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Monthly climate in Grasonville, Maryland, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Grasonville features a humid subtropical climate (Cfa).Temperatures typically range between 3 °C (37 °F) and 27 °C (80 °F) through the year, but rarely can drop to -12 °C (11 °F) or can rise to as high as 32 °C (90 °F).The average annual precipitation amounts to about 1414 mm (55.7 inches) and receives 127 rainy days on the 1 mm (0.04 inches) threshold annually.Grasonville enjoys an average of 3132 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 Grasonville, Maryland, United States §

The warmest months in Grasonville are June, July and August, with daily mean temperatures ranging from 23 to 27 °C (74 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 3 to 6 °C (37 - 42 °F) throughout the day. On average each year, Grasonville experiences 76 days above 25 °C (77.0 °F) and 24 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Grasonville, 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 15°C
(59°F)		 13°C
(56°F)		 19°C
(67°F)		 22°C
(71°F)		 26°C
(80°F)		 29°C
(85°F)		 32°C
(90°F)		 31°C
(89°F)		 30°C
(87°F)		 27°C
(81°F)		 21°C
(71°F)		 16°C
(60°F)
Mean maximum 12°C
(53°F)		 12°C
(54°F)		 16°C
(61°F)		 20°C
(68°F)		 25°C
(77°F)		 28°C
(83°F)		 31°C
(88°F)		 30°C
(87°F)		 28°C
(83°F)		 25°C
(77°F)		 19°C
(66°F)		 14°C
(57°F)
Average high 5°C
(41°F)		 6°C
(43°F)		 9°C
(49°F)		 15°C
(59°F)		 20°C
(68°F)		 25°C
(77°F)		 29°C
(84°F)		 27°C
(82°F)		 25°C
(77°F)		 20°C
(68°F)		 12°C
(54°F)		 8°C
(46°F)
Daily mean 3°C
(37°F)		 4°C
(39°F)		 7°C
(45°F)		 12°C
(54°F)		 18°C
(64°F)		 23°C
(74°F)		 27°C
(80°F)		 26°C
(79°F)		 23°C
(74°F)		 18°C
(65°F)		 10°C
(50°F)		 6°C
(42°F)
Average low 1°C
(34°F)		 2°C
(36°F)		 5°C
(41°F)		 10°C
(50°F)		 16°C
(60°F)		 21°C
(71°F)		 25°C
(77°F)		 24°C
(76°F)		 21°C
(70°F)		 16°C
(61°F)		 8°C
(46°F)		 4°C
(39°F)
Mean minimum -7°C
(20°F)		 -5°C
(23°F)		 -2°C
(29°F)		 4°C
(39°F)		 8°C
(47°F)		 16°C
(62°F)		 21°C
(71°F)		 20°C
(69°F)		 16°C
(61°F)		 10°C
(50°F)		 1°C
(34°F)		 -2°C
(28°F)
Minimum -12°C
(11°F)		 -11°C
(12°F)		 -5°C
(24°F)		 2°C
(35°F)		 4°C
(40°F)		 13°C
(56°F)		 20°C
(69°F)		 19°C
(66°F)		 13°C
(56°F)		 7°C
(45°F)		 -2°C
(28°F)		 -7°C
(20°F)

Compare climate in Grasonville with other places

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

Monthly average precipitation in Grasonville, Maryland, United States §

Grasonville usually has the most precipitation in May, July and October, with an average of 11 rainy days and 140 mm (5.5 inches) of precipitation per month.The driest months in Grasonville are January, June and November. On average, 86 mm (3.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Grasonville, 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) 79 (3.1) 136 (5.3) 106 (4.2) 112 (4.4) 139 (5.5) 83 (3.3) 143 (5.6) 136 (5.3) 118 (4.6) 138 (5.4) 96 (3.8) 130 (5.1)
Average precipitation days (≥ 1 mm) 8 13 11 11 12 11 11 12 10 10 8 10

Monthly sunshine hours in Grasonville, Maryland, United States §

The sunniest months in Grasonville are June, July and August, when the sun shines an average of 11 hours 10 minutes a day.Least sunny months in Grasonville: January, February and December receive an average of 5 hours 44 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Grasonville, 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 151 181 260 268 296 339 359 328 280 250 225 189
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 Grasonville, Maryland, United States §

Grasonville 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 Grasonville UV Index data.

Average daily maximum UV levels by month for Grasonville, 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 9 10 10 10 9 8 7 5 3