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December Weather in Winooski, United States

Last updated: June 24, 2025

In Winooski, United States, the average temperature in December hovers around -2°C (28°F), with potential extremes ranging from a chilly -24°C (-11°F) to a milder 15°C (59°F). Expect 73 mm (2.9 in) of precipitation over approximately 13 days, and feel the damp air with an average humidity of 89%. Stay warm and dry!

December Temperature in Winooski

In December, in Winooski, the average temperature is -2°C (28°F). The maximum can reach 15°C (59°F), while the minimum can drop as low as -24°C (-11°F). Travelers should prepare for a wide range of temperatures and dress in layers to stay comfortable during their visit.

December Weather in Winooski: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Winooski, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Winooski, December typically has an average temperature of -2°C (28°F), with highs reaching up to 15°C (59°F) and lows dropping to around -24°C (-11°F).
JanFebMarAprMayJunJulAugSepOctNovDec212431445766727063513728
Data source: Temperature data for Winooski generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Winooski

In Winooski in December, the precipitation amount is 73 mm (2.9 in) over the course of 13 days.

December Precipitation Trends in Winooski

The chart displays monthly precipitation patterns in Winooski, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Winooski, December typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec767470101819096826514210473
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Winooski

In Winooski in December, humidity is 89%. With an average temperature of -2°C (28°F), this humidity feels like a heavy blanket, making it difficult to stay warm while traveling outdoors.

December Average Humidity in Winooski

This chart illustrates the average monthly humidity levels in Winooski, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Winooski is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Winooski

In Winooski in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Winooski, you can visit Hourly UV Index in Winooski.

Maximum UV Index Levels in Winooski for December

The chart shows the monthly maximum UV Index (UVI) for Winooski in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Winooski typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Winooski December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Winooski Compares to Other Months

Weather in Winooski varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Winooski, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Winooski, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)76 mm (3.0 inches)93%low
February Weather-5°C (24°F)74 mm (2.9 inches)92%moderate
March Weather-1°C (31°F)69 mm (2.7 inches)86%moderate
April Weather7°C (44°F)101 mm (4.0 inches)85%very high
May Weather14°C (57°F)81 mm (3.2 inches)80%very high
June Weather19°C (66°F)90 mm (3.5 inches)74%very high
July Weather22°C (72°F)96 mm (3.8 inches)76%very high
August Weather21°C (70°F)82 mm (3.2 inches)75%very high
September Weather17°C (63°F)65 mm (2.6 inches)78%high
October Weather11°C (52°F)142 mm (5.6 inches)86%moderate
November Weather3°C (37°F)104 mm (4.1 inches)88%moderate
December Weather-2°C (28°F)73 mm (2.9 inches)89%low

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