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Monthly climate in Dover, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Dover features a humid subtropical climate (Cfa).Temperatures typically range between 3 °C (38 °F) and 27 °C (80 °F) through the year, but rarely can drop to -15 °C (5 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 1310 mm (51.6 inches) and receives 129 rainy days on the 1 mm (0.04 inches) threshold annually.Dover enjoys an average of 3163 hours of sunshine throughout the year, and daylight varies from 9 hours 26 minutes to 14 hours 51 minutes per day.

Monthly average temperatures in Dover, United States §

The warmest months in Dover are June, July and August, with daily mean temperatures ranging from 24 to 27 °C (75 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 3 to 5 °C (38 - 42 °F) throughout the day. On average each year, Dover experiences 102 days above 25 °C (77.0 °F) and 47 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Dover, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 20°C
(68°F)		 25°C
(77°F)		 28°C
(83°F)		 31°C
(88°F)		 33°C
(92°F)		 34°C
(93°F)		 36°C
(97°F)		 34°C
(94°F)		 33°C
(92°F)		 34°C
(93°F)		 25°C
(77°F)		 20°C
(68°F)
Mean maximum 18°C
(64°F)		 20°C
(68°F)		 24°C
(76°F)		 28°C
(82°F)		 32°C
(90°F)		 33°C
(92°F)		 35°C
(95°F)		 34°C
(93°F)		 32°C
(89°F)		 29°C
(84°F)		 24°C
(75°F)		 18°C
(65°F)
Average high 7°C
(44°F)		 9°C
(49°F)		 12°C
(54°F)		 18°C
(64°F)		 23°C
(73°F)		 28°C
(82°F)		 30°C
(87°F)		 29°C
(85°F)		 26°C
(79°F)		 21°C
(70°F)		 14°C
(57°F)		 9°C
(48°F)
Daily mean 3°C
(38°F)		 5°C
(41°F)		 8°C
(46°F)		 13°C
(56°F)		 18°C
(65°F)		 24°C
(75°F)		 27°C
(80°F)		 25°C
(78°F)		 22°C
(72°F)		 17°C
(63°F)		 9°C
(49°F)		 5°C
(42°F)
Average low -1°C
(31°F)		 1°C
(34°F)		 4°C
(39°F)		 9°C
(49°F)		 14°C
(58°F)		 19°C
(67°F)		 23°C
(73°F)		 22°C
(72°F)		 19°C
(66°F)		 14°C
(57°F)		 5°C
(41°F)		 2°C
(35°F)
Mean minimum -10°C
(14°F)		 -8°C
(18°F)		 -4°C
(25°F)		 2°C
(36°F)		 7°C
(45°F)		 14°C
(58°F)		 18°C
(65°F)		 18°C
(64°F)		 12°C
(54°F)		 6°C
(43°F)		 -3°C
(26°F)		 -5°C
(22°F)
Minimum -15°C
(5°F)		 -14°C
(8°F)		 -7°C
(20°F)		 0°C
(32°F)		 3°C
(39°F)		 11°C
(52°F)		 16°C
(62°F)		 16°C
(62°F)		 9°C
(49°F)		 4°C
(39°F)		 -6°C
(21°F)		 -10°C
(15°F)

Compare climate in Dover with other places

Compare temperature, precipitation, sunshine, UV index in Dover, United States with other places around the world.

Monthly average precipitation in Dover, United States §

Dover usually has the most precipitation in May, July and August, with an average of 13 rainy days and 151 mm (6.0 inches) of precipitation per month.The driest months in Dover are January, April and November. On average, 77 mm (3.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Dover, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 59 (2.3) 99 (3.9) 105 (4.1) 96 (3.8) 127 (5.0) 106 (4.2) 144 (5.7) 183 (7.2) 96 (3.8) 121 (4.8) 78 (3.1) 97 (3.8)
Average precipitation days (≥ 1 mm) 8 11 11 11 12 11 13 16 11 9 7 9

Monthly sunshine hours in Dover, United States §

The sunniest months in Dover are June, July and August, when the sun shines an average of 11 hours 13 minutes a day.Least sunny months in Dover: January, February and December receive an average of 5 hours 48 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Dover, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 155 183 260 275 304 340 361 330 285 247 229 189
Mean daily daylight hours 9h 45m 10h 43m 11h 58m 13h 15m 14h 19m 14h 51m 14h 34m 13h 36m 12h 23m 11h 7m 10h 0m 9h 26m

Solar UV radiation in Dover, United States §

Dover experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 10 - 10, which corresponds to the Very High category of sun exposure.January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly Dover UV Index data.

Average daily maximum UV levels by month for Dover, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 5 7 9 10 10 10 9 8 7 4 3