nomadseason

Monthly climate in Gretna, Virginia, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Gretna features a humid subtropical climate (Cfa).Temperatures typically range between 4 °C (40 °F) and 27 °C (81 °F) through the year, but rarely can drop to -14 °C (6 °F) or can rise to as high as 37 °C (99 °F).The average annual precipitation amounts to about 1168 mm (46.0 inches) and receives 121 rainy days on the 1 mm (0.04 inches) threshold annually.Gretna enjoys an average of 3149 hours of sunshine throughout the year, and daylight varies from 9 hours 39 minutes to 14 hours 38 minutes per day.

Monthly average temperatures in Gretna, Virginia, United States §

The warmest months in Gretna are June, July and August, with daily mean temperatures ranging from 24 to 27 °C (75 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 7 °C (40 - 45 °F) throughout the day. On average each year, Gretna experiences 129 days above 25 °C (77.0 °F) and 48 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Gretna, 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 23°C
(74°F)		 26°C
(79°F)		 29°C
(85°F)		 31°C
(88°F)		 35°C
(96°F)		 37°C
(98°F)		 37°C
(99°F)		 37°C
(98°F)		 37°C
(99°F)		 35°C
(96°F)		 27°C
(82°F)		 23°C
(73°F)
Mean maximum 20°C
(68°F)		 24°C
(75°F)		 26°C
(80°F)		 29°C
(85°F)		 33°C
(92°F)		 34°C
(94°F)		 36°C
(97°F)		 35°C
(96°F)		 34°C
(94°F)		 31°C
(88°F)		 25°C
(78°F)		 20°C
(68°F)
Average high 9°C
(49°F)		 13°C
(55°F)		 16°C
(61°F)		 21°C
(71°F)		 26°C
(78°F)		 29°C
(85°F)		 33°C
(91°F)		 31°C
(88°F)		 28°C
(83°F)		 23°C
(74°F)		 15°C
(59°F)		 12°C
(53°F)
Daily mean 4°C
(40°F)		 7°C
(45°F)		 10°C
(50°F)		 15°C
(60°F)		 20°C
(68°F)		 24°C
(75°F)		 27°C
(81°F)		 25°C
(78°F)		 23°C
(73°F)		 17°C
(63°F)		 9°C
(49°F)		 6°C
(44°F)
Average low 0°C
(33°F)		 2°C
(36°F)		 5°C
(41°F)		 10°C
(50°F)		 15°C
(59°F)		 19°C
(67°F)		 22°C
(72°F)		 21°C
(70°F)		 18°C
(65°F)		 12°C
(55°F)		 4°C
(39°F)		 2°C
(36°F)
Mean minimum -10°C
(15°F)		 -7°C
(20°F)		 -4°C
(25°F)		 0°C
(33°F)		 5°C
(42°F)		 14°C
(58°F)		 17°C
(63°F)		 16°C
(61°F)		 10°C
(51°F)		 4°C
(39°F)		 -4°C
(25°F)		 -7°C
(20°F)
Minimum -14°C
(6°F)		 -11°C
(12°F)		 -6°C
(21°F)		 -2°C
(30°F)		 2°C
(35°F)		 12°C
(54°F)		 15°C
(59°F)		 14°C
(57°F)		 7°C
(45°F)		 1°C
(34°F)		 -6°C
(22°F)		 -10°C
(15°F)

Compare climate in Gretna with other places

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

Monthly average precipitation in Gretna, Virginia, United States §

Gretna usually has the most precipitation in February, April and May, with an average of 11 rainy days and 120 mm (4.7 inches) of precipitation per month.The driest months in Gretna are January, March and July. On average, 69 mm (2.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Gretna, 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) 75 (2.9) 112 (4.4) 70 (2.8) 130 (5.1) 118 (4.6) 94 (3.7) 63 (2.5) 105 (4.1) 109 (4.3) 110 (4.3) 78 (3.1) 104 (4.1)
Average precipitation days (≥ 1 mm) 8 11 10 10 12 11 9 14 11 9 7 9

Monthly sunshine hours in Gretna, Virginia, United States §

The sunniest months in Gretna are June, July and August, when the sun shines an average of 10 hours 54 minutes a day.Least sunny months in Gretna: January, February and December receive an average of 5 hours 56 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Gretna, 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 157 187 258 282 297 323 359 321 278 260 228 196
Mean daily daylight hours 9h 56m 10h 50m 11h 59m 13h 9m 14h 9m 14h 38m 14h 22m 13h 29m 12h 22m 11h 11m 10h 10m 9h 39m

Solar UV radiation in Gretna, Virginia, United States §

Gretna experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme 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 5. For more detailed information, check out our hourly Gretna UV Index data.

Average daily maximum UV levels by month for Gretna, 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 6 7 9 10 11 10 10 9 7 5 3