, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Delaware is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Delaware

In Delaware in April, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Delaware.

Maximum UV Index Levels in Delaware for April

The chart shows the monthly maximum UV Index (UVI) for Delaware in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Delaware typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
Data source: Delaware April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How April Weather in Delaware Compares to Other Months

Weather in Delaware varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Delaware, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Delaware, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)78 mm (3.1 inches)88%moderate
February Weather1°C (34°F)104 mm (4.1 inches)87%moderate
March Weather5°C (42°F)105 mm (4.1 inches)87%high
April Weather11°C (52°F)116 mm (4.6 inches)87%very high
May Weather17°C (63°F)124 mm (4.9 inches)81%very high
June Weather22°C (72°F)144 mm (5.7 inches)82%very high
July Weather24°C (76°F)111 mm (4.4 inches)81%very high
August Weather23°C (73°F)74 mm (2.9 inches)78%very high
September Weather20°C (69°F)86 mm (3.4 inches)78%very high
October Weather14°C (58°F)99 mm (3.9 inches)82%high
November Weather5°C (42°F)96 mm (3.8 inches)89%moderate
December Weather2°C (36°F)97 mm (3.8 inches)86%moderate

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