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December Weather in Grimsley, United States

Last updated: June 24, 2025

In December, the average temperature in Grimsley, United States hovers around 6°C (44°F), though it can dip to a chilly -12°C (11°F) or rise as high as a pleasant 23°C (73°F). Expect about 146 mm (5.7 in) of precipitation spread over 11 days, contributing to an average humidity level of 88%. Prepare for a month that balances cool breezes with the occasional damp day!

December Temperature in Grimsley

In December in Grimsley, the average temperature is 6°C (44°F), with maximums reaching up to 23°C (73°F) and minimums dropping as low as -12°C (11°F). Travelers should be prepared for a wide range of temperatures during this time.

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

The chart illustrates December temperature patterns in Grimsley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grimsley, December typically has an average temperature of 6°C (44°F), with highs reaching up to 23°C (73°F) and lows dropping to around -12°C (11°F).
JanFebMarAprMayJunJulAugSepOctNovDec394450576773767571614743
Data source: Temperature data for Grimsley 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 Grimsley

In Grimsley in December, the precipitation amount is 146 mm (5.7 in) spread over 11 days.

December Precipitation Trends in Grimsley

The chart displays monthly precipitation patterns in Grimsley, 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 Grimsley, December typically receives around 146 mm (5.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec10319015715914513715415411613373146
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Grimsley

In Grimsley in December humidity is 88%. With an average temperature of 6°C (44°F), this humidity feels like a damp chill that seeps into your bones, making outdoor adventures less inviting and requiring warm, layered clothing to stay comfortable while exploring.

December Average Humidity in Grimsley

This chart illustrates the average monthly humidity levels in Grimsley, 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 Grimsley is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%82%83%83%80%74%71%78%88%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Grimsley

In Grimsley in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Grimsley, you can check the information here.

Maximum UV Index Levels in Grimsley for December

The chart shows the monthly maximum UV Index (UVI) for Grimsley 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 Grimsley typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710111111109753
Data source: Grimsley 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 Grimsley Compares to Other Months

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

This table compares monthly weather conditions in Grimsley, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)103 mm (4.0 inches)87%moderate
February Weather7°C (44°F)190 mm (7.5 inches)86%high
March Weather10°C (51°F)157 mm (6.2 inches)86%high
April Weather14°C (57°F)159 mm (6.3 inches)82%very high
May Weather20°C (68°F)145 mm (5.7 inches)82%extreme
June Weather23°C (73°F)137 mm (5.4 inches)83%extreme
July Weather25°C (77°F)154 mm (6.1 inches)80%extreme
August Weather24°C (75°F)154 mm (6.1 inches)74%very high
September Weather21°C (71°F)116 mm (4.6 inches)71%very high
October Weather16°C (61°F)133 mm (5.2 inches)78%high
November Weather8°C (47°F)73 mm (2.9 inches)88%moderate
December Weather6°C (44°F)146 mm (5.7 inches)88%moderate

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