May weather forecast
Delaware, USA

May in Delaware marks the full arrival of spring and the anticipation of summer. Temperatures continue to rise throughout the month, creating an agreeable climate that is neither too hot nor too cold. Compared to the transitional weather of April, May exhibits more stability and warmth, leaving behind the last remnants of winter's chill.

Daytime temperatures are pleasant, and the nights, while cooler, are generally comfortable. The frost that once penetrated the soil during winter has now completely dissipated, and the landscape flourishes with growth.

Rainfall in May contributes to Delaware's annual average of 44" (1118mm) to 47" (1194mm), with precipitation being fairly uniform over the year. The rain helps nourish the blooming flora, enhancing the beauty of the state's natural environment.

May does not usually see any extreme weather conditions or significant deviations in temperature or precipitation. Its mild and agreeable climate is influenced by the Atlantic Ocean, the Atlantic High, and the Appalachian Mountains, factors that continue to moderate and shape the weather in Delaware.

In the southern part of the state, temperatures may be slightly milder, creating a longer growing season that becomes more evident in May. Overall, the month symbolizes a time of growth and rejuvenation, bridging the gap between spring's freshness and the approaching warmth of summer.

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• Wilmington - May »
  In Wilmington in May, it is raining for 18.7 days, with typically 3.19" (81mm) of accumulated precipitation. On the first day of May in Wilmington sunrise is at 6:01 am and sunset at 7:56 pm.
• Dover - May »
  The most humid month in Dover is May, with an average relative humidity of 79%. On the first day of May in Dover sunrise is at 6:02 am and sunset at 7:55 pm.
• Newark - May »
  In Newark during the entire year, the rain falls for 168.9 days and collects up to 34.84" (885mm) of precipitation. In Newark, during the entire year, snow falls for 18.1 days and aggregates up to 8.86" (225mm) of snow.
• Middletown - May »
  May, June and September, with an average relative humidity of 78%, are most humid months in Middletown. May, June and September, with an average relative humidity of 78%, are the most humid months in Middletown.
• Smyrna - May »
  With an average relative humidity of 79%, May is the most humid month in Smyrna. In Smyrna in May, during 18.3 rainfall days, 3.07" (78mm) of precipitation is typically accumulated.
• Milford - May »
  On the last day of the month, in Milford, sunrise is at 5:38 am and sunset at 8:20 pm EDT. In Milford, during the entire year, snow falls for 10.4 days and aggregates up to 4.29" (109mm) of snow.
• Seaford - May »
  In Seaford during May, the rain falls for 9.9 days and regularly aggregates up to 0.59" (15mm) of precipitation. May through August, with an average maximum UV index of 6, are months with the highest UV index in Seaford, Delaware.
• Georgetown - May »
  On the last day of the month, in Georgetown, sunrise is at 5:38 am and sunset at 8:20 pm EDT. The months with the highest UV index in Georgetown are May through August, with an average maximum UV index of 6.
• Elsmere - May »
  In Elsmere, during May, the rain falls for 16.5 days and regularly aggregates up to 2.52" (64mm) of precipitation. In Elsmere, during May, the rain falls for 16.5 days and regularly aggregates up to 2.52" (64mm) of precipitation.
• New Castle - May »
  In New Castle, during the entire year, the rain falls for 143.2 days and collects up to 21.89" (556mm) of precipitation. In New Castle, during May, the rain falls for 16.8 days and regularly aggregates up to 2.05" (52mm) of precipitation.
• Lewes - May »
  On the first day of May in Lewes sunrise is at 6:01 am and sunset at 7:53 pm. May through August, with an average maximum UV index of 6, are months with the highest UV index in Lewes, Delaware.
• Rehoboth Beach - May »
  On the last day of the month, in Rehoboth Beach, sunrise is at 5:37 am and sunset at 8:18 pm EDT. May is the most humid month in Rehoboth Beach, Delaware, with an average relative humidity of 82%.