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Monthly climate in Grantsville, West Virginia, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Grantsville features a humid subtropical climate (Cfa). Temperatures typically range between 2 °C (35 °F) and 24 °C (76 °F) through the year, but rarely can drop to -19 °C (-2 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 1504 mm (59.2 inches) and receives 157 rainy days on the 1 mm (0.04 inches) threshold annually. Grantsville enjoys an average of 2854 hours of sunshine throughout the year, and daylight varies from 9 hours 28 minutes to 14 hours 50 minutes per day.

Monthly average temperatures in Grantsville, West Virginia, United States §

The warmest months in Grantsville are June, July and August, with daily mean temperatures ranging from 22 to 24 °C (72 - 76 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 4 °C (35 - 40 °F) throughout the day. On average each year, Grantsville experiences 106 days above 25 °C (77.0 °F) and 71 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Grantsville, West 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
(73°F)		 27°C
(81°F)		 28°C
(83°F)		 30°C
(86°F)		 32°C
(89°F)		 33°C
(92°F)		 34°C
(94°F)		 34°C
(93°F)		 36°C
(97°F)		 34°C
(94°F)		 27°C
(80°F)		 20°C
(69°F)
Mean maximum 18°C
(64°F)		 22°C
(72°F)		 26°C
(78°F)		 28°C
(83°F)		 31°C
(88°F)		 32°C
(90°F)		 33°C
(91°F)		 32°C
(90°F)		 32°C
(90°F)		 30°C
(86°F)		 24°C
(76°F)		 19°C
(66°F)
Average high 6°C
(42°F)		 9°C
(49°F)		 13°C
(56°F)		 18°C
(65°F)		 23°C
(74°F)		 27°C
(80°F)		 29°C
(85°F)		 28°C
(83°F)		 26°C
(80°F)		 21°C
(70°F)		 12°C
(54°F)		 8°C
(48°F)
Daily mean 2°C
(35°F)		 4°C
(40°F)		 8°C
(46°F)		 13°C
(55°F)		 18°C
(65°F)		 22°C
(72°F)		 24°C
(76°F)		 23°C
(74°F)		 21°C
(70°F)		 15°C
(60°F)		 7°C
(45°F)		 4°C
(40°F)
Average low -2°C
(29°F)		 0°C
(32°F)		 3°C
(37°F)		 7°C
(46°F)		 14°C
(57°F)		 17°C
(63°F)		 20°C
(68°F)		 19°C
(66°F)		 16°C
(61°F)		 11°C
(51°F)		 3°C
(37°F)		 0°C
(33°F)
Mean minimum -14°C
(6°F)		 -12°C
(11°F)		 -8°C
(19°F)		 -2°C
(29°F)		 3°C
(39°F)		 11°C
(51°F)		 15°C
(59°F)		 14°C
(57°F)		 9°C
(48°F)		 2°C
(36°F)		 -5°C
(23°F)		 -9°C
(17°F)
Minimum -19°C
(-2°F)		 -17°C
(1°F)		 -13°C
(8°F)		 -4°C
(25°F)		 0°C
(33°F)		 7°C
(45°F)		 13°C
(56°F)		 13°C
(55°F)		 5°C
(41°F)		 -1°C
(31°F)		 -9°C
(17°F)		 -14°C
(7°F)

Compare climate in Grantsville with other places

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

Monthly average precipitation in Grantsville, West Virginia, United States §

Grantsville usually has the most precipitation in April, May and June, with an average of 16 rainy days and 158 mm (6.2 inches) of precipitation per month. The driest months in Grantsville are January, September and November. On average, 95 mm (3.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Grantsville, West 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) 98 (3.9) 142 (5.6) 115 (4.5) 142 (5.6) 160 (6.3) 172 (6.8) 129 (5.1) 120 (4.7) 106 (4.2) 116 (4.6) 81 (3.2) 122 (4.8)
Average precipitation days (≥ 1 mm) 11 15 13 14 18 16 13 15 9 11 10 12

Monthly sunshine hours in Grantsville, West Virginia, United States §

The sunniest months in Grantsville are June, July and August, when the sun shines an average of 10 hours 34 minutes a day. Least sunny months in Grantsville: January, February and December receive an average of 4 hours 23 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Grantsville, West 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 110 140 236 240 287 310 347 314 283 239 192 148
Mean daily daylight hours 9h 46m 10h 44m 11h 58m 13h 14m 14h 18m 14h 50m 14h 33m 13h 36m 12h 23m 11h 7m 10h 1m 9h 28m

Solar UV radiation in Grantsville, West Virginia, United States §

Grantsville 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 Grantsville UV Index data.

Average daily maximum UV levels by month for Grantsville, West 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

Detailed Monthly Weather Insights for Grantsville, West Virginia, United States

Discover in-depth weather details for every month in Grantsville. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Grantsville's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.