As of 11:36 EDT

Wilmington, DE weather in September

88°

Wilmington, Sunday, 9 August, 11:36

Partly cloudy. Feels like 100°. High 88°, low 72°.

Pressure30.00 inHg

Wind4 mph SW

Humidity71%

Visibility6.2 mi

Dew point77°

See detailed hourly forecast

In September, Wilmington, DE averages a high of 76.5° and a low of 61.5°. About 4.0 inches of precipitation fall over the month (9 wet days). The record high is 97.2° (2023) and the record low 41.4° (1963). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	80.6°	65.5°	30%	92.3° (2010)	56.5° (1967)
2	80.6°	65.1°	35%	93.4° (1980)	53.8° (1970)
3	81°	65.1°	35%	93.4° (2023)	50.2° (1967)
4	81°	65.5°	25%	96.1° (2023)	52.5° (2024)
5	80.2°	65.1°	32%	97.2° (2023)	53.4° (1994)
6	79.5°	64.6°	30%	96.8° (2023)	52.3° (1994)
7	80.2°	63.9°	28%	90.5° (1998)	48.9° (1984)
8	79.3°	63.7°	28%	91.6° (1985)	51.6° (2024)
9	78.6°	63.5°	28%	89.8° (2016)	51.1° (1986)
10	78.6°	63.9°	30%	92.5° (1983)	50.7° (1975)
11	78.1°	62.8°	22%	94.6° (1983)	52.3° (1972)
12	77.7°	62.2°	25%	89.8° (1961)	49.1° (1967)
13	78.3°	62.2°	28%	89.1° (2005)	49.3° (1967)
14	77.9°	62.8°	33%	89.4° (2008)	48.7° (1985)
15	76.3°	61.5°	30%	89.1° (1970)	46° (1975)
16	75.9°	60.4°	30%	91.6° (1970)	48.7° (1984)
17	75.9°	61°	32%	90.7° (1991)	47.5° (1986)
18	76.1°	61°	35%	87.1° (1965)	45.9° (1990)
19	75.4°	59.7°	28%	89.1° (1983)	48.9° (1984)
20	75.4°	59.9°	20%	86.7° (1983)	47.7° (1979)
21	75.6°	60.1°	25%	87.1° (1965)	44.2° (1962)
22	74.8°	60.1°	37%	91° (1970)	45.3° (2020)
23	73.6°	59.2°	33%	93° (1970)	46.9° (1963)
24	72.7°	57.7°	27%	91.4° (1970)	41.4° (1963)
25	72.3°	57.9°	28%	90.1° (1970)	45° (1983)
26	73.6°	58.6°	43%	89.4° (1970)	47.3° (1963)
27	73.9°	59°	40%	89.1° (1998)	45.5° (2000)
28	72.9°	59°	45%	83.8° (2019)	42.8° (1989)
29	70.7°	57.6°	30%	83.3° (2019)	46° (2000)
30	69.6°	55.6°	30%	86.2° (1986)	43.5° (2000)