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Monthly climate in Winooski, Vermont, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Winooski features a humid continental climate (Dfb).Temperatures typically range between -6 °C (22 °F) and 22 °C (72 °F) through the year, but rarely can drop to -28 °C (-18 °F) or can rise to as high as 35 °C (96 °F).The average annual precipitation amounts to about 1053 mm (41.5 inches) and receives 145 rainy days on the 1 mm (0.04 inches) threshold annually.Winooski enjoys an average of 2682 hours of sunshine throughout the year, and daylight varies from 8 hours 52 minutes to 15 hours 28 minutes per day.

Monthly average temperatures in Winooski, Vermont, United States §

The warmest months in Winooski are June, July and August, with daily mean temperatures ranging from 19 to 22 °C (66 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -2 °C (22 - 28 °F) throughout the day. On average each year, Winooski experiences 59 days above 25 °C (77.0 °F) and 121 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Winooski, 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 13°C
(56°F)		 17°C
(63°F)		 22°C
(72°F)		 25°C
(78°F)		 35°C
(96°F)		 35°C
(96°F)		 35°C
(96°F)		 33°C
(92°F)		 33°C
(91°F)		 26°C
(79°F)		 23°C
(73°F)		 15°C
(59°F)
Mean maximum 8°C
(46°F)		 11°C
(51°F)		 16°C
(61°F)		 22°C
(72°F)		 31°C
(88°F)		 31°C
(89°F)		 32°C
(90°F)		 32°C
(90°F)		 30°C
(86°F)		 24°C
(75°F)		 17°C
(63°F)		 12°C
(53°F)
Average high -2°C
(28°F)		 -0°C
(32°F)		 4°C
(39°F)		 11°C
(52°F)		 19°C
(67°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)		 -5°C
(24°F)		 -1°C
(31°F)		 7°C
(44°F)		 14°C
(57°F)		 19°C
(66°F)		 22°C
(72°F)		 21°C
(70°F)		 17°C
(63°F)		 11°C
(52°F)		 3°C
(37°F)		 -2°C
(28°F)
Average low -10°C
(15°F)		 -9°C
(16°F)		 -5°C
(24°F)		 2°C
(37°F)		 8°C
(47°F)		 13°C
(56°F)		 17°C
(63°F)		 17°C
(62°F)		 13°C
(55°F)		 7°C
(45°F)		 -1°C
(31°F)		 -5°C
(23°F)
Mean minimum -22°C
(-7°F)		 -20°C
(-5°F)		 -17°C
(2°F)		 -4°C
(25°F)		 1°C
(34°F)		 8°C
(46°F)		 11°C
(53°F)		 11°C
(51°F)		 5°C
(41°F)		 -0°C
(32°F)		 -11°C
(13°F)		 -17°C
(2°F)
Minimum -28°C
(-18°F)		 -24°C
(-11°F)		 -19°C
(-2°F)		 -7°C
(20°F)		 0°C
(32°F)		 2°C
(36°F)		 10°C
(50°F)		 9°C
(49°F)		 2°C
(36°F)		 -3°C
(27°F)		 -15°C
(6°F)		 -24°C
(-11°F)

Compare climate in Winooski with other places

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

Monthly average precipitation in Winooski, Vermont, United States §

Winooski usually has the most precipitation in April, October and November, with an average of 13 rainy days and 116 mm (4.6 inches) of precipitation per month.The driest months in Winooski are March, September and December. On average, 69 mm (2.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Winooski, 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) 76 (3.0) 74 (2.9) 69 (2.7) 101 (4.0) 81 (3.2) 90 (3.5) 96 (3.8) 82 (3.2) 65 (2.6) 142 (5.6) 104 (4.1) 73 (2.9)
Average precipitation days (≥ 1 mm) 12 13 11 13 12 11 12 12 9 13 14 13

Monthly sunshine hours in Winooski, Vermont, United States §

The sunniest months in Winooski are June, July and August, when the sun shines an average of 10 hours 40 minutes a day.Least sunny months in Winooski: January, November and December receive an average of 4 hours 3 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Winooski, 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 106 147 221 214 269 318 334 329 283 190 137 129
Mean daily daylight hours 9h 15m 10h 26m 11h 57m 13h 30m 14h 49m 15h 28m 15h 7m 13h 56m 12h 27m 10h 55m 9h 34m 8h 52m

Solar UV radiation in Winooski, Vermont, United States §

Winooski 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 Winooski UV Index data.

Average daily maximum UV levels by month for Winooski, 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) 2 4 5 8 9 10 9 9 7 5 3 2