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December Weather in Calimesa, United States

Last updated: June 24, 2025

In December, the average temperature in Calimesa, United States hovers around 9°C (49°F). Expect a wide range of temperatures, with minimums plummeting to -5°C (24°F) and maximums reaching up to 25°C (77°F). During this period, precipitation measures about 59 mm (2.3 in) over approximately 5 days, while average humidity remains comfortably high at 74%.

December Temperature in Calimesa

In December in Calimesa, the average temperature is 9°C (49°F). The maximum can reach 25°C (77°F), and the minimum can be as low as -5°C (24°F). Be prepared for a wide range of temperatures when traveling to Calimesa in December.

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

The chart illustrates December temperature patterns in Calimesa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Calimesa, December typically has an average temperature of 9°C (49°F), with highs reaching up to 25°C (77°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec494951586272787873645749
Data source: Temperature data for Calimesa 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 Calimesa

In Calimesa in December, the precipitation amount is 59 mm (2.3 in) over the course of 5 days.

December Precipitation Trends in Calimesa

The chart displays monthly precipitation patterns in Calimesa, 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 Calimesa, December typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec62675726164141110112459
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Calimesa

In Calimesa in December humidity is 74%. With an average temperature of 9°C (49°F), this humidity feels like a chilly embrace that can make outdoor activities somewhat uncomfortable; travelers may find themselves needing to dress in layers to stay warm while also coping with the dampness in the air.

December Average Humidity in Calimesa

This chart illustrates the average monthly humidity levels in Calimesa, 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 Calimesa is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%77%67%56%46%48%46%42%52%58%66%74%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Calimesa

In Calimesa in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Calimesa for better planning.

Maximum UV Index Levels in Calimesa for December

The chart shows the monthly maximum UV Index (UVI) for Calimesa 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 Calimesa typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469101112121110854
Data source: Calimesa 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 Calimesa Compares to Other Months

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

This table compares monthly weather conditions in Calimesa, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)62 mm (2.4 inches)72%moderate
February Weather9°C (49°F)66 mm (2.6 inches)77%high
March Weather11°C (52°F)57 mm (2.3 inches)67%very high
April Weather15°C (59°F)26 mm (1.0 inches)56%very high
May Weather17°C (62°F)15 mm (0.6 inches)46%extreme
June Weather22°C (72°F)3 mm (0.1 inches)48%extreme
July Weather25°C (78°F)13 mm (0.5 inches)46%extreme
August Weather25°C (78°F)10 mm (0.4 inches)42%extreme
September Weather23°C (73°F)10 mm (0.4 inches)52%very high
October Weather18°C (64°F)11 mm (0.4 inches)58%very high
November Weather14°C (57°F)23 mm (0.9 inches)66%moderate
December Weather9°C (49°F)59 mm (2.3 inches)74%moderate

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