Wilmington May Weather

Averages and records for weather in Wilmington, Delaware in the month of May.
Typical Wilmington May Weather
1991–2020
Average daily high 73.3 °F
Average daily low 53.3 °F
Average monthly precipitation 3.5 inches
Average monthly snow none
Daily chance of precipitation 37.7%
Daily chance of snow 0%
Wilmington May Weather Records
1894–2024
Highest temperature 98 °F May 30, 1895
Lowest temperature 30 °F May 1, 1978
Highest daily low 75 °F May 30, 1895
Lowest daily high 44 °F May 5, 1917
Hottest average high temperature 81.2 °F 1896
Coldest average high temperature 64.9 °F 1967
Most daily precipitation 4.1 inches May 20, 1894
Most monthly precipitation 12.0 inches 1894
Most daily snow none -
Most monthly snow none -
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
May 1 68.9 48.3 88 30
May 2 69.1 48.7 90 34
May 3 69.4 49.0 90 33
May 4 69.5 49.3 88 34
May 5 69.7 49.5 88 35
May 6 69.9 49.6 89 37
May 7 70.2 49.8 91 33
May 8 70.4 50.1 90 34
May 9 70.8 50.5 94 32
May 10 71.1 50.8 98 33
May 11 71.5 51.2 96 32
May 12 71.8 51.6 91 37
May 13 72.2 52.0 89 35
May 14 72.5 52.4 93 36
May 15 72.9 52.8 88 35
May 16 73.1 53.2 89 36
May 17 73.4 53.5 94 35
May 18 73.8 53.8 94 40
May 19 74.1 54.1 95 37
May 20 74.4 54.4 96 37
May 21 74.6 54.6 95 35
May 22 74.8 55.0 94 37
May 23 75.1 55.3 94 36
May 24 75.4 55.5 94 36
May 25 75.7 55.8 92 39
May 26 76.1 56.1 92 40
May 27 76.5 56.5 93 39
May 28 76.9 56.9 93 41
May 29 77.3 57.4 93 40
May 30 77.5 57.8 98 41
May 31 77.7 58.1 96 41
Weather Station Details
Years Station Coordinates
1948–2024 New Castle Airport location
1932–1947 Wilmington Porter Research location
1894–1931 Wilmington City Hall location