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Monthly climate in Londonderry, New Hampshire, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Londonderry features a humid continental climate (Dfb).Temperatures typically range between -2 °C (29 °F) and 23 °C (74 °F) through the year, but rarely can drop to -22 °C (-8 °F) or can rise to as high as 38 °C (100 °F).The average annual precipitation amounts to about 1159 mm (45.6 inches) and receives 123 rainy days on the 1 mm (0.04 inches) threshold annually.Londonderry enjoys an average of 2995 hours of sunshine throughout the year, and daylight varies from 9 hours 3 minutes to 15 hours 16 minutes per day.

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

The warmest months in Londonderry are June, July and August, with daily mean temperatures ranging from 20 to 23 °C (69 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -2 to 0 °C (29 - 32 °F) throughout the day. On average each year, Londonderry experiences 74 days above 25 °C (77.0 °F) and 106 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, 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 20°C
(68°F)		 22°C
(73°F)		 23°C
(73°F)		 30°C
(87°F)		 35°C
(95°F)		 38°C
(100°F)		 37°C
(98°F)		 36°C
(97°F)		 35°C
(95°F)		 29°C
(85°F)		 25°C
(76°F)		 17°C
(62°F)
Mean maximum 14°C
(57°F)		 18°C
(65°F)		 19°C
(67°F)		 23°C
(74°F)		 32°C
(90°F)		 33°C
(92°F)		 36°C
(96°F)		 35°C
(95°F)		 32°C
(90°F)		 26°C
(80°F)		 21°C
(71°F)		 15°C
(60°F)
Average high 2°C
(37°F)		 4°C
(40°F)		 8°C
(46°F)		 14°C
(57°F)		 20°C
(68°F)		 26°C
(79°F)		 28°C
(83°F)		 28°C
(83°F)		 24°C
(76°F)		 18°C
(64°F)		 10°C
(50°F)		 4°C
(40°F)
Daily mean -2°C
(29°F)		 -0°C
(32°F)		 3°C
(37°F)		 9°C
(48°F)		 15°C
(59°F)		 20°C
(69°F)		 23°C
(74°F)		 23°C
(74°F)		 19°C
(66°F)		 13°C
(55°F)		 5°C
(42°F)		 0°C
(32°F)
Average low -6°C
(22°F)		 -5°C
(23°F)		 -2°C
(29°F)		 4°C
(40°F)		 10°C
(50°F)		 15°C
(59°F)		 19°C
(66°F)		 18°C
(65°F)		 14°C
(58°F)		 8°C
(48°F)		 1°C
(33°F)		 -4°C
(25°F)
Mean minimum -18°C
(0°F)		 -16°C
(3°F)		 -13°C
(9°F)		 -3°C
(27°F)		 3°C
(38°F)		 9°C
(49°F)		 14°C
(57°F)		 12°C
(53°F)		 7°C
(44°F)		 -0°C
(32°F)		 -8°C
(17°F)		 -15°C
(6°F)
Minimum -22°C
(-8°F)		 -18°C
(-1°F)		 -19°C
(-2°F)		 -4°C
(25°F)		 2°C
(35°F)		 5°C
(41°F)		 12°C
(55°F)		 10°C
(51°F)		 3°C
(38°F)		 -4°C
(25°F)		 -13°C
(8°F)		 -21°C
(-6°F)

Compare climate in Londonderry with other places

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

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

Londonderry usually has the most precipitation in April, July and October, with an average of 11 rainy days and 128 mm (5.1 inches) of precipitation per month.The driest months in Londonderry are January, August and September. On average, 73 mm (2.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Londonderry, 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) 68 (2.7) 84 (3.3) 85 (3.3) 127 (5.0) 82 (3.2) 89 (3.5) 131 (5.2) 77 (3.0) 73 (2.9) 128 (5.0) 95 (3.7) 121 (4.8)
Average precipitation days (≥ 1 mm) 8 11 10 12 10 11 12 11 8 11 10 9

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

The sunniest months in Londonderry are June, July and August, when the sun shines an average of 10 hours 48 minutes a day.Least sunny months in Londonderry: January, February and December receive an average of 5 hours 40 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Londonderry, 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 153 186 254 240 291 327 334 332 280 220 197 176
Mean daily daylight hours 9h 25m 10h 32m 11h 57m 13h 25m 14h 39m 15h 16m 14h 56m 13h 50m 12h 26m 10h 59m 9h 43m 9h 3m

Solar UV radiation in Londonderry, New Hampshire, 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, 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) 2 5 5 8 9 10 9 9 7 6 3 2