Wilmington, Delaware, Average Temperature Rankings, March 2022 1991-2020 Degrees Fahrenheit 1 46.3 43.3 3.0 65 10 1960 2012 2019 2021 top-third 2 42.5 39.5 3.0 67 8 1978 2012 2021 2020 top-third 2000,2002 3 38.7 37.5 1.2 59 16 1978 2023 2021 2020 top-third 4 39.8 37.6 2.2 66 8 1978 2012 2021 2020 top-third 5 40.7 39.5 1.2 58 15 1978 2012 2019 2021 top-third 2006 6 44.4 42.4 2.0 66 7 1978 2002,2012 2021 2020 top-tenth 7 48.1 46.2 1.9 66 7 1977 2016 2021 2020 top-tenth 8 51.9 49.9 2.0 66 7 1977 2016 2021 2020 top-tenth 9 54.7 53.0 1.7 66 7 1977 2012 2021 2020 top-tenth 10 56.7 54.9 1.8 67 6 1977 2012 2021 2020 top-tenth 11 57.2 55.7 1.5 67 6 1977 2012 2021 2020 top-tenth 2002 12 57.0 55.5 1.5 67 6 1968 2012,2020 2021 2020 top-tenth 2002 18 52.6 51.1 1.5 65 4 1978 2017,2023 2021 2020 top-tenth 24 56.5 55.5 1.0 63 6 1978 2017 2019 2021 top-tenth 2018 36 57.0 55.4 1.6 64 1 1979 2022 2021 2022 highest 48 56.7 55.4 1.3 59 2 1970,1980 2023 2021 2020 top-tenth 2019,2020 60 56.6 55.3 1.3 55 3 1970 2020,2023 2021 2021 top-tenth 2021