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Monthly climate in Preston, Maryland, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Preston 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 -15 °C (5 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 1292 mm (50.8 inches) and receives 128 rainy days on the 1 mm (0.04 inches) threshold annually.Preston enjoys an average of 3170 hours of sunshine throughout the year, and daylight varies from 9 hours 29 minutes to 14 hours 48 minutes per day.

Monthly average temperatures in Preston, Maryland, United States §

The warmest months in Preston 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 3 to 6 °C (38 - 43 °F) throughout the day. On average each year, Preston experiences 104 days above 25 °C (77.0 °F) and 38 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Preston, 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 18°C
(65°F)		 23°C
(73°F)		 27°C
(81°F)		 29°C
(85°F)		 32°C
(90°F)		 33°C
(91°F)		 36°C
(97°F)		 34°C
(93°F)		 33°C
(91°F)		 33°C
(91°F)		 24°C
(76°F)		 19°C
(66°F)
Mean maximum 16°C
(62°F)		 18°C
(65°F)		 23°C
(74°F)		 26°C
(80°F)		 31°C
(88°F)		 32°C
(90°F)		 34°C
(94°F)		 33°C
(92°F)		 31°C
(89°F)		 28°C
(84°F)		 23°C
(73°F)		 17°C
(64°F)
Average high 7°C
(44°F)		 9°C
(49°F)		 12°C
(54°F)		 18°C
(64°F)		 23°C
(73°F)		 27°C
(82°F)		 30°C
(87°F)		 29°C
(84°F)		 26°C
(80°F)		 21°C
(71°F)		 14°C
(57°F)		 9°C
(49°F)
Daily mean 3°C
(38°F)		 5°C
(42°F)		 8°C
(47°F)		 14°C
(57°F)		 19°C
(66°F)		 24°C
(75°F)		 27°C
(81°F)		 26°C
(79°F)		 23°C
(73°F)		 18°C
(64°F)		 10°C
(50°F)		 6°C
(43°F)
Average low 0°C
(33°F)		 2°C
(35°F)		 5°C
(40°F)		 10°C
(50°F)		 15°C
(60°F)		 20°C
(69°F)		 24°C
(75°F)		 23°C
(73°F)		 20°C
(68°F)		 14°C
(58°F)		 6°C
(43°F)		 3°C
(37°F)
Mean minimum -9°C
(16°F)		 -7°C
(20°F)		 -3°C
(26°F)		 3°C
(37°F)		 8°C
(46°F)		 15°C
(59°F)		 19°C
(66°F)		 18°C
(65°F)		 13°C
(56°F)		 7°C
(45°F)		 -2°C
(28°F)		 -5°C
(24°F)
Minimum -15°C
(5°F)		 -12°C
(11°F)		 -6°C
(22°F)		 0°C
(33°F)		 4°C
(40°F)		 12°C
(54°F)		 17°C
(62°F)		 17°C
(63°F)		 10°C
(51°F)		 4°C
(39°F)		 -4°C
(24°F)		 -9°C
(17°F)

Compare climate in Preston with other places

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

Monthly average precipitation in Preston, Maryland, United States §

Preston usually has the most precipitation in May, July and August, with an average of 12 rainy days and 146 mm (5.8 inches) of precipitation per month.The driest months in Preston are January, April and November. On average, 79 mm (3.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Preston, 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) 65 (2.6) 103 (4.1) 89 (3.5) 89 (3.5) 125 (4.9) 97 (3.8) 152 (6.0) 161 (6.3) 105 (4.1) 123 (4.8) 82 (3.2) 100 (3.9)
Average precipitation days (≥ 1 mm) 8 13 10 11 12 12 11 15 10 8 8 10

Monthly sunshine hours in Preston, Maryland, United States §

The sunniest months in Preston are June, July and August, when the sun shines an average of 11 hours 15 minutes a day.Least sunny months in Preston: January, February and December receive an average of 5 hours 45 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Preston, 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 155 182 262 275 307 340 362 331 284 252 227 186
Mean daily daylight hours 9h 47m 10h 45m 11h 58m 13h 14m 14h 17m 14h 48m 14h 31m 13h 35m 12h 23m 11h 8m 10h 2m 9h 29m

Solar UV radiation in Preston, Maryland, United States §

Preston experiences the highest level of ultraviolet (UV) radiation in May, July 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 Preston UV Index data.

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