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December Weather in Napoleon, United States

Last updated: June 24, 2025

In December, the average temperature in Napoleon, United States hovers around -6°C (21°F). Expect extremes, with lows plunging to -31°C (-24°F) and highs reaching up to 14°C (57°F). Rainfall is modest at 29 mm (1.1 in) over about 5 days, while humidity remains high at an average of 84%. Enjoy the chill! ❄️

December Temperature in Napoleon

In December in Napoleon, the average temperature is -6°C (21°F). Maximum temperatures can reach 14°C (57°F), while minimums can drop as low as -31°C (-24°F). Be prepared for extreme temperature variations when traveling.

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

The chart illustrates December temperature patterns in Napoleon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Napoleon, December typically has an average temperature of -6°C (21°F), with highs reaching up to 14°C (57°F) and lows dropping to around -31°C (-24°F).
JanFebMarAprMayJunJulAugSepOctNovDec131128395468726860433020
Data source: Temperature data for Napoleon 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 Napoleon

In Napoleon in December, the total precipitation amount is 29 mm (1.1 in) recorded over a span of 5 days.

December Precipitation Trends in Napoleon

The chart displays monthly precipitation patterns in Napoleon, 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 Napoleon, December typically receives around 29 mm (1.1 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec151726356185739461661729
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Napoleon

In Napoleon in December humidity is 84%. With an average temperature of -6°C (21°F), this humidity feels like an icy blanket enveloping you, making travel uncomfortable as the cold dampness seeps into your bones and slows your movements, turning each step into a shivering struggle.

December Average Humidity in Napoleon

This chart illustrates the average monthly humidity levels in Napoleon, 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 Napoleon is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%89%82%79%74%78%76%77%72%74%85%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Napoleon

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

Maximum UV Index Levels in Napoleon for December

The chart shows the monthly maximum UV Index (UVI) for Napoleon 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 Napoleon typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3559910997532
Data source: Napoleon 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 Napoleon Compares to Other Months

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

This table compares monthly weather conditions in Napoleon, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (14°F)15 mm (0.6 inches)87%moderate
February Weather-12°C (11°F)17 mm (0.7 inches)89%moderate
March Weather-2°C (29°F)26 mm (1.0 inches)82%moderate
April Weather4°C (39°F)35 mm (1.4 inches)79%very high
May Weather12°C (55°F)61 mm (2.4 inches)74%very high
June Weather20°C (68°F)85 mm (3.3 inches)78%very high
July Weather22°C (73°F)73 mm (2.9 inches)76%very high
August Weather20°C (69°F)94 mm (3.7 inches)77%very high
September Weather15°C (60°F)61 mm (2.4 inches)72%high
October Weather6°C (43°F)66 mm (2.6 inches)74%moderate
November Weather-1°C (30°F)17 mm (0.7 inches)85%moderate
December Weather-6°C (21°F)29 mm (1.1 inches)84%low

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