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.

---

• Wilmington - May »
  In Wilmington, Delaware, in May, during 18.7 rainfall days, 3.19" (81mm) of precipitation is typically accumulated. Throughout the year, in Wilmington, there are 21.9 snowfall days, and 12.05" (306mm) of snow is accumulated.
• Dover - May »
  In Dover in May, it is raining for 15.6 days, with typically 2.4" (61mm) of accumulated precipitation. In Dover, during May, the rain falls for 15.6 days and regularly aggregates up to 2.4" (61mm) of precipitation.
• Newark - May »
  On the last day of the month, in Newark, sunrise is at 5:37 am and sunset at 8:23 pm EDT. In Newark during the entire year, the rain falls for 168.9 days and collects up to 34.84" (885mm) of precipitation.
• Middletown - May »
  The months with the highest humidity in Middletown are May, June and September, with an average relative humidity of 78%. The months with the highest humidity in Middletown are May, June and September, with an average relative humidity of 78%.
• Smyrna - May »
  On the first day of May in Smyrna sunrise is at 6:03 am and sunset at 7:55 pm. On the first day of May in Smyrna sunrise is at 6:03 am and sunset at 7:55 pm.
• Milford - May »
  In Milford during the entire year, the rain falls for 152.4 days and collects up to 25.94" (659mm) of precipitation. In Milford in May, during 16.1 rainfall days, 2.28" (58mm) of precipitation is typically accumulated.
• Seaford - May »
  May, August and September, with an average relative humidity of 80%, are most humid months in Seaford, Delaware. The months with the highest UV index in Seaford are May through August, with an average maximum UV index of 6.
• Georgetown - May »
  In Georgetown, in May, it is raining for 15.3 days, with typically 2.17" (55mm) of accumulated precipitation. With an average relative humidity of 80%, May is the most humid month in Georgetown.
• Elsmere - May »
  Throughout the year, in Elsmere there are 17.8 snowfall days, and 10.28" (261mm) of snow is accumulated. On the last day of the month, in Elsmere, sunrise is at 5:36 am and sunset at 8:23 pm EDT.
• New Castle - May »
  In New Castle, Delaware, during May, the rain falls for 16.8 days and regularly aggregates up to 2.05" (52mm) of precipitation. In New Castle, during the entire year, the rain falls for 143.2 days and collects up to 21.89" (556mm) of precipitation.
• Lewes - May »
  On the last day of the month, in Lewes sunrise is at 5:37 am and sunset at 8:18 pm EDT. In Lewes during the entire year, the rain falls for 173.6 days and collects up to 36.97" (939mm) of precipitation.
• Rehoboth Beach - May »
  In Rehoboth Beach in May, during 9 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. May is the most humid month in Rehoboth Beach, with an average relative humidity of 82%.