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December Weather in Klamath Falls, United States

Last updated: June 24, 2025

In December, the average temperature in Klamath Falls, United States hovers around 1°C (33°F), with fluctuations ranging from a minimum of -11°C (13°F) to a maximum of 13°C (56°F). This period also sees 66 mm (2.6 in) of precipitation over 11 days, contributing to an average humidity level of 88%. Embrace the cool, damp atmosphere that characterizes this time of year!

December Temperature in Klamath Falls

In December in Klamath Falls, the average temperature is 1°C (33°F). Maximum temperatures can reach 13°C (56°F), while minimums can drop to as low as -11°C (13°F). Travelers should prepare for chilly conditions and be ready for both mild and cold weather during this time.

December Weather in Klamath Falls: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Klamath Falls, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Klamath Falls, December typically has an average temperature of 1°C (33°F), with highs reaching up to 13°C (56°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec333439455463717061493933
Data source: Temperature data for Klamath Falls 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 Klamath Falls

In Klamath Falls in December, the precipitation amount is 66 mm (2.6 in) spread over 11 days.

December Precipitation Trends in Klamath Falls

The chart displays monthly precipitation patterns in Klamath Falls, 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 Klamath Falls, December typically receives around 66 mm (2.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec7983715447176625396066
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Klamath Falls

In Klamath Falls in December humidity is 88%. With an average temperature of 1°C (33°F), this humidity feels like a damp chill wrapping around you, making it difficult to stay warm while traveling, as each breath carries a heavy, cold moisture that clings to your skin.

December Average Humidity in Klamath Falls

This chart illustrates the average monthly humidity levels in Klamath Falls, 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 Klamath Falls is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%87%86%79%80%77%60%57%76%87%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Klamath Falls

In Klamath Falls in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Klamath Falls, you can check the information here.

Maximum UV Index Levels in Klamath Falls for December

The chart shows the monthly maximum UV Index (UVI) for Klamath Falls 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 Klamath Falls typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3479111111109643
Data source: Klamath Falls 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 Klamath Falls Compares to Other Months

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

This table compares monthly weather conditions in Klamath Falls, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)79 mm (3.1 inches)87%moderate
February Weather1°C (34°F)83 mm (3.3 inches)87%moderate
March Weather4°C (39°F)71 mm (2.8 inches)87%high
April Weather7°C (46°F)54 mm (2.1 inches)86%very high
May Weather12°C (54°F)46 mm (1.8 inches)79%extreme
June Weather17°C (63°F)17 mm (0.7 inches)80%extreme
July Weather22°C (72°F)6 mm (0.2 inches)77%extreme
August Weather21°C (71°F)6 mm (0.2 inches)60%very high
September Weather16°C (61°F)25 mm (1.0 inches)57%very high
October Weather9°C (49°F)39 mm (1.5 inches)76%high
November Weather4°C (40°F)60 mm (2.4 inches)87%moderate
December Weather1°C (33°F)66 mm (2.6 inches)88%moderate

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