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December Weather in Winthrop, United States

Last updated: June 24, 2025

In December, the average temperature in Winthrop, United States hovers around -3°C (27°F), with a minimum dipping as low as -25°C (-13°F) and a maximum reaching up to 15°C (59°F). Expect about 114 mm (4.5 in) of precipitation spread over 10 days, coupled with an average humidity of 85%—ideal for cozy indoor activities!

December Temperature in Winthrop

In December in Winthrop, the average temperature is -3°C (27°F), with maximums reaching 15°C (59°F) and minimums plummeting to -25°C (-13°F). It's essential to prepare for a wide range of temperatures when planning your trip to Winthrop during this month.

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

The chart illustrates December temperature patterns in Winthrop, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Winthrop, December typically has an average temperature of -3°C (27°F), with highs reaching up to 15°C (59°F) and lows dropping to around -25°C (-13°F).
JanFebMarAprMayJunJulAugSepOctNovDec232531435565707062513727
Data source: Temperature data for Winthrop 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 Winthrop

In Winthrop in December, the precipitation amount is 114 mm (4.5 in) over a period of 10 days.

December Precipitation Trends in Winthrop

The chart displays monthly precipitation patterns in Winthrop, 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 Winthrop, December typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec82847211879671178573128107114
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Winthrop

In Winthrop in December humidity is 85%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill that seeps through layers of clothing, making travel seem daunting and the cold air sting your skin.

December Average Humidity in Winthrop

This chart illustrates the average monthly humidity levels in Winthrop, 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 Winthrop is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%85%84%78%72%75%74%77%85%86%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Winthrop

In Winthrop 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 Winthrop, you can visit Hourly UV Index in Winthrop.

Maximum UV Index Levels in Winthrop for December

The chart shows the monthly maximum UV Index (UVI) for Winthrop 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 Winthrop typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910987532
Data source: Winthrop 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 Winthrop Compares to Other Months

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

This table compares monthly weather conditions in Winthrop, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)82 mm (3.2 inches)91%low
February Weather-4°C (25°F)84 mm (3.3 inches)89%moderate
March Weather0°C (32°F)72 mm (2.8 inches)85%moderate
April Weather6°C (44°F)118 mm (4.6 inches)84%very high
May Weather13°C (55°F)79 mm (3.1 inches)78%very high
June Weather18°C (65°F)67 mm (2.6 inches)72%very high
July Weather21°C (71°F)117 mm (4.6 inches)75%very high
August Weather21°C (70°F)85 mm (3.3 inches)74%very high
September Weather17°C (63°F)73 mm (2.9 inches)77%high
October Weather11°C (52°F)128 mm (5.1 inches)85%moderate
November Weather3°C (38°F)107 mm (4.2 inches)86%moderate
December Weather-3°C (27°F)114 mm (4.5 inches)85%low

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