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December Weather in Caln, United States

Last updated: June 24, 2025

In December, the average temperature in Caln, United States hovers around 3°C (39°F), with a minimum dipping down to -12°C (11°F) and a maximum reaching up to 18°C (65°F). Expect approximately 103 mm (4.1 in) of precipitation spread over 10 days, accompanied by a notable average humidity of 84%.

December Temperature in Caln

In December in Caln, the average temperature is 3°C (39°F). The maximum can reach 18°C (65°F) while the minimum can drop to as low as -12°C (11°F). Travelers should be prepared for chilly weather and possible temperature fluctuations during this time.

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

The chart illustrates December temperature patterns in Caln, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Caln, December typically has an average temperature of 3°C (39°F), with highs reaching up to 18°C (65°F) and lows dropping to around -12°C (11°F).
JanFebMarAprMayJunJulAugSepOctNovDec343743536372787570604538
Data source: Temperature data for Caln 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 Caln

In Caln in December, the precipitation amount is 103 mm (4.1 in) over a span of 10 days.

December Precipitation Trends in Caln

The chart displays monthly precipitation patterns in Caln, 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 Caln, December typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec6710810710814111815115710910387103
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Caln

In Caln in December humidity is 84%. With an average temperature of 3°C (39°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and the air heavy, where every step feels like wading through a thick fog.

December Average Humidity in Caln

This chart illustrates the average monthly humidity levels in Caln, 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 Caln is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%81%78%79%74%72%75%81%85%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Caln

In Caln 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 Caln, you can visit Hourly UV Index in Caln.

Maximum UV Index Levels in Caln for December

The chart shows the monthly maximum UV Index (UVI) for Caln 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 Caln typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Caln 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 Caln Compares to Other Months

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

This table compares monthly weather conditions in Caln, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)67 mm (2.6 inches)84%moderate
February Weather3°C (38°F)108 mm (4.3 inches)83%moderate
March Weather6°C (43°F)107 mm (4.2 inches)83%high
April Weather12°C (54°F)108 mm (4.2 inches)81%very high
May Weather17°C (64°F)141 mm (5.5 inches)78%very high
June Weather22°C (73°F)118 mm (4.7 inches)79%very high
July Weather25°C (78°F)151 mm (5.9 inches)74%very high
August Weather24°C (75°F)157 mm (6.2 inches)72%very high
September Weather21°C (70°F)109 mm (4.3 inches)75%very high
October Weather15°C (60°F)103 mm (4.0 inches)81%high
November Weather7°C (45°F)87 mm (3.4 inches)85%moderate
December Weather3°C (39°F)103 mm (4.1 inches)84%low

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