Dover weather by month
What a typical year looks like in Dover, Pennsylvania: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Middletown Harrisburg Int'l Airport, 22 km from Dover; records cover 1888–2026.
The year at a glance
- Precipitation a year
- 44.2 in1123 mm
- Snow a year
- 30 in76 cm
- Last spring freeze
- Apr 8
- First fall freeze
- Nov 3
- Heating degree days
- 5,024
- Cooling degree days
- 1,172
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 9°−13° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Dover in January
Highs average 39°4° and lows 23°−5°, with 3 in77 mm of precipitation and 9 in23 cm of snow in a typical January.
- Record high
- 73°23° (1932)
- Record low
- −22°−30° (1994)
- Heating degree days
- 1060
- Cooling degree days
- 0
Dover in February
Highs average 42°6° and lows 25°−4°, with 2.6 in66 mm of precipitation and 9 in24 cm of snow in a typical February.
- Record high
- 79°26° (2018)
- Record low
- −13°−25° (1899)
- Heating degree days
- 886
- Cooling degree days
- 0
Dover in March
Highs average 51°11° and lows 32°0°, with 3.7 in94 mm of precipitation and 6 in14 cm of snow in a typical March.
- Record high
- 87°31° (1998)
- Record low
- −1°−18° (2015)
- Heating degree days
- 720
- Cooling degree days
- 1
Dover in April
Highs average 64°18° and lows 43°6°, with 3.6 in90 mm of precipitation and 0.4 in1 cm of snow in a typical April.
- Record high
- 93°34° (1915)
- Record low
- 11°−12° (1923)
- Heating degree days
- 364
- Cooling degree days
- 9
Dover in May
Highs average 74°23° and lows 53°12°, with 3.8 in97 mm of precipitation in a typical May.
- Record high
- 97°36° (1939)
- Record low
- 30°−1° (2020)
- Heating degree days
- 121
- Cooling degree days
- 72
Dover in June
Highs average 82°28° and lows 63°17°, with 4 in101 mm of precipitation in a typical June.
- Record high
- 100°38° (1934)
- Record low
- 40°4° (1980)
- Heating degree days
- 12
- Cooling degree days
- 239
Dover in July
Highs average 87°30° and lows 68°20°, with 4.7 in120 mm of precipitation in a typical July.
- Record high
- 107°42° (1966)
- Record low
- 49°9° (1945)
- Heating degree days
- 0
- Cooling degree days
- 381
Dover in August
Highs average 85°29° and lows 66°19°, with 3.8 in96 mm of precipitation in a typical August.
- Record high
- 104°40° (1918)
- Record low
- 45°7° (1976)
- Heating degree days
- 1
- Cooling degree days
- 319
Dover in September
Highs average 78°25° and lows 58°15°, with 4.8 in123 mm of precipitation in a typical September.
- Record high
- 102°39° (1953)
- Record low
- 30°−1° (1963)
- Heating degree days
- 48
- Cooling degree days
- 135
Dover in OctoberThis month
Highs average 66°19° and lows 46°8°, with 3.8 in97 mm of precipitation and 0.2 in0.5 cm of snow in a typical October.
- Record high
- 97°36° (1941)
- Record low
- 23°−5° (1969)
- Heating degree days
- 300
- Cooling degree days
- 16
Dover in November
Highs average 54°12° and lows 36°2°, with 3 in75 mm of precipitation and 0.8 in2 cm of snow in a typical November.
- Record high
- 84°29° (1950)
- Record low
- 10°−12° (1929)
- Heating degree days
- 605
- Cooling degree days
- 0
Dover in December
Highs average 43°6° and lows 28°−2°, with 3.4 in87 mm of precipitation and 4 in11 cm of snow in a typical December.
- Record high
- 75°24° (1984)
- Record low
- −8°−22° (1960)
- Heating degree days
- 907
- Cooling degree days
- 0