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Monthly climate in Dedham, Maine, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Dedham features a humid continental climate (Dfb).Temperatures typically range between -5 °C (23 °F) and 21 °C (69 °F) through the year, but rarely can drop to -29 °C (-19 °F) or can rise to as high as 35 °C (95 °F).The average annual precipitation amounts to about 1131 mm (44.5 inches) and receives 123 rainy days on the 1 mm (0.04 inches) threshold annually.Dedham enjoys an average of 2928 hours of sunshine throughout the year, and daylight varies from 8 hours 50 minutes to 15 hours 30 minutes per day.

Monthly average temperatures in Dedham, Maine, United States §

The warmest months in Dedham 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 -5 to -3 °C (23 - 27 °F) throughout the day. On average each year, Dedham experiences 51 days above 25 °C (77.0 °F) and 131 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Dedham, 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)		 18°C
(65°F)		 18°C
(65°F)		 25°C
(77°F)		 34°C
(93°F)		 35°C
(95°F)		 35°C
(95°F)		 35°C
(95°F)		 32°C
(89°F)		 25°C
(78°F)		 23°C
(73°F)		 15°C
(60°F)
Mean maximum 10°C
(50°F)		 12°C
(54°F)		 13°C
(56°F)		 20°C
(68°F)		 30°C
(86°F)		 30°C
(87°F)		 33°C
(92°F)		 33°C
(91°F)		 29°C
(85°F)		 23°C
(74°F)		 18°C
(65°F)		 14°C
(57°F)
Average high -1°C
(30°F)		 0°C
(33°F)		 4°C
(40°F)		 11°C
(52°F)		 18°C
(64°F)		 23°C
(74°F)		 26°C
(79°F)		 26°C
(79°F)		 22°C
(71°F)		 15°C
(59°F)		 7°C
(45°F)		 1°C
(34°F)
Daily mean -5°C
(23°F)		 -4°C
(24°F)		 -1°C
(31°F)		 6°C
(43°F)		 12°C
(54°F)		 18°C
(64°F)		 21°C
(69°F)		 20°C
(69°F)		 16°C
(62°F)		 10°C
(50°F)		 3°C
(37°F)		 -3°C
(27°F)
Average low -10°C
(14°F)		 -10°C
(15°F)		 -5°C
(23°F)		 2°C
(35°F)		 6°C
(44°F)		 12°C
(53°F)		 15°C
(60°F)		 15°C
(60°F)		 11°C
(53°F)		 6°C
(43°F)		 -1°C
(30°F)		 -7°C
(19°F)
Mean minimum -22°C
(-7°F)		 -22°C
(-7°F)		 -18°C
(1°F)		 -5°C
(24°F)		 1°C
(34°F)		 6°C
(43°F)		 10°C
(51°F)		 9°C
(49°F)		 4°C
(39°F)		 -1°C
(31°F)		 -11°C
(12°F)		 -18°C
(-0°F)
Minimum -29°C
(-19°F)		 -25°C
(-13°F)		 -21°C
(-5°F)		 -7°C
(20°F)		 -1°C
(31°F)		 2°C
(36°F)		 8°C
(48°F)		 8°C
(46°F)		 1°C
(34°F)		 -4°C
(25°F)		 -17°C
(2°F)		 -25°C
(-12°F)

Compare climate in Dedham with other places

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

Monthly average precipitation in Dedham, Maine, United States §

Dedham usually has the most precipitation in April, November and December, with an average of 12 rainy days and 120 mm (4.7 inches) of precipitation per month.The driest months in Dedham are March, August and September. On average, 71 mm (2.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Dedham, 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) 90 (3.5) 82 (3.2) 70 (2.7) 124 (4.9) 93 (3.7) 84 (3.3) 93 (3.7) 71 (2.8) 72 (2.8) 115 (4.5) 116 (4.6) 119 (4.7)
Average precipitation days (≥ 1 mm) 8 10 9 13 10 11 10 10 7 12 12 11

Monthly sunshine hours in Dedham, Maine, United States §

The sunniest months in Dedham are June, July and August, when the sun shines an average of 10 hours 30 minutes a day.Least sunny months in Dedham: January, November and December receive an average of 5 hours 22 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Dedham, 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 144 188 254 240 289 320 321 324 283 212 178 171
Mean daily daylight hours 9h 13m 10h 25m 11h 57m 13h 31m 14h 50m 15h 30m 15h 9m 13h 57m 12h 27m 10h 54m 9h 32m 8h 50m

Solar UV radiation in Dedham, Maine, United States §

Dedham 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 Dedham UV Index data.

Average daily maximum UV levels by month for Dedham, 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