December weather forecastBarstow, CA
December
Weather in December
The first month of the winter, December, is also a fresh month in Barstow, California, with temperature in the range of an average high of 54.3°F (12.4°C) and an average low of 38.7°F (3.7°C).Temperature
December is the coldest month, exhibiting average temperatures of 54.3°F (12.4°C) at the peak and 38.7°F (3.7°C) at the base.Humidity
January and December, with an average relative humidity of 48%, are the most humid months.Rainfall
The month with the most rainfall is December, when the rain falls for 5.6 days and typically aggregates up to 0.55" (14mm) of precipitation.Snowfall
February through October and December are months without snowfall.Daylight
December has the shortest days of the year in Barstow, with an average of 9h and 54min of daylight.On the first day of December, sunrise is at 6:38 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 4:47 pm PST.
Sunshine
In Barstow, the average sunshine in December is 7.2h.UV index
The months with the lowest UV index are November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the average maximum UV index of 3 translates into the following recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Barstow, CA
- Average high temperature in December: 54.3°F
The warmest month (with the highest average high temperature) is July (96.4°F).
The month with the lowest average high temperature is December (54.3°F).
- Average low temperature in December: 38.7°F
The month with the highest average low temperature is August (72.9°F).
The coldest month (with the lowest average low temperature) is December (38.7°F).
Average pressure in December
Barstow, CA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).
Average wind speed in December
Barstow, CA
- Average wind speed in December: 6.8mph
The windiest month (with the highest average wind speed) is May (12.6mph).
The calmest month (with the lowest average wind speed) is January (6.3mph).
Average humidity in December
Barstow, CA
- Average humidity in December: 48%
The months with the highest relative humidity are January and December (48%).
The month with the lowest relative humidity is August (23%).
Average rainfall in December
Barstow, CA
- Average rainfall in December: 0.55"
The wettest month (with the highest rainfall) is December (0.55").
The driest month (with the least rainfall) is June (0").
Average rainfall days in December
Barstow, CA
- Average rainfall days in December: 5.6 days
The month with the highest number of rainy days is December (5.6 days).
The month with the least rainy days is June (0.2 days).
Average snowfall in December
Barstow, CA
- Average snowfall in December: 0"
The month with the highest snowfall is November (0.39").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and December (0").
Average snowfall days in December
Barstow, CA
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Barstow, CA
- Average daylight in December: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 7h and 12min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 7h and 6min).
Average sunshine days in December
Barstow, CA
- Average sunshine days in December: 24.8 days
The month with the most sunshine days is June (29.8 days).
The month with the least sunshine days is February (22.8 days).
Average UV index in December
Barstow, CA
- Average UV index in December: 3
The month with the highest UV index is July (UV index 8).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in December
Barstow, CA
- Average cloud cover in December: 19
The month with the most cloud cover is December (Cloud cover 19).
The months with the least cloud cover are June, August and September (Cloud cover 5).
Average visibility in December
Barstow, 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).
