nomadseason

December Weather in Red Bluff, United States

Last updated: June 24, 2025

In December, the average temperature in Red Bluff, United States hovers around 9°C (48°F). Typically, you can expect it to dip as low as -1°C (31°F) or rise to a pleasant 23°C (73°F). With an average precipitation amount of 101 mm (4.0 in) spread over about 11 days, the air feels notably humid, boasting an average humidity of 86%.

December Temperature in Red Bluff

In December in Red Bluff, the average temperature is 9°C (48°F). Maximum temperatures can reach 23°C (73°F), and minimums can dip as low as -1°C (31°F). Be prepared for a mix of mild days and chilly nights when traveling during this time.

December Weather in Red Bluff: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Red Bluff, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Red Bluff, December typically has an average temperature of 9°C (48°F), with highs reaching up to 23°C (73°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec485054616980868476655548
Data source: Temperature data for Red Bluff generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Red Bluff

In Red Bluff in December, the precipitation amount is 101 mm (4.0 in) spread over 11 days.

December Precipitation Trends in Red Bluff

The chart displays monthly precipitation patterns in Red Bluff, 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 Red Bluff, December typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec137127126593770183969101
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Red Bluff

In Red Bluff in December, humidity is 86%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that wraps around you, making outdoor activities uncomfortable and travel less enjoyable.

December Average Humidity in Red Bluff

This chart illustrates the average monthly humidity levels in Red Bluff, 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 Red Bluff is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%87%86%83%72%67%56%42%46%67%86%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Red Bluff

In Red Bluff 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 Red Bluff, you can visit Hourly UV Index in Red Bluff.

Maximum UV Index Levels in Red Bluff for December

The chart shows the monthly maximum UV Index (UVI) for Red Bluff 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 Red Bluff typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3478101110109642
Data source: Red Bluff 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 Red Bluff Compares to Other Months

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

This table compares monthly weather conditions in Red Bluff, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)137 mm (5.4 inches)86%moderate
February Weather10°C (51°F)127 mm (5.0 inches)87%moderate
March Weather12°C (54°F)126 mm (5.0 inches)86%high
April Weather16°C (61°F)59 mm (2.3 inches)83%very high
May Weather21°C (70°F)37 mm (1.5 inches)72%very high
June Weather26°C (80°F)7 mm (0.3 inches)67%extreme
July Weather30°C (86°F)0 mm (0.0 inches)56%very high
August Weather29°C (84°F)1 mm (0.0 inches)42%very high
September Weather24°C (76°F)8 mm (0.3 inches)46%very high
October Weather18°C (65°F)39 mm (1.5 inches)67%high
November Weather13°C (55°F)69 mm (2.7 inches)86%moderate
December Weather9°C (48°F)101 mm (4.0 inches)86%low

Compare Red Bluff's Climate with Cities Worldwide