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December Weather in River Falls, United States

Last updated: June 24, 2025

In December, the average temperature in River Falls, United States is a brisk 12°C (54°F), with temperatures ranging from a chilly -4°C (24°F) to a warm 28°C (82°F). Visitors should be prepared for some precipitation, averaging 134 mm (5.3 in) over 12 days as well as a notable average humidity of 86%. Stay cozy and enjoy the unique climate!

December Temperature in River Falls

In December in River Falls, the average temperature is 12°C (54°F). Maximum temperatures can reach 28°C (82°F), while minimums can drop as low as -4°C (24°F). This wide range means travelers should pack for both warm afternoons and chilly evenings.

December Weather in River Falls: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in River Falls, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In River Falls, December typically has an average temperature of 12°C (54°F), with highs reaching up to 28°C (82°F) and lows dropping to around -4°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec515762667479818178715854
Data source: Temperature data for River Falls 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 River Falls

In River Falls in December, the precipitation amount is 134 mm (5.3 in) over a period of 12 days.

December Precipitation Trends in River Falls

The chart displays monthly precipitation patterns in River Falls, 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 River Falls, December typically receives around 134 mm (5.3 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec1001288812312215713214011410456134
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in River Falls

In River Falls in December, humidity is 86%. With an average temperature of 12°C (54°F), this humidity feels like a damp blanket wrapping around you, making outdoor activities uncomfortable and travel challenging due to the heavy, muggy atmosphere.

December Average Humidity in River Falls

This chart illustrates the average monthly humidity levels in River Falls, 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 River Falls is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%82%79%77%74%70%78%78%79%74%83%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in River Falls

In River Falls in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in River Falls for better planning.

Maximum UV Index Levels in River Falls for December

The chart shows the monthly maximum UV Index (UVI) for River Falls 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 River Falls typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111111121110864
Data source: River Falls 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 River Falls Compares to Other Months

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

This table compares monthly weather conditions in River Falls, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (51°F)100 mm (3.9 inches)83%moderate
February Weather14°C (58°F)128 mm (5.1 inches)82%very high
March Weather17°C (62°F)87 mm (3.4 inches)79%very high
April Weather19°C (67°F)123 mm (4.8 inches)77%extreme
May Weather24°C (75°F)122 mm (4.8 inches)74%extreme
June Weather26°C (79°F)157 mm (6.2 inches)70%extreme
July Weather27°C (81°F)132 mm (5.2 inches)78%extreme
August Weather27°C (81°F)140 mm (5.5 inches)78%extreme
September Weather26°C (79°F)114 mm (4.5 inches)79%very high
October Weather22°C (71°F)104 mm (4.1 inches)74%very high
November Weather14°C (58°F)56 mm (2.2 inches)83%high
December Weather12°C (54°F)134 mm (5.3 inches)86%moderate

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