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December Weather in Waupun, United States

Last updated: June 24, 2025

In December, the average temperature in Waupun, United States hovers around -2°C (28°F), with extremes ranging from a chilling -23°C (-10°F) to a surprisingly warm 17°C (64°F). Expect about 47 mm (1.9 in) of precipitation spread across 7 days, and prepare for a relatively high average humidity of 81%. Whether you're bundling up for the cold or enjoying the occasional thaw, this month's weather will keep you on your toes!

December Temperature in Waupun

In December in Waupun, the average temperature is -2°C (28°F), with maximums reaching 17°C (64°F) and minimums dropping to -23°C (-10°F). Be sure to prepare for a wide range of temperatures if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Waupun, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waupun, December typically has an average temperature of -2°C (28°F), with highs reaching up to 17°C (64°F) and lows dropping to around -23°C (-10°F).
JanFebMarAprMayJunJulAugSepOctNovDec202134445869737064513628
Data source: Temperature data for Waupun 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 Waupun

In Waupun in December, the total precipitation amount is 47 mm (1.9 in) recorded over a span of 7 days.

December Precipitation Trends in Waupun

The chart displays monthly precipitation patterns in Waupun, 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 Waupun, December typically receives around 47 mm (1.9 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec4648599911610510498851054647
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Waupun

In Waupun in December, humidity is 81%. With an average temperature of -2°C (28°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and necessitating extra layers to stay warm and dry.

December Average Humidity in Waupun

This chart illustrates the average monthly humidity levels in Waupun, 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 Waupun 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 Waupun

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

Maximum UV Index Levels in Waupun for December

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

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

This table compares monthly weather conditions in Waupun, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)46 mm (1.8 inches)85%moderate
February Weather-6°C (21°F)48 mm (1.9 inches)85%moderate
March Weather1°C (34°F)59 mm (2.3 inches)85%moderate
April Weather7°C (44°F)99 mm (3.9 inches)85%very high
May Weather14°C (58°F)116 mm (4.6 inches)78%very high
June Weather21°C (69°F)105 mm (4.1 inches)80%very high
July Weather23°C (74°F)104 mm (4.1 inches)78%very high
August Weather21°C (71°F)98 mm (3.9 inches)76%very high
September Weather18°C (64°F)85 mm (3.3 inches)79%high
October Weather10°C (51°F)105 mm (4.1 inches)83%moderate
November Weather2°C (36°F)46 mm (1.8 inches)88%moderate
December Weather-2°C (28°F)47 mm (1.9 inches)81%low

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