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December Weather in Pewaukee, United States

Last updated: June 24, 2025

In December, the average temperature in Pewaukee, United States hovers around -1°C (31°F), with lows plummeting to -22°C (-7°F) and highs reaching up to 19°C (66°F). Expect 48 mm (1.9 in) of precipitation spread over 6 days, contributing to an average humidity of 81%. Prepare accordingly for a chilly yet captivating month!

December Temperature in Pewaukee

In December in Pewaukee, the average temperature is -1°C (31°F), with a maximum reaching 19°C (66°F) and a minimum plummeting to -22°C (-7°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack appropriately for both warmth and cooler conditions.

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

The chart illustrates December temperature patterns in Pewaukee, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pewaukee, December typically has an average temperature of -1°C (31°F), with highs reaching up to 19°C (66°F) and lows dropping to around -22°C (-7°F).
JanFebMarAprMayJunJulAugSepOctNovDec232536455869747265523730
Data source: Temperature data for Pewaukee 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 Pewaukee

In Pewaukee in December, the precipitation amount is 48 mm (1.9 in) distributed over 6 days.

December Precipitation Trends in Pewaukee

The chart displays monthly precipitation patterns in Pewaukee, 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 Pewaukee, December typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec5753621091341059282991114748
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Pewaukee

In Pewaukee in December humidity is 81%. With an average temperature of -1°C (31°F), this humidity feels like a heavy, cold mist that clings to your skin, making outdoor adventures damp and challenging.

December Average Humidity in Pewaukee

This chart illustrates the average monthly humidity levels in Pewaukee, 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 Pewaukee is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Pewaukee

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

Maximum UV Index Levels in Pewaukee for December

The chart shows the monthly maximum UV Index (UVI) for Pewaukee 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 Pewaukee typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34589101097532
Data source: Pewaukee 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 Pewaukee Compares to Other Months

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

This table compares monthly weather conditions in Pewaukee, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)57 mm (2.2 inches)85%moderate
February Weather-4°C (25°F)53 mm (2.1 inches)85%moderate
March Weather2°C (36°F)62 mm (2.5 inches)85%moderate
April Weather7°C (46°F)109 mm (4.3 inches)85%very high
May Weather14°C (58°F)134 mm (5.3 inches)78%very high
June Weather21°C (69°F)105 mm (4.1 inches)80%very high
July Weather23°C (75°F)92 mm (3.6 inches)78%very high
August Weather22°C (72°F)82 mm (3.2 inches)76%very high
September Weather19°C (66°F)99 mm (3.9 inches)79%high
October Weather11°C (52°F)111 mm (4.4 inches)83%moderate
November Weather3°C (38°F)47 mm (1.8 inches)88%moderate
December Weather-1°C (31°F)48 mm (1.9 inches)81%low

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