Wilmington, DE: Summer

31 August 2026: Summer 2026 averaged 76.6°F in Wilmington, DE, the warmest summer since 2022, tied 11th warmest of 113 (with 2021 and 2011).

Summer 2026

Mean temperature: 76.6°F; Warmest since 2022; 11th warmest of 113
Precipitation: 17.49 in; Wettest since 2023; 19th wettest of 118

A normal summer in Wilmington, DE (1991 to 2020): a mean temperature of 75.4°F, between 72.8°F and 76.7°F in eight years of ten and 12.22 in of precipitation, between 8.38 in and 18.29 in in eight years of ten.

The mean temperature of every summer in Wilmington, DE since 1894: 76.6°F in 2026; the highest is 77.8°F, in 2010.

Normal range, 72.8 to 76.7°F

Every year, ranked, as a table

Every summer in Wilmington, DE from 1894 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2026	76.6	11	86.8	5	66.4	19	17.49	19	0
2025	75.9	23	85	38	66.8	12	12.08	57	0
2024	76.2	16	85.8	18	66.7	14	14.69	37	0
2023	76.1	17	85.6	31	66.6	17	23.53	4	0
2022	76.9	5	86.5	6	67.2	5	11.07	66	0
2021	76.6	11	86.1	14	67.1	7	9.49	85	0
2020	76.7	8	85.8	18	67.5	4	17.57	17	0
2019	76.7	8	86.2	13	67.2	5	16.85	25	0
2018	76.1	17	85.2	37	67	9	15.42	28	0
2017	75	38	84.2	49	65.9	28	14.96	31	0
2016	77	3	86.3	10	67.6	3	11.59	62	0
2015	75.2	35	84.2	49	66.2	23	16.36	26	0
2014	73.8	66	83.3	71	64.3	60	15.74	27	0
2013	75.4	30	83.8	57	67	9	22.93	6	0
2012	76.4	14	86.4	9	66.4	19	9.48	86	0
2011	76.6	11	86.5	6	66.7	14	20.92	8	0
2010	77.8	1	87.6	4	67.9	2	9.32	88	0
2009	73.6	75	82.4	96	64.7	51	17.34	21	0
2008	75.4	30	85.7	27	65.2	41	8.56	98	0
2007	75.4	30	84.8	41	65.9	28	9.25	90	0
2006	75.4	30	84.4	48	66.4	19	18.04	16	0
2005	76	20	84.8	41	67.1	7	8.42	101	0
2004	72.6	100	81	110	64.3	60	20.55	9	0
2003	73.7	68	81.9	102	65.4	38	16.96	22	0
2002	75.7	26	85.7	27	65.8	32	8.39	102	0
2001	74.3	55	83.6	67	65	46	9.28	89	0
2000	72.5	101	80.9	111	64.1	66	11.94	60	0
1999	75.8	25	85.7	27	65.9	28	6.75	113	0
1998	73.7	68	83.2	74	64.2	63	9.98	78	0
1997	72.8	93	83	78	62.5	101	8.49	99	0
1996	73.7	68	82.3	98	65.1	44	14.29	44	0
1995	76	20	85.8	18	66.2	23	6.99	112	0
1994	76.3	15	85.7	27	66.9	11	14.80	35	0
1993	76.7	8	86.5	6	66.8	12	8.29	103	0
1992	72.7	98	82.1	100	63.3	84	9.69	83	0
1991	75.9	23	85.5	33	66.2	23	12.50	55	0
1990	74.7	44	83.8	57	65.6	36	14.36	43	0
1989	74.8	41	83	78	66.7	14	20.03	11	0
1988	76.1	17	86.1	14	66.1	26	11.53	64	0
1987	75.7	26	85.3	35	66	27	10.61	71	0
1986	73.9	63	83.5	68	64.2	63	10.92	69	0
1985	73.9	63	83.3	71	64.4	59	10.56	74	0
1984	74.7	44	84.2	49	65.2	41	12.63	53	0
1983	75.5	29	86.3	10	64.6	54	7.56	109	0
1982	73.1	87	82.8	85	63.4	81	12.08	57	0
1981	74.3	55	83.7	62	64.9	47	10.40	76	0
1980	75	38	85.3	35	64.7	51	8.81	96	0
1979	72.8	93	81.9	102	63.6	77	14.88	34	0
1978	73.7	68	82.9	83	64.5	58	14.50	41	0
1977	73.6	75	83	78	64.1	66	10.61	71	0
1976	73.4	82	82.8	85	64	69	8.47	100	0
1975	74.5	47	83.2	74	65.8	32	14.24	45	0
1974	74.4	52	83.7	62	65.2	41	10.57	73	0
1973	77.3	2	85.6	31	69.1	1	10.45	75	0
1972	73.7	68	82.6	92	64.8	48	9.81	81	0
1971	74.4	52	84	55	64.8	48	14.53	40	0
1970	75	38	84.1	53	65.9	28	14.50	41	0
1969	74.8	41	83.1	76	66.5	18	12.44	56	0
1968	75.1	37	84.7	45	65.4	38	5.81	117	0
1967	72.8	93	81.6	104	64	69	18.62	14	0
1966	74.8	41	85.8	18	63.8	75	5.21	118	0
1965	72.7	98	82.5	95	62.8	98	7.50	110	0
1964	73.1	87	83	78	63.2	89	6.55	115	0
1963	72.9	91	83.5	68	62.3	104	8.94	95	0
1962	72.3	103	82.1	100	62.5	101	6.70	114	0
1961	73.4	82	82.8	85	64	69	11.69	61	0
1960	73	90	82.4	96	63.5	79	12.63	53	0
1959	74.5	47	83.9	56	65.1	44	15.19	30	0
1958	72.3	103	81.4	106	63.3	84	19.68	12	0
1957	74.4	52	85.4	34	63.4	81	7.39	111	0
1956	72.8	93	82.6	92	63.1	94	14.55	39	0
1955	76	20	85.8	18	66.3	22	18.59	15	0
1954	73.7	68	84.9	39	62.6	100	8.19	104	0
1953	74.5	47	85.8	18	63.3	84	7.62	108	0
1952	75.4	30	85.9	16	64.8	48	13.01	50	0
1951	73.4	82	83.7	62	63.1	94	11.34	65	0
1950	72	108	82.9	83	61.2	111	9.85	80	0
1949	75.6	28	85.9	16	65.3	40	10.69	70	0
1948	73.3	85	83.4	70	63.2	89	10.98	68	0
1947	72.5	101	81.6	104	63.2	89			3
1946	70.2	112	80.1	112	60.2	112	17.44	20	0
1945	72.3	103	82.7	91	61.9	107	25.41	3	0
1944	74.1	61	85.8	18	62.4	103	9.90	79	1
1943	75.2	35	86.3	10	64.1	66	9.04	94	0
1942	73.1	87	83.1	76	63.2	89	21.00	7	0
1941	72.9	91	83.8	57	62	106			0
1940	72.2	106	82.8	85	61.6	109	9.24	92	0
1939	74.3	55	84.8	41	63.9	74			0
1938	74.2	59	84.6	46	64	69	20.55	9	3
1937	74.5	47	84.5	47	64.6	54			1
1936	74.2	59	84.8	41	63.6	77			2
1935	73.6	75	83	78	64.2	63			1
1934	74.3	55	84.2	49	64.3	60			1
1933	73.6	75	83.7	62	63.7	76	18.71	13	2
1932	73.5	81	83.8	57	63.2	89			1
1931	74.1	61	83.7	62	64.6	54			0
1930	74.5	47	85.8	18	63.3	84	5.92	116	0
1929	72	108	82.8	85	61.3	110	8.80	97	0
1928	73.6	75	82.6	92	64.6	54			1
1927	69.4	113	78.8	113	60.1	113	14.96	31	3
1926	71.7	110	81.2	109	62.3	104	14.95	33	0
1925	74.7	44	85.8	18	63.5	79	9.15	93	0
1924	71.7	110	81.4	106	61.9	107			0
1923	73.9	63	84.9	39	63	96	9.65	84	1
1922	73.6	75	83.3	71	64	69	13.18	48	0
1921	73.7	68	84.1	53	63.4	81	12.68	52	1
1920	72.1	107	81.3	108	63	96	17.56	18	0
1919	72.8	93	82.2	99	63.3	84	26.12	1	1
1918	73.3	85	83.8	57	62.7	99	7.80	106	0
1917	73.8	66	82.8	85	64.7	51	14.24	45	1
1916							11.96	59	92
1915							14.75	36	92
1914							13.25	47	92
1913							9.33	87	92
1912							10.40	76	92
1911							25.96	2	92
1910							16.95	23	92
1909							7.68	107	92
1907							11.54	63	92
1906							23.41	5	92
1905							13.17	49	92
1903							15.29	29	92
1902							9.73	82	92
1901							14.60	38	92
1900							12.98	51	92
1898							11.01	67	92
1897							16.90	24	92
1896	76.8	6	87.9	2	65.8	32	7.91	105	1
1895	77	3	88.4	1	65.5	37			0
1894	76.8	6	87.8	3	65.7	35	9.25	90	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2010	77.8
1973	77.3
2016	77
1895	77
2022	76.9
1896	76.8
1894	76.8
2020	76.7
2019	76.7
1993	76.7

Coldest
Year	Mean, °F
1927	69.4
1946	70.2
1926	71.7
1924	71.7
1950	72
1929	72
1920	72.1
1940	72.2
1962	72.3
1958	72.3
More years share the last value

Wettest
Year	Precipitation, in
1919	26.12
1911	25.96
1945	25.41
2023	23.53
1906	23.41
2013	22.93
1942	21.00
2011	20.92
2004	20.55
1938	20.55

Driest
Year	Precipitation, in
1966	5.21
1968	5.81
1930	5.92
1964	6.55
1962	6.70
1999	6.75
1995	6.99
1957	7.39
1965	7.50
1983	7.56

The hottest, coldest and wettest days

Hottest day: 103°F; 2 July 2026
Coldest night: 47°F; 2 June 2026
Wettest day: 2.59 in; 9 July 2026

Every month, season and year

Months

Seasons

Years

Wilmington, DE the day's answers

All-time records

Every answer in words

Summer 2026 brought 17.49 in of precipitation in Wilmington, DE, the wettest summer since 2023, 19th wettest of 118.
The hottest day of summer 2026 in Wilmington, DE: 103°F on Thursday 2 July 2026.
The coldest night of summer 2026 in Wilmington, DE: a low of 47°F on Tuesday 2 June 2026.
The wettest day of summer 2026 in Wilmington, DE: 2.59 in on Thursday 9 July 2026.