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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 3°C (38°F), with minimum lows plunging to -14°C (8°F) and highs reaching up to 12°C (54°F). Expect 271 mm (10.7 in) of precipitation over approximately 19 days, and prepare for a damp experience with an average humidity level of 89%.

December Temperature in Clear Lake

In December in Clear Lake, the average temperature is 3°C (38°F), with maximums reaching up to 12°C (54°F) and minimums dropping as low as -14°C (8°F). It's advisable for travelers to pack warm clothing and be prepared for chilly conditions during this time.

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 3°C (38°F), with highs reaching up to 12°C (54°F) and lows dropping to around -14°C (8°F).
JanFebMarAprMayJunJulAugSepOctNovDec383641475459636459494338
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 271 mm (10.7 in) over the course of 19 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 271 mm (10.7 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec23624419114683753126146229313271
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 89%. With an average temperature of 3°C (38°F), this humidity feels like a chilly blanket wrapping around you, making travel uncomfortable as the dampness seeps into your clothes and lingers in the air, leaving you feeling cold and clammy.

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 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%88%86%82%82%85%77%76%88%88%89%
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.
JanFebMarAprMayJunJulAugSepOctNovDec235689987522
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 Weather3°C (38°F)236 mm (9.3 inches)87%low
February Weather2°C (36°F)244 mm (9.6 inches)86%moderate
March Weather5°C (42°F)191 mm (7.5 inches)88%moderate
April Weather8°C (47°F)146 mm (5.8 inches)86%high
May Weather12°C (54°F)82 mm (3.2 inches)82%very high
June Weather15°C (59°F)75 mm (3.0 inches)82%very high
July Weather17°C (63°F)31 mm (1.2 inches)85%very high
August Weather18°C (64°F)26 mm (1.0 inches)77%very high
September Weather15°C (59°F)146 mm (5.8 inches)76%high
October Weather9°C (49°F)229 mm (9.0 inches)88%moderate
November Weather6°C (43°F)312 mm (12.3 inches)88%low
December Weather3°C (38°F)271 mm (10.7 inches)89%low

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