Wilmington Weather Records

Wilmington, Delaware weather averages and records from 1894–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Wilmington, Delaware was 107 °F which occurred on August 7, 1918.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Wilmington, Delaware was -15 °F which occurred on February 9, 1934.
Lowest Temperatures: All-Time By Year
Wilmington Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 41.2 25.4 75 -14 3.2 6.0
February 43.9 26.8 78 -15 2.8 7.8
March 52.3 33.7 86 2 4.2 3.1
April 64.0 43.3 97 11 3.5 0.1
May 73.3 53.3 98 30 3.5 0.0
June 82.0 62.8 102 40 4.7 0.0
July 86.6 68.1 103 48 4.4 0.0
August 84.7 66.5 107 43 4.0 0.0
September 78.3 59.2 100 32 4.4 0.0
October 66.8 47.1 98 23 3.7 0.0
November 55.7 37.2 85 11 3.1 0.2
December 45.8 30.1 75 -7 3.9 2.9
Entire year 64.7 46.2 107 -15 45.3 20.2
More Wilmington Weather Records
1894–2024
Highest daily low 84 °F August 7, 1918
Lowest daily high 4 °F January 19, 1994
Greatest daily range
(Difference of high and low)
50 °F May 14, 1940
Greatest difference in daily high
over two conscutive days
46 °F Jan 6–7, 2014
Most daily precipitation 8.3 inches September 16, 1999
Most monthly precipitation 14.9 inches August 1911
Most yearly precipitation 61.4 inches 2018
Most yearly days with precipitation 149 2003
Earliest snow in season October 10 1979
Latest snow in season April 20 1983
Most daily snow 22.0 inches January 7, 1996
Most monthly snow 46.9 inches February 2010
Most yearly snow 57.0 inches 2010
Most snow in a winter 72.7 inches 2009–2010
Greatest snow accumulation 25.0 inches February 18, 2003
Earliest freeze October 1 1947
Earliest day ≥ 80 °F March 8 2000
Earliest day ≥ 90 °F April 10 2013
Earliest day ≥ 100 °F June 1 1895
Latest freeze May 1 1978
Latest day ≥ 80 °F November 15 1993
Latest day ≥ 90 °F October 7 2007
Latest day ≥ 100 °F September 11 1983
Most days in a year < 0 °F 7 1979
Most days in a year < 32 °F 112 1943
Most days in a year ≥ 80 °F 122 1895
Most days in a year ≥ 90 °F 59 1895
Most days in a year ≥ 100 °F 6 1896
Wilmington Weather Streaks
Most consecutive days...
With precipitation 16 days May 16–31, 1894
Without precipitation 34 days Jan 7 – Feb 9, 1909
With snow 5 days Jan 24–28, 2004
High temperature at or
below freezing
15 days Feb 5–19, 1979
High temperature ≥ 80 °F 72 days Jul 5 – Sep 14, 2016
High temperature ≥ 90 °F 16 days Aug 3–18, 1895
High temperature ≥ 100 °F 3 days Jul 9–11, 1936
Plant Hardiness Zone
7B
Wilmington is in plant hardiness zone 7B
based on average yearly minimum temperature from 1991–2020
Facts About Wilmington Weather
Wilmington Weather by Year
More Wilmington Weather
Compare Wilmington to:
Weather Station Details
Years Station Coordinates
1948–2024 New Castle Airport location
1932–1947 Wilmington Porter Research location
1894–1931 Wilmington City Hall location