Wilmington August Weather

Averages and records for weather in Wilmington, Delaware in the month of August.
Typical Wilmington August Weather
1991–2020
Average daily high 84.7 °F
Average daily low 66.5 °F
Average monthly precipitation 4.0 inches
Average monthly snow none
Daily chance of precipitation 28.8%
Daily chance of snow 0%
Wilmington August Weather Records
1894–2024
Highest temperature 107 °F August 7, 1918
Lowest temperature 43 °F August 29, 1982
Highest daily low 84 °F August 7, 1918
Lowest daily high 61 °F August 27, 1927
Hottest average high temperature 90.6 °F 1895
Coldest average high temperature 76.2 °F 1927
Most daily precipitation 6.4 inches August 1, 1945
Most monthly precipitation 14.9 inches 1911
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
August 1 86.0 68.2 98 56
August 2 85.8 68.1 101 55
August 3 85.8 68.0 97 52
August 4 85.7 67.9 96 53
August 5 85.5 67.9 101 49
August 6 85.4 67.7 103 51
August 7 85.3 67.6 107 53
August 8 85.3 67.4 105 53
August 9 85.2 67.3 102 54
August 10 85.1 67.1 99 54
August 11 85.0 66.9 101 52
August 12 84.9 66.8 102 50
August 13 84.9 66.7 99 49
August 14 84.8 66.7 96 47
August 15 84.7 66.6 98 48
August 16 84.6 66.4 98 52
August 17 84.5 66.3 94 49
August 18 84.4 66.1 96 51
August 19 84.2 65.9 95 51
August 20 84.1 65.8 100 48
August 21 84.1 65.7 94 50
August 22 84.0 65.6 95 48
August 23 83.8 65.4 93 47
August 24 83.7 65.3 95 48
August 25 83.6 65.1 96 48
August 26 83.5 65.0 98 49
August 27 83.3 64.8 98 49
August 28 83.1 64.5 100 46
August 29 82.9 64.2 98 43
August 30 82.8 64.0 101 45
August 31 82.6 63.8 101 47
Weather Station Details
Years Station Coordinates
1948–2024 New Castle Airport location
1932–1947 Wilmington Porter Research location
1894–1931 Wilmington City Hall location