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Monthly climate in Dahlgren, Virginia, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Dahlgren features a humid subtropical climate (Cfa).Temperatures typically range between 4 °C (39 °F) and 27 °C (81 °F) through the year, but rarely can drop to -14 °C (7 °F) or can rise to as high as 38 °C (100 °F).The average annual precipitation amounts to about 1197 mm (47.1 inches) and receives 123 rainy days on the 1 mm (0.04 inches) threshold annually.Dahlgren enjoys an average of 3147 hours of sunshine throughout the year, and daylight varies from 9 hours 31 minutes to 14 hours 46 minutes per day.

Monthly average temperatures in Dahlgren, Virginia, United States §

The warmest months in Dahlgren are June, July and August, with daily mean temperatures ranging from 24 to 27 °C (76 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 6 °C (39 - 43 °F) throughout the day. On average each year, Dahlgren experiences 114 days above 25 °C (77.0 °F) and 34 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Dahlgren, Virginia, 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 21°C
(70°F)		 25°C
(77°F)		 28°C
(83°F)		 31°C
(88°F)		 34°C
(93°F)		 36°C
(96°F)		 38°C
(100°F)		 36°C
(96°F)		 36°C
(97°F)		 34°C
(94°F)		 26°C
(79°F)		 20°C
(68°F)
Mean maximum 18°C
(65°F)		 21°C
(71°F)		 26°C
(79°F)		 28°C
(83°F)		 32°C
(90°F)		 34°C
(93°F)		 36°C
(97°F)		 35°C
(95°F)		 33°C
(91°F)		 30°C
(86°F)		 24°C
(76°F)		 19°C
(66°F)
Average high 8°C
(46°F)		 11°C
(51°F)		 14°C
(57°F)		 19°C
(67°F)		 24°C
(76°F)		 29°C
(84°F)		 31°C
(89°F)		 30°C
(86°F)		 27°C
(81°F)		 22°C
(72°F)		 14°C
(58°F)		 10°C
(50°F)
Daily mean 4°C
(39°F)		 6°C
(43°F)		 9°C
(49°F)		 15°C
(59°F)		 20°C
(68°F)		 24°C
(76°F)		 27°C
(81°F)		 26°C
(79°F)		 23°C
(74°F)		 18°C
(64°F)		 10°C
(50°F)		 6°C
(43°F)
Average low 0°C
(33°F)		 2°C
(36°F)		 5°C
(42°F)		 11°C
(51°F)		 16°C
(61°F)		 21°C
(70°F)		 24°C
(75°F)		 23°C
(73°F)		 20°C
(68°F)		 14°C
(58°F)		 6°C
(43°F)		 3°C
(37°F)
Mean minimum -8°C
(17°F)		 -6°C
(22°F)		 -2°C
(28°F)		 3°C
(38°F)		 8°C
(46°F)		 16°C
(61°F)		 19°C
(67°F)		 18°C
(65°F)		 13°C
(56°F)		 7°C
(44°F)		 -1°C
(30°F)		 -4°C
(25°F)
Minimum -14°C
(7°F)		 -11°C
(13°F)		 -4°C
(25°F)		 1°C
(34°F)		 5°C
(40°F)		 13°C
(56°F)		 18°C
(65°F)		 16°C
(62°F)		 11°C
(52°F)		 4°C
(39°F)		 -3°C
(27°F)		 -9°C
(17°F)

Compare climate in Dahlgren with other places

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

Monthly average precipitation in Dahlgren, Virginia, United States §

Dahlgren usually has the most precipitation in May, July and August, with an average of 12 rainy days and 130 mm (5.1 inches) of precipitation per month.The driest months in Dahlgren are January, March and November. On average, 72 mm (2.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Dahlgren, Virginia, 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) 62 (2.4) 93 (3.6) 75 (2.9) 99 (3.9) 115 (4.5) 110 (4.3) 118 (4.6) 157 (6.2) 92 (3.6) 110 (4.3) 80 (3.1) 88 (3.5)
Average precipitation days (≥ 1 mm) 8 12 9 10 11 12 11 15 10 9 7 9

Monthly sunshine hours in Dahlgren, Virginia, United States §

The sunniest months in Dahlgren are June, July and August, when the sun shines an average of 11 hours 2 minutes a day.Least sunny months in Dahlgren: January, February and December receive an average of 5 hours 53 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Dahlgren, Virginia, 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 158 184 261 271 298 335 357 322 279 255 228 193
Mean daily daylight hours 9h 49m 10h 46m 11h 58m 13h 13m 14h 15m 14h 46m 14h 29m 13h 34m 12h 22m 11h 8m 10h 4m 9h 31m

Solar UV radiation in Dahlgren, Virginia, United States §

Dahlgren 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, February and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Dahlgren UV Index data.

Average daily maximum UV levels by month for Dahlgren, Virginia, 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 5 3