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Monthly climate in Grantsville, Maryland, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Grantsville features a oceanic climate (Cfb).Temperatures typically range between -2 °C (29 °F) and 22 °C (71 °F) through the year, but rarely can drop to -27 °C (-16 °F) or can rise to as high as 32 °C (89 °F).The average annual precipitation amounts to about 1421 mm (56.0 inches) and receives 177 rainy days on the 1 mm (0.04 inches) threshold annually.Grantsville enjoys an average of 2891 hours of sunshine throughout the year, and daylight varies from 9 hours 23 minutes to 14 hours 55 minutes per day.

Monthly average temperatures in Grantsville, Maryland, United States §

The warmest months in Grantsville are June, July and August, with daily mean temperatures ranging from 19 to 22 °C (67 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -2 to 1 °C (29 - 34 °F) throughout the day. On average each year, Grantsville experiences 54 days above 25 °C (77.0 °F) and 105 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, Maryland, 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 19°C
(66°F)		 23°C
(73°F)		 22°C
(72°F)		 27°C
(81°F)		 28°C
(83°F)		 30°C
(86°F)		 31°C
(88°F)		 32°C
(89°F)		 30°C
(86°F)		 29°C
(84°F)		 23°C
(74°F)		 18°C
(65°F)
Mean maximum 15°C
(59°F)		 18°C
(64°F)		 20°C
(69°F)		 25°C
(78°F)		 27°C
(82°F)		 29°C
(84°F)		 30°C
(86°F)		 30°C
(86°F)		 29°C
(84°F)		 26°C
(80°F)		 20°C
(69°F)		 15°C
(60°F)
Average high 2°C
(36°F)		 5°C
(42°F)		 9°C
(48°F)		 14°C
(58°F)		 20°C
(67°F)		 23°C
(74°F)		 26°C
(79°F)		 25°C
(78°F)		 23°C
(73°F)		 17°C
(63°F)		 9°C
(48°F)		 5°C
(41°F)
Daily mean -2°C
(29°F)		 1°C
(33°F)		 4°C
(39°F)		 9°C
(49°F)		 15°C
(59°F)		 19°C
(67°F)		 22°C
(71°F)		 21°C
(70°F)		 18°C
(64°F)		 12°C
(54°F)		 4°C
(40°F)		 1°C
(34°F)
Average low -6°C
(22°F)		 -4°C
(26°F)		 -1°C
(31°F)		 4°C
(40°F)		 11°C
(51°F)		 15°C
(59°F)		 17°C
(64°F)		 17°C
(62°F)		 13°C
(57°F)		 8°C
(47°F)		 -0°C
(32°F)		 -3°C
(27°F)
Mean minimum -19°C
(-2°F)		 -17°C
(2°F)		 -12°C
(11°F)		 -4°C
(24°F)		 0°C
(33°F)		 8°C
(47°F)		 12°C
(54°F)		 11°C
(52°F)		 6°C
(43°F)		 0°C
(32°F)		 -8°C
(19°F)		 -13°C
(9°F)
Minimum -27°C
(-16°F)		 -24°C
(-11°F)		 -15°C
(5°F)		 -7°C
(19°F)		 -4°C
(25°F)		 4°C
(39°F)		 11°C
(53°F)		 10°C
(50°F)		 2°C
(37°F)		 -2°C
(28°F)		 -11°C
(12°F)		 -20°C
(-4°F)

Compare climate in Grantsville with other places

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

Monthly average precipitation in Grantsville, Maryland, United States §

Grantsville usually has the most precipitation in April, May and June, with an average of 16 rainy days and 147 mm (5.8 inches) of precipitation per month.The driest months in Grantsville are January, August and November. On average, 90 mm (3.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Grantsville, Maryland, 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) 88 (3.5) 132 (5.2) 115 (4.5) 137 (5.4) 155 (6.1) 150 (5.9) 105 (4.1) 99 (3.9) 119 (4.7) 115 (4.5) 85 (3.3) 121 (4.8)
Average precipitation days (≥ 1 mm) 14 17 15 16 18 16 15 15 11 13 12 15

Monthly sunshine hours in Grantsville, Maryland, United States §

The sunniest months in Grantsville are June, July and August, when the sun shines an average of 10 hours 30 minutes a day.Least sunny months in Grantsville: January, February and December receive an average of 4 hours 51 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Grantsville, Maryland, 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 123 154 242 244 273 305 347 313 283 239 198 164
Mean daily daylight hours 9h 42m 10h 42m 11h 58m 13h 16m 14h 22m 14h 55m 14h 37m 13h 38m 12h 23m 11h 6m 9h 58m 9h 23m

Solar UV radiation in Grantsville, Maryland, United States §

Grantsville experiences the highest level of ultraviolet (UV) radiation in April, May and August, 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, Maryland, 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 10 10 10 10 10 8 7 5 3