December weather forecastRed Bluff, CA
December
Weather in December
December, the first month of the winter in Red Bluff, is still a cool month, with an average temperature ranging between max 52.7°F (11.5°C) and min 39.6°F (4.2°C).Temperature
December, having an average high-temperature of 52.7°F (11.5°C) and an average low-temperature of 39.6°F (4.2°C), is the coldest month.Humidity
In December, the average relative humidity in Red Bluff is 68%.Rainfall
The months with the most rainfall are March and December, with an average 3.27" (83mm) of precipitation.Snowfall
February and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.1 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 0.4 snowfall days, and 0.2" (5mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:12 am and sunset at 4:43 pm. On the last day of December, in Red Bluff, sunrise is at 7:31 am and sunset at 4:53 pm PST.
Sunshine
January and December, with an average of 5.8h of sunshine, are months with the least sunshine in Red Bluff.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 3 in December translates into these instructions:
Exercise prevention - Protecting skin and eyes from harm is required. To avoid the Sun's strongest rays, limit exposure around the mid-day period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Red Bluff, CA
- Average high temperature in December: 52.7°F
The warmest month (with the highest average high temperature) is July (95.9°F).
The month with the lowest average high temperature is December (52.7°F).
- Average low temperature in December: 39.6°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is December (39.6°F).
Average pressure in December
Red Bluff, CA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, July and August (29.91"Hg).
Average wind speed in December
Red Bluff, CA
- Average wind speed in December: 5.3mph
The windiest month (with the highest average wind speed) is March (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Red Bluff, CA
- Average humidity in December: 68%
The month with the highest relative humidity is March (71%).
The months with the lowest relative humidity are July and August (31%).
Average rainfall in December
Red Bluff, CA
- Average rainfall in December: 3.27"
The wettest months (with the highest rainfall) are March and December (3.27").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in December
Red Bluff, CA
- Average rainfall days in December: 12 days
The month with the highest number of rainy days is March (14 days).
The month with the least rainy days is August (1.1 days).
Average snowfall in December
Red Bluff, CA
- Average snowfall in December: 0.08"
The month with the highest snowfall is February (0.12").
The months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Red Bluff, CA
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Red Bluff, CA
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 48min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 5h and 48min).
Average sunshine days in December
Red Bluff, CA
- Average sunshine days in December: 17.9 days
The month with the most sunshine days is August (28.4 days).
The month with the least sunshine days is March (15.3 days).
Average UV index in December
Red Bluff, CA
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Red Bluff, CA
- Average cloud cover in December: 36
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Red Bluff, CA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
