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Monthly climate in Dumfries, Virginia, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Dumfries features a humid subtropical climate (Cfa).Temperatures typically range between 3 °C (38 °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 39 °C (102 °F).The average annual precipitation amounts to about 1188 mm (46.8 inches) and receives 124 rainy days on the 1 mm (0.04 inches) threshold annually.Dumfries enjoys an average of 3147 hours of sunshine throughout the year, and daylight varies from 9 hours 30 minutes to 14 hours 48 minutes per day.

Monthly average temperatures in Dumfries, Virginia, United States §

The warmest months in Dumfries 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 3 to 6 °C (38 - 43 °F) throughout the day. On average each year, Dumfries experiences 118 days above 25 °C (77.0 °F) and 46 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Dumfries, 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)		 27°C
(80°F)		 29°C
(84°F)		 33°C
(92°F)		 35°C
(95°F)		 36°C
(97°F)		 39°C
(102°F)		 37°C
(99°F)		 37°C
(99°F)		 36°C
(96°F)		 26°C
(79°F)		 21°C
(69°F)
Mean maximum 19°C
(66°F)		 22°C
(73°F)		 26°C
(80°F)		 29°C
(85°F)		 33°C
(93°F)		 35°C
(96°F)		 37°C
(99°F)		 35°C
(96°F)		 34°C
(93°F)		 31°C
(88°F)		 25°C
(77°F)		 19°C
(67°F)
Average high 7°C
(46°F)		 11°C
(52°F)		 14°C
(57°F)		 20°C
(68°F)		 25°C
(77°F)		 29°C
(85°F)		 32°C
(91°F)		 30°C
(87°F)		 27°C
(81°F)		 22°C
(72°F)		 14°C
(58°F)		 10°C
(50°F)
Daily mean 3°C
(38°F)		 6°C
(43°F)		 9°C
(48°F)		 14°C
(58°F)		 20°C
(67°F)		 24°C
(76°F)		 27°C
(81°F)		 26°C
(78°F)		 23°C
(73°F)		 17°C
(63°F)		 9°C
(49°F)		 6°C
(42°F)
Average low -0°C
(32°F)		 1°C
(35°F)		 4°C
(40°F)		 10°C
(50°F)		 15°C
(59°F)		 20°C
(68°F)		 23°C
(74°F)		 22°C
(72°F)		 19°C
(66°F)		 13°C
(56°F)		 5°C
(41°F)		 2°C
(35°F)
Mean minimum -9°C
(16°F)		 -7°C
(19°F)		 -4°C
(26°F)		 2°C
(36°F)		 7°C
(44°F)		 15°C
(59°F)		 19°C
(66°F)		 17°C
(63°F)		 12°C
(53°F)		 5°C
(42°F)		 -3°C
(28°F)		 -5°C
(24°F)
Minimum -14°C
(7°F)		 -13°C
(10°F)		 -5°C
(23°F)		 -1°C
(31°F)		 3°C
(38°F)		 11°C
(53°F)		 17°C
(64°F)		 16°C
(61°F)		 8°C
(47°F)		 2°C
(36°F)		 -4°C
(25°F)		 -10°C
(15°F)

Compare climate in Dumfries with other places

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

Monthly average precipitation in Dumfries, Virginia, United States §

Dumfries usually has the most precipitation in May, August and October, with an average of 12 rainy days and 126 mm (5.0 inches) of precipitation per month.The driest months in Dumfries are January, March and November. On average, 73 mm (2.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Dumfries, 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) 61 (2.4) 93 (3.6) 79 (3.1) 101 (4.0) 117 (4.6) 108 (4.3) 108 (4.2) 153 (6.0) 93 (3.6) 109 (4.3) 78 (3.1) 89 (3.5)
Average precipitation days (≥ 1 mm) 7 12 9 10 12 13 10 15 11 9 7 9

Monthly sunshine hours in Dumfries, Virginia, United States §

The sunniest months in Dumfries are June, July and August, when the sun shines an average of 11 hours 2 minutes a day.Least sunny months in Dumfries: 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 Dumfries, 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 48m 10h 45m 11h 58m 13h 13m 14h 17m 14h 48m 14h 31m 13h 35m 12h 23m 11h 8m 10h 3m 9h 30m

Solar UV radiation in Dumfries, Virginia, United States §

Dumfries 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 Dumfries UV Index data.

Average daily maximum UV levels by month for Dumfries, 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