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March Weather in Delaware, United States

Last updated: June 24, 2025

In March, the average temperature in Delaware, United States hovers around 5°C (42°F). Expect a range from a chilly -14°C (7°F) to a balmy 24°C (75°F). During this time, the area sees about 105 mm (4.1 in) of precipitation spread over 12 days, contributing to an average humidity of 87%. Prepare accordingly for a cool and damp month!

March Temperature in Delaware

In March in Delaware, the average temperature is 5°C (42°F), with maximums reaching 24°C (75°F) and minimums plummeting to -14°C (7°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates March 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, March typically has an average temperature of 5°C (42°F), with highs reaching up to 24°C (75°F) and lows dropping to around -14°C (7°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.

March Precipitation in Delaware

In Delaware in March, the precipitation amount is 105 mm (4.1 in) over the course of 12 days.

March Precipitation Trends in Delaware

The chart displays monthly precipitation patterns in Delaware, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Delaware, March typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec781041051161241441117486999697
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Delaware

In Delaware in March humidity is 87%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and travel less inviting as the air becomes heavy and oppressive.

March Average Humidity in Delaware

This chart illustrates the average monthly humidity levels in Delaware, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, 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 March generated using information from the Copernicus Climate Change Service.

March UV Index in Delaware

In Delaware in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Delaware, you can refer to this Hourly UV Index in Delaware.

Maximum UV Index Levels in Delaware for March

The chart shows the monthly maximum UV Index (UVI) for Delaware in March, 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 March, the maximum UV index in Delaware typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
Data source: Delaware March 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 March 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 March’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 March’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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