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December Weather in Grass Lake, United States

Last updated: June 24, 2025

In Grass Lake, United States, the average temperature in December hovers around 0°C (33°F). This chilly month can see temperatures dip as low as -24°C (-10°F), while the mercury may rise to a pleasant 16°C (61°F) at times. Expect some moisture, with 54 mm (2.1 in) of precipitation over 9 days. Additionally, brace yourself for a high average humidity of 86%, making it feel even cooler.

December Temperature in Grass Lake

In December in Grass Lake, the average temperature is 0°C (33°F). Maximum temperatures can reach 16°C (61°F), while minimums can drop as low as -24°C (-10°F). Be prepared for a wide range of temperatures during your travels, and pack accordingly!

December Weather in Grass Lake: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Grass Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grass Lake, December typically has an average temperature of 0°C (33°F), with highs reaching up to 16°C (61°F) and lows dropping to around -24°C (-10°F).
JanFebMarAprMayJunJulAugSepOctNovDec262737476070747265543932
Data source: Temperature data for Grass Lake 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 Grass Lake

In Grass Lake in December, the precipitation amount is 54 mm (2.1 in) over a span of 9 days.

December Precipitation Trends in Grass Lake

The chart displays monthly precipitation patterns in Grass Lake, 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 Grass Lake, December typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec656978921238410165741097554
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Grass Lake

In Grass Lake in December humidity is 86%. With an average temperature of 0°C (33°F), this humidity feels like a damp chill that permeates your clothes, making traveling uncomfortable and necessitating warm, layered clothing to stay dry and cozy.

December Average Humidity in Grass Lake

This chart illustrates the average monthly humidity levels in Grass Lake, 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 Grass Lake is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Grass Lake

In Grass Lake 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 Grass Lake, you can visit Hourly UV Index in Grass Lake.

Maximum UV Index Levels in Grass Lake for December

The chart shows the monthly maximum UV Index (UVI) for Grass Lake 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 Grass Lake typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24599101097542
Data source: Grass Lake 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 Grass Lake Compares to Other Months

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

This table compares monthly weather conditions in Grass Lake, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)65 mm (2.6 inches)88%low
February Weather-3°C (28°F)69 mm (2.7 inches)87%moderate
March Weather3°C (38°F)78 mm (3.1 inches)85%moderate
April Weather8°C (47°F)92 mm (3.6 inches)86%very high
May Weather15°C (60°F)123 mm (4.8 inches)80%very high
June Weather21°C (70°F)84 mm (3.3 inches)80%very high
July Weather24°C (75°F)101 mm (4.0 inches)80%very high
August Weather22°C (72°F)65 mm (2.6 inches)80%very high
September Weather19°C (66°F)74 mm (2.9 inches)80%high
October Weather12°C (54°F)109 mm (4.3 inches)84%moderate
November Weather4°C (39°F)75 mm (3.0 inches)89%moderate
December Weather0°C (33°F)54 mm (2.1 inches)86%low

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