Dover weather by month
What a typical year looks like in Dover, Delaware: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at DOVER, 2 km from Dover; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 47.6 in1209 mm
- Snow a year
- 13 in34 cm
- Last spring freeze
- Apr 2
- First fall freeze
- Nov 4
- Heating degree days
- 4,195
- Cooling degree days
- 1,334
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 13°−11° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Dover in January
Highs average 44°7° and lows 28°−2°, with 3.4 in87 mm of precipitation and 4 in10 cm of snow in a typical January.
- Record high
- 77°25° (1907)
- Record low
- −7°−22° (1935)
- Heating degree days
- 899
- Cooling degree days
- 0
Dover in February
Highs average 47°9° and lows 29°−2°, with 3.1 in78 mm of precipitation and 6 in15 cm of snow in a typical February.
- Record high
- 80°27° (1930)
- Record low
- −11°−24° (1934)
- Heating degree days
- 750
- Cooling degree days
- 0
Dover in March
Highs average 55°13° and lows 35°2°, with 4.2 in107 mm of precipitation and 0.6 in1.5 cm of snow in a typical March.
- Record high
- 88°31° (1921)
- Record low
- 7°−14° (1914)
- Heating degree days
- 623
- Cooling degree days
- 2
Dover in April
Highs average 66°19° and lows 45°7°, with 3.7 in94 mm of precipitation in a typical April.
- Record high
- 97°36° (1990)
- Record low
- 14°−10° (1923)
- Heating degree days
- 307
- Cooling degree days
- 21
Dover in May
Highs average 74°24° and lows 54°12°, with 3.9 in99 mm of precipitation in a typical May.
- Record high
- 98°37° (1914)
- Record low
- 28°−2° (1923)
- Heating degree days
- 107
- Cooling degree days
- 89
Dover in June
Highs average 83°28° and lows 64°18°, with 4.6 in116 mm of precipitation in a typical June.
- Record high
- 101°38° (1914)
- Record low
- 41°5° (1938)
- Heating degree days
- 12
- Cooling degree days
- 259
Dover in July
Highs average 87°31° and lows 69°21°, with 4.1 in105 mm of precipitation in a typical July.
- Record high
- 104°40° (1930)
- Record low
- 45°7° (1963)
- Heating degree days
- 0
- Cooling degree days
- 401
Dover in August
Highs average 85°30° and lows 67°20°, with 4.9 in125 mm of precipitation in a typical August.
- Record high
- 102°39° (1977)
- Record low
- 35°2° (1924)
- Heating degree days
- 0
- Cooling degree days
- 347
Dover in September
Highs average 79°26° and lows 61°16°, with 4.3 in108 mm of precipitation in a typical September.
- Record high
- 99°37° (1953)
- Record low
- 30°−1° (1924)
- Heating degree days
- 26
- Cooling degree days
- 179
Dover in OctoberThis month
Highs average 69°21° and lows 50°10°, with 4.1 in103 mm of precipitation in a typical October.
- Record high
- 95°35° (1941)
- Record low
- 25°−4° (1909)
- Heating degree days
- 214
- Cooling degree days
- 34
Dover in November
Highs average 58°14° and lows 39°4°, with 3.4 in85 mm of precipitation in a typical November.
- Record high
- 85°29° (1950)
- Record low
- 11°−12° (1938)
- Heating degree days
- 493
- Cooling degree days
- 2
Dover in December
Highs average 49°9° and lows 32°0°, with 4 in101 mm of precipitation and 2.6 in6.6 cm of snow in a typical December.
- Record high
- 75°24° (1966)
- Record low
- −3°−19° (1942)
- Heating degree days
- 764
- Cooling degree days
- 0