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December Weather in Napoleon, United States

Last updated: June 24, 2025

In Napoleon, United States, the average temperature in December is a crisp 1°C (34°F). You can expect chilly extremes, with minimums dipping to -24°C (-11°F) and maximums reaching 17°C (62°F). Prepare for some moisture, as 56 mm (2.2 in) of precipitation can be expected over 9 days, alongside an average humidity level of 86%.

December Temperature in Napoleon

In December in Napoleon, the average temperature is 1°C (34°F). Maximum temperatures can reach 17°C (62°F), while minimums can dip as low as -24°C (-11°F). Be prepared for a wide range of temperatures when traveling to Napoleon during this month.

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 1°C (34°F), with highs reaching up to 17°C (62°F) and lows dropping to around -24°C (-11°F).
JanFebMarAprMayJunJulAugSepOctNovDec283039496271757368564134
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 precipitation amount is 56 mm (2.2 in) over a period of 9 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 56 mm (2.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec697088931391121038857908156
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 86%. With an average temperature of 1°C (34°F), this humidity feels like a chilling embrace, making outdoor adventures brisk and invigorating but challenging for travel.

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 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec35699101098642
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-2°C (28°F)69 mm (2.7 inches)88%moderate
February Weather-1°C (30°F)70 mm (2.8 inches)87%moderate
March Weather4°C (40°F)88 mm (3.5 inches)87%high
April Weather9°C (49°F)93 mm (3.7 inches)87%very high
May Weather16°C (62°F)139 mm (5.5 inches)81%very high
June Weather22°C (72°F)112 mm (4.4 inches)82%very high
July Weather24°C (76°F)103 mm (4.0 inches)81%very high
August Weather23°C (73°F)88 mm (3.5 inches)78%very high
September Weather20°C (68°F)57 mm (2.2 inches)78%very high
October Weather13°C (56°F)90 mm (3.6 inches)82%high
November Weather5°C (41°F)81 mm (3.2 inches)89%moderate
December Weather1°C (34°F)56 mm (2.2 inches)86%low

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