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Monthly climate in Chester, Maine, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Chester features a humid continental climate (Dfb).Temperatures typically range between -7 °C (19 °F) and 21 °C (69 °F) through the year, but rarely can drop to -31 °C (-23 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 1162 mm (45.7 inches) and receives 120 rainy days on the 1 mm (0.04 inches) threshold annually.Chester enjoys an average of 2806 hours of sunshine throughout the year, and daylight varies from 8 hours 44 minutes to 15 hours 37 minutes per day.

Monthly average temperatures in Chester, Maine, United States §

The warmest months in Chester are June, July and August, with daily mean temperatures ranging from 18 to 21 °C (64 - 69 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -7 to -5 °C (19 - 24 °F) throughout the day. On average each year, Chester experiences 51 days above 25 °C (77.0 °F) and 142 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Chester, Maine, 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 12°C
(54°F)		 13°C
(55°F)		 20°C
(69°F)		 24°C
(75°F)		 33°C
(92°F)		 36°C
(97°F)		 35°C
(96°F)		 34°C
(93°F)		 33°C
(92°F)		 25°C
(78°F)		 23°C
(74°F)		 15°C
(60°F)
Mean maximum 8°C
(47°F)		 9°C
(49°F)		 12°C
(54°F)		 20°C
(68°F)		 30°C
(86°F)		 30°C
(87°F)		 32°C
(90°F)		 33°C
(92°F)		 29°C
(84°F)		 23°C
(73°F)		 18°C
(64°F)		 13°C
(55°F)
Average high -3°C
(27°F)		 -1°C
(30°F)		 3°C
(37°F)		 10°C
(51°F)		 18°C
(65°F)		 24°C
(75°F)		 26°C
(80°F)		 26°C
(79°F)		 21°C
(71°F)		 14°C
(58°F)		 6°C
(43°F)		 -1°C
(31°F)
Daily mean -7°C
(19°F)		 -6°C
(21°F)		 -2°C
(29°F)		 5°C
(42°F)		 12°C
(54°F)		 18°C
(64°F)		 21°C
(69°F)		 20°C
(68°F)		 16°C
(61°F)		 9°C
(49°F)		 2°C
(35°F)		 -5°C
(24°F)
Average low -12°C
(10°F)		 -12°C
(11°F)		 -7°C
(20°F)		 1°C
(34°F)		 6°C
(43°F)		 11°C
(53°F)		 15°C
(59°F)		 15°C
(59°F)		 11°C
(51°F)		 5°C
(41°F)		 -2°C
(28°F)		 -9°C
(16°F)
Mean minimum -24°C
(-10°F)		 -23°C
(-8°F)		 -19°C
(-2°F)		 -6°C
(21°F)		 0°C
(32°F)		 5°C
(41°F)		 9°C
(49°F)		 8°C
(47°F)		 3°C
(37°F)		 -2°C
(29°F)		 -11°C
(12°F)		 -20°C
(-4°F)
Minimum -31°C
(-23°F)		 -27°C
(-16°F)		 -24°C
(-11°F)		 -11°C
(12°F)		 -1°C
(30°F)		 2°C
(35°F)		 8°C
(47°F)		 7°C
(44°F)		 -2°C
(29°F)		 -6°C
(22°F)		 -17°C
(1°F)		 -26°C
(-14°F)

Compare climate in Chester with other places

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

Monthly average precipitation in Chester, Maine, United States §

Chester usually has the most precipitation in April, October and November, with an average of 11 rainy days and 119 mm (4.7 inches) of precipitation per month.The driest months in Chester are March, June and August. On average, 80 mm (3.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Chester, Maine, 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) 93 (3.7) 84 (3.3) 75 (3.0) 120 (4.7) 99 (3.9) 83 (3.2) 94 (3.7) 82 (3.2) 83 (3.3) 120 (4.7) 116 (4.6) 113 (4.5)
Average precipitation days (≥ 1 mm) 9 11 9 13 11 10 11 9 8 9 11 9

Monthly sunshine hours in Chester, Maine, United States §

The sunniest months in Chester are June, July and August, when the sun shines an average of 10 hours 21 minutes a day.Least sunny months in Chester: January, November and December receive an average of 5 hours 1 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Chester, Maine, 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 131 184 240 223 277 313 321 317 271 194 168 162
Mean daily daylight hours 9h 8m 10h 23m 11h 57m 13h 33m 14h 55m 15h 37m 15h 14m 14h 1m 12h 28m 10h 52m 9h 28m 8h 44m

Solar UV radiation in Chester, Maine, United States §

Chester experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 8 - 10, which corresponds to the Very High category of sun exposure.January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Chester UV Index data.

Average daily maximum UV levels by month for Chester, Maine, 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) 2 4 5 7 9 10 8 8 7 5 3 2