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Monthly climate in Londonderry, Vermont, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Londonderry features a humid continental climate (Dfb).Temperatures typically range between -6 °C (21 °F) and 21 °C (69 °F) through the year, but rarely can drop to -30 °C (-22 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 1341 mm (52.8 inches) and receives 146 rainy days on the 1 mm (0.04 inches) threshold annually.Londonderry enjoys an average of 2840 hours of sunshine throughout the year, and daylight varies from 9 hours 0 minutes to 15 hours 19 minutes per day.

Monthly average temperatures in Londonderry, Vermont, United States §

The warmest months in Londonderry 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 -6 to -4 °C (21 - 26 °F) throughout the day. On average each year, Londonderry experiences 46 days above 25 °C (77.0 °F) and 139 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Londonderry, Vermont, 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
(60°F)		 21°C
(70°F)		 20°C
(67°F)		 25°C
(78°F)		 32°C
(89°F)		 33°C
(92°F)		 36°C
(97°F)		 32°C
(89°F)		 30°C
(87°F)		 25°C
(78°F)		 22°C
(72°F)		 14°C
(57°F)
Mean maximum 9°C
(49°F)		 13°C
(55°F)		 16°C
(62°F)		 21°C
(70°F)		 29°C
(85°F)		 30°C
(87°F)		 32°C
(90°F)		 31°C
(87°F)		 29°C
(84°F)		 23°C
(74°F)		 18°C
(64°F)		 12°C
(53°F)
Average high -2°C
(29°F)		 0°C
(32°F)		 4°C
(39°F)		 11°C
(52°F)		 18°C
(65°F)		 23°C
(74°F)		 26°C
(79°F)		 25°C
(77°F)		 21°C
(71°F)		 14°C
(58°F)		 6°C
(43°F)		 0°C
(33°F)
Daily mean -6°C
(21°F)		 -5°C
(24°F)		 -1°C
(31°F)		 6°C
(43°F)		 13°C
(55°F)		 18°C
(64°F)		 21°C
(69°F)		 20°C
(67°F)		 16°C
(61°F)		 9°C
(49°F)		 1°C
(35°F)		 -4°C
(26°F)
Average low -11°C
(13°F)		 -10°C
(15°F)		 -6°C
(22°F)		 2°C
(35°F)		 7°C
(45°F)		 12°C
(54°F)		 15°C
(60°F)		 15°C
(58°F)		 11°C
(51°F)		 5°C
(41°F)		 -3°C
(27°F)		 -8°C
(18°F)
Mean minimum -24°C
(-10°F)		 -22°C
(-7°F)		 -18°C
(0°F)		 -5°C
(23°F)		 0°C
(33°F)		 7°C
(45°F)		 10°C
(50°F)		 8°C
(46°F)		 2°C
(35°F)		 -4°C
(26°F)		 -15°C
(5°F)		 -22°C
(-7°F)
Minimum -30°C
(-22°F)		 -27°C
(-16°F)		 -20°C
(-3°F)		 -10°C
(15°F)		 -2°C
(29°F)		 1°C
(34°F)		 8°C
(47°F)		 6°C
(42°F)		 -2°C
(28°F)		 -8°C
(18°F)		 -24°C
(-11°F)		 -25°C
(-12°F)

Compare climate in Londonderry with other places

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

Monthly average precipitation in Londonderry, Vermont, United States §

Londonderry usually has the most precipitation in April, July and October, with an average of 14 rainy days and 150 mm (5.9 inches) of precipitation per month.The driest months in Londonderry are January, February and March. On average, 82 mm (3.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Londonderry, Vermont, 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) 78 (3.1) 91 (3.6) 78 (3.1) 131 (5.2) 103 (4.0) 114 (4.5) 163 (6.4) 120 (4.7) 95 (3.7) 157 (6.2) 107 (4.2) 105 (4.1)
Average precipitation days (≥ 1 mm) 10 12 10 15 14 14 15 12 9 13 12 10

Monthly sunshine hours in Londonderry, Vermont, United States §

The sunniest months in Londonderry are June, July and August, when the sun shines an average of 10 hours 40 minutes a day.Least sunny months in Londonderry: January, February 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 Londonderry, Vermont, 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 131 167 236 226 271 320 327 333 286 204 176 157
Mean daily daylight hours 9h 22m 10h 31m 11h 57m 13h 26m 14h 41m 15h 19m 14h 59m 13h 51m 12h 26m 10h 58m 9h 40m 9h 0m

Solar UV radiation in Londonderry, Vermont, United States §

Londonderry 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 Londonderry UV Index data.

Average daily maximum UV levels by month for Londonderry, Vermont, 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 6 8 10 10 9 9 7 6 3 2