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Monthly climate in Monticello, Maine, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Monticello features a humid continental climate (Dfb). Temperatures typically range between -9 °C (16 °F) and 20 °C (68 °F) through the year, but rarely can drop to -31 °C (-24 °F) or can rise to as high as 36 °C (96 °F). The average annual precipitation amounts to about 1201 mm (47.3 inches) and receives 131 rainy days on the 1 mm (0.04 inches) threshold annually. Monticello enjoys an average of 2692 hours of sunshine throughout the year, and daylight varies from 8 hours 40 minutes to 15 hours 41 minutes per day.

Monthly average temperatures in Monticello, Maine, United States §

The warmest months in Monticello are June, July and August, with daily mean temperatures ranging from 16 to 20 °C (62 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -9 to -6 °C (16 - 21 °F) throughout the day. On average each year, Monticello experiences 38 days above 25 °C (77.0 °F) and 156 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Monticello, 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 11°C
(53°F)		 9°C
(49°F)		 15°C
(60°F)		 21°C
(70°F)		 32°C
(90°F)		 36°C
(96°F)		 34°C
(94°F)		 33°C
(92°F)		 32°C
(90°F)		 24°C
(76°F)		 23°C
(74°F)		 15°C
(59°F)
Mean maximum 7°C
(44°F)		 7°C
(46°F)		 10°C
(50°F)		 18°C
(65°F)		 29°C
(85°F)		 29°C
(85°F)		 31°C
(88°F)		 31°C
(88°F)		 28°C
(83°F)		 21°C
(71°F)		 17°C
(63°F)		 11°C
(52°F)
Average high -4°C
(25°F)		 -3°C
(27°F)		 1°C
(35°F)		 9°C
(48°F)		 17°C
(63°F)		 22°C
(72°F)		 25°C
(78°F)		 25°C
(77°F)		 20°C
(69°F)		 13°C
(55°F)		 5°C
(41°F)		 -2°C
(29°F)
Daily mean -9°C
(16°F)		 -8°C
(18°F)		 -3°C
(26°F)		 4°C
(40°F)		 11°C
(52°F)		 16°C
(62°F)		 20°C
(68°F)		 19°C
(66°F)		 14°C
(58°F)		 8°C
(47°F)		 0°C
(33°F)		 -6°C
(21°F)
Average low -13°C
(8°F)		 -13°C
(9°F)		 -8°C
(18°F)		 -0°C
(31°F)		 5°C
(41°F)		 10°C
(51°F)		 14°C
(57°F)		 13°C
(56°F)		 9°C
(48°F)		 3°C
(39°F)		 -4°C
(26°F)		 -10°C
(14°F)
Mean minimum -25°C
(-12°F)		 -24°C
(-11°F)		 -19°C
(-3°F)		 -8°C
(18°F)		 -1°C
(30°F)		 3°C
(37°F)		 7°C
(45°F)		 6°C
(43°F)		 1°C
(33°F)		 -5°C
(24°F)		 -14°C
(7°F)		 -21°C
(-5°F)
Minimum -31°C
(-24°F)		 -26°C
(-14°F)		 -22°C
(-7°F)		 -13°C
(8°F)		 -4°C
(26°F)		 1°C
(33°F)		 6°C
(42°F)		 5°C
(41°F)		 -3°C
(27°F)		 -10°C
(13°F)		 -19°C
(-2°F)		 -24°C
(-11°F)

Compare climate in Monticello with other places

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

Monthly average precipitation in Monticello, Maine, United States §

Monticello usually has the most precipitation in October, November and December, with an average of 10 rainy days and 116 mm (4.6 inches) of precipitation per month. The driest months in Monticello are February, March and August. On average, 83 mm (3.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Monticello, 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) 94 (3.7) 83 (3.3) 77 (3.0) 109 (4.3) 108 (4.2) 95 (3.8) 101 (4.0) 88 (3.5) 98 (3.8) 118 (4.6) 117 (4.6) 113 (4.4)
Average precipitation days (≥ 1 mm) 9 11 9 12 13 13 12 10 10 11 11 10

Monthly sunshine hours in Monticello, Maine, United States §

The sunniest months in Monticello are June, July and August, when the sun shines an average of 10 hours 12 minutes a day. Least sunny months in Monticello: January, November and December receive an average of 4 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Monticello, 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 122 181 228 210 270 306 318 314 254 186 153 146
Mean daily daylight hours 9h 5m 10h 21m 11h 57m 13h 35m 14h 59m 15h 41m 15h 18m 14h 3m 12h 28m 10h 51m 9h 25m 8h 40m

Solar UV radiation in Monticello, Maine, United States §

Monticello 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, February 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 Monticello UV Index data.

Average daily maximum UV levels by month for Monticello, 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 3 5 7 8 10 8 8 7 5 3 2

Detailed Monthly Weather Insights for Monticello, Maine, United States

Discover in-depth weather details for every month in Monticello. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Monticello's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.