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Monthly climate in Sunapee, New Hampshire, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Sunapee features a humid continental climate (Dfb).Temperatures typically range between -6 °C (22 °F) and 22 °C (71 °F) through the year, but rarely can drop to -30 °C (-21 °F) or can rise to as high as 35 °C (96 °F).The average annual precipitation amounts to about 1144 mm (45.0 inches) and receives 129 rainy days on the 1 mm (0.04 inches) threshold annually.Sunapee enjoys an average of 2844 hours of sunshine throughout the year, and daylight varies from 8 hours 59 minutes to 15 hours 20 minutes per day.

Monthly average temperatures in Sunapee, New Hampshire, United States §

The warmest months in Sunapee are June, July and August, with daily mean temperatures ranging from 19 to 22 °C (66 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -3 °C (22 - 26 °F) throughout the day. On average each year, Sunapee experiences 58 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 Sunapee, New Hampshire, 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)		 22°C
(71°F)		 21°C
(70°F)		 26°C
(80°F)		 33°C
(91°F)		 35°C
(95°F)		 35°C
(96°F)		 35°C
(94°F)		 32°C
(89°F)		 26°C
(79°F)		 23°C
(73°F)		 15°C
(59°F)
Mean maximum 10°C
(50°F)		 13°C
(56°F)		 17°C
(62°F)		 21°C
(70°F)		 31°C
(87°F)		 31°C
(88°F)		 33°C
(92°F)		 32°C
(91°F)		 30°C
(86°F)		 24°C
(75°F)		 18°C
(65°F)		 13°C
(55°F)
Average high -1°C
(30°F)		 1°C
(33°F)		 4°C
(40°F)		 11°C
(52°F)		 19°C
(66°F)		 24°C
(76°F)		 27°C
(81°F)		 26°C
(79°F)		 22°C
(72°F)		 15°C
(59°F)		 6°C
(43°F)		 1°C
(34°F)
Daily mean -6°C
(22°F)		 -4°C
(25°F)		 -0°C
(32°F)		 6°C
(44°F)		 13°C
(56°F)		 19°C
(66°F)		 22°C
(71°F)		 21°C
(69°F)		 17°C
(62°F)		 10°C
(50°F)		 2°C
(36°F)		 -3°C
(26°F)
Average low -10°C
(14°F)		 -9°C
(16°F)		 -5°C
(23°F)		 2°C
(36°F)		 8°C
(46°F)		 13°C
(55°F)		 16°C
(62°F)		 15°C
(60°F)		 11°C
(53°F)		 6°C
(43°F)		 -2°C
(29°F)		 -8°C
(19°F)
Mean minimum -23°C
(-10°F)		 -21°C
(-6°F)		 -17°C
(2°F)		 -4°C
(24°F)		 1°C
(34°F)		 8°C
(47°F)		 10°C
(51°F)		 9°C
(48°F)		 3°C
(38°F)		 -2°C
(28°F)		 -12°C
(10°F)		 -23°C
(-8°F)
Minimum -30°C
(-21°F)		 -28°C
(-17°F)		 -20°C
(-3°F)		 -7°C
(20°F)		 -1°C
(31°F)		 2°C
(36°F)		 9°C
(48°F)		 7°C
(45°F)		 -2°C
(28°F)		 -4°C
(25°F)		 -18°C
(0°F)		 -25°C
(-13°F)

Compare climate in Sunapee with other places

Compare temperature, precipitation, sunshine, UV index in Sunapee, New Hampshire, United States with other places around the world.

Monthly average precipitation in Sunapee, New Hampshire, United States §

Sunapee usually has the most precipitation in April, July and October, with an average of 12 rainy days and 125 mm (4.9 inches) of precipitation per month.The driest months in Sunapee are January, March and September. On average, 70 mm (2.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sunapee, New Hampshire, 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) 70 (2.8) 82 (3.2) 75 (2.9) 121 (4.8) 83 (3.3) 91 (3.6) 125 (4.9) 89 (3.5) 65 (2.6) 129 (5.1) 106 (4.2) 109 (4.3)
Average precipitation days (≥ 1 mm) 9 11 9 12 12 12 13 10 8 12 12 9

Monthly sunshine hours in Sunapee, New Hampshire, United States §

The sunniest months in Sunapee are June, July and August, when the sun shines an average of 10 hours 38 minutes a day.Least sunny months in Sunapee: January, February and December receive an average of 5 hours 7 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sunapee, New Hampshire, 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 135 167 242 223 270 320 325 332 288 199 174 163
Mean daily daylight hours 9h 21m 10h 30m 11h 58m 13h 27m 14h 43m 15h 20m 15h 0m 13h 52m 12h 26m 10h 57m 9h 39m 8h 59m

Solar UV radiation in Sunapee, New Hampshire, United States §

Sunapee experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 9 - 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 Sunapee UV Index data.

Average daily maximum UV levels by month for Sunapee, New Hampshire, 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 4 5 8 9 10 9 9 7 5 3 2