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Monthly climate in Windsor, Connecticut, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Windsor features a humid continental climate (Dfa). Temperatures typically range between -1 °C (31 °F) and 24 °C (75 °F) through the year, but rarely can drop to -23 °C (-9 °F) or can rise to as high as 38 °C (100 °F). The average annual precipitation amounts to about 1247 mm (49.1 inches) and receives 125 rainy days on the 1 mm (0.04 inches) threshold annually. Windsor enjoys an average of 3003 hours of sunshine throughout the year, and daylight varies from 9 hours 11 minutes to 15 hours 8 minutes per day.

Monthly average temperatures in Windsor, Connecticut, United States §

The warmest months in Windsor are June, July and August, with daily mean temperatures ranging from 21 to 24 °C (69 - 75 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -1 to 1 °C (31 - 34 °F) throughout the day. On average each year, Windsor experiences 77 days above 25 °C (77.0 °F) and 99 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Windsor, Connecticut, 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)		 23°C
(73°F)		 25°C
(77°F)		 29°C
(85°F)		 34°C
(94°F)		 36°C
(97°F)		 38°C
(100°F)		 36°C
(97°F)		 35°C
(95°F)		 31°C
(87°F)		 24°C
(76°F)		 17°C
(63°F)
Mean maximum 14°C
(57°F)		 18°C
(64°F)		 20°C
(69°F)		 24°C
(75°F)		 31°C
(88°F)		 34°C
(93°F)		 36°C
(97°F)		 34°C
(93°F)		 31°C
(89°F)		 27°C
(81°F)		 22°C
(71°F)		 15°C
(60°F)
Average high 3°C
(38°F)		 5°C
(41°F)		 9°C
(48°F)		 15°C
(58°F)		 21°C
(69°F)		 26°C
(79°F)		 29°C
(84°F)		 28°C
(83°F)		 24°C
(76°F)		 18°C
(65°F)		 11°C
(51°F)		 5°C
(41°F)
Daily mean -1°C
(31°F)		 1°C
(33°F)		 4°C
(39°F)		 9°C
(49°F)		 15°C
(60°F)		 21°C
(69°F)		 24°C
(75°F)		 23°C
(74°F)		 19°C
(67°F)		 13°C
(57°F)		 6°C
(43°F)		 1°C
(34°F)
Average low -5°C
(23°F)		 -4°C
(25°F)		 -1°C
(30°F)		 5°C
(41°F)		 10°C
(51°F)		 15°C
(59°F)		 19°C
(66°F)		 18°C
(65°F)		 14°C
(58°F)		 9°C
(48°F)		 1°C
(34°F)		 -3°C
(27°F)
Mean minimum -18°C
(-1°F)		 -16°C
(4°F)		 -11°C
(12°F)		 -2°C
(28°F)		 3°C
(39°F)		 10°C
(50°F)		 14°C
(58°F)		 12°C
(53°F)		 6°C
(44°F)		 -0°C
(32°F)		 -8°C
(17°F)		 -13°C
(9°F)
Minimum -23°C
(-9°F)		 -21°C
(-6°F)		 -20°C
(-4°F)		 -6°C
(22°F)		 1°C
(34°F)		 6°C
(43°F)		 13°C
(55°F)		 11°C
(51°F)		 3°C
(37°F)		 -4°C
(26°F)		 -13°C
(8°F)		 -21°C
(-6°F)

Compare climate in Windsor with other places

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

Monthly average precipitation in Windsor, Connecticut, United States §

Windsor usually has the most precipitation in April, July and October, with an average of 12 rainy days and 136 mm (5.3 inches) of precipitation per month. The driest months in Windsor are January, February and June. On average, 79 mm (3.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Windsor, Connecticut, 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) 67 (2.6) 86 (3.4) 88 (3.5) 126 (5.0) 113 (4.4) 84 (3.3) 147 (5.8) 90 (3.5) 102 (4.0) 134 (5.3) 90 (3.5) 120 (4.7)
Average precipitation days (≥ 1 mm) 8 10 9 12 12 11 13 11 9 11 9 10

Monthly sunshine hours in Windsor, Connecticut, United States §

The sunniest months in Windsor are June, July and August, when the sun shines an average of 10 hours 44 minutes a day. Least sunny months in Windsor: January, February and December receive an average of 5 hours 38 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Windsor, Connecticut, 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 151 183 257 246 282 320 342 325 283 223 208 178
Mean daily daylight hours 9h 31m 10h 36m 11h 58m 13h 22m 14h 33m 15h 8m 14h 49m 13h 46m 12h 25m 11h 1m 9h 48m 9h 11m

Solar UV radiation in Windsor, Connecticut, United States §

Windsor 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 4. For more detailed information, check out our hourly Windsor UV Index data.

Average daily maximum UV levels by month for Windsor, Connecticut, 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 5 6 8 10 10 9 9 8 6 4 2

Detailed Monthly Weather Insights for Windsor, Connecticut, United States

Discover in-depth weather details for every month in Windsor. 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 Windsor'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.