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December Weather in Grantsburg, United States

Last updated: June 24, 2025

In Grantsburg, United States, the average temperature in December hovers around -6°C (22°F). However, be prepared for extremes, as temperatures can plummet to a chilling -27°C (-17°F) and occasionally rise to a mild 14°C (57°F). During this month, expect 54 mm (2.1 in) of precipitation spread over about 8 days, while the average humidity remains high at 84%. Stay warm and dry!

December Temperature in Grantsburg

In December in Grantsburg, the average temperature is -6°C (22°F). Maximum temperatures can reach 14°C (57°F), while minimums can drop as low as -27°C (-17°F). Therefore, travelers should prepare for a wide range of temperatures and dress in layers to stay comfortable during their visit.

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

The chart illustrates December temperature patterns in Grantsburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grantsburg, December typically has an average temperature of -6°C (22°F), with highs reaching up to 14°C (57°F) and lows dropping to around -27°C (-17°F).
JanFebMarAprMayJunJulAugSepOctNovDec151532425869736963473222
Data source: Temperature data for Grantsburg 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 Grantsburg

In Grantsburg in December, the total precipitation amount reaches 54 mm (2.1 in) over a span of 8 days.

December Precipitation Trends in Grantsburg

The chart displays monthly precipitation patterns in Grantsburg, 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 Grantsburg, December typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec2030478910480100127961003854
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Grantsburg

In Grantsburg in December humidity is 84%. With an average temperature of -6°C (22°F), this humidity feels like an unpleasant chill that seeps into your bones, making travel feel much more uncomfortable and harsh than the temperature alone suggests.

December Average Humidity in Grantsburg

This chart illustrates the average monthly humidity levels in Grantsburg, 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 Grantsburg is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%90%85%84%78%80%81%81%81%84%88%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Grantsburg

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

Maximum UV Index Levels in Grantsburg for December

The chart shows the monthly maximum UV Index (UVI) for Grantsburg 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 Grantsburg typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Grantsburg 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 Grantsburg Compares to Other Months

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

This table compares monthly weather conditions in Grantsburg, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)20 mm (0.8 inches)87%low
February Weather-9°C (16°F)30 mm (1.2 inches)90%moderate
March Weather0°C (32°F)47 mm (1.8 inches)85%moderate
April Weather6°C (42°F)89 mm (3.5 inches)84%high
May Weather14°C (58°F)104 mm (4.1 inches)78%very high
June Weather21°C (70°F)80 mm (3.2 inches)80%very high
July Weather23°C (73°F)100 mm (4.0 inches)81%very high
August Weather21°C (70°F)127 mm (5.0 inches)81%very high
September Weather17°C (63°F)96 mm (3.8 inches)81%high
October Weather8°C (47°F)100 mm (3.9 inches)84%moderate
November Weather0°C (32°F)38 mm (1.5 inches)88%moderate
December Weather-6°C (22°F)54 mm (2.1 inches)84%low

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