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December Weather in Clear Lake, United States

Last updated: June 24, 2025

In December, the average temperature in Clear Lake, United States hovers around -6°C (22°F), with minimum lows plunging to -31°C (-24°F) and highs reaching up to 14°C (57°F). Expect approximately 60 mm (2.3 in) of precipitation over about 8 days, coupled with an average humidity of 85%. Stay warm and prepared for the chill!

December Temperature in Clear Lake

In December in Clear Lake, the average temperature is -6°C (22°F), with maximums reaching 14°C (57°F) and minimums dropping as low as -31°C (-24°F). Travelers should be prepared for extremely cold conditions and sudden temperature fluctuations.

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

The chart illustrates December temperature patterns in Clear Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clear Lake, 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 -31°C (-24°F).
JanFebMarAprMayJunJulAugSepOctNovDec151632425769726962473222
Data source: Temperature data for Clear 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 Clear Lake

In Clear Lake in December, the precipitation amount is 60 mm (2.3 in) over a span of 8 days.

December Precipitation Trends in Clear Lake

The chart displays monthly precipitation patterns in Clear 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 Clear Lake, December typically receives around 60 mm (2.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec283956901351101051251021014160
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Clear Lake

In Clear Lake in December humidity is 85%. With an average temperature of -6°C (22°F), this humidity feels like an icy mist clinging to your skin, making outdoor activities uncomfortably chilly and causing your breath to cloud in the cold air, leaving you yearning for warmth and cozy indoor retreats while traveling.

December Average Humidity in Clear Lake

This chart illustrates the average monthly humidity levels in Clear 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 Clear Lake is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%89%86%85%79%80%80%78%80%84%89%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Clear Lake

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

Maximum UV Index Levels in Clear Lake for December

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

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

This table compares monthly weather conditions in Clear Lake, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)28 mm (1.1 inches)88%low
February Weather-9°C (16°F)39 mm (1.5 inches)89%moderate
March Weather0°C (32°F)56 mm (2.2 inches)86%moderate
April Weather6°C (42°F)90 mm (3.5 inches)85%high
May Weather14°C (58°F)135 mm (5.3 inches)79%very high
June Weather21°C (69°F)110 mm (4.3 inches)80%very high
July Weather22°C (73°F)105 mm (4.1 inches)80%very high
August Weather20°C (69°F)125 mm (4.9 inches)78%very high
September Weather17°C (63°F)102 mm (4.0 inches)80%high
October Weather8°C (47°F)101 mm (4.0 inches)84%moderate
November Weather0°C (32°F)41 mm (1.6 inches)89%moderate
December Weather-6°C (22°F)60 mm (2.3 inches)85%low

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