Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
The transition into January reveals an average high-temperature of a refreshing 56.1°F (13.4°C), mirroring a close resemblance to December. January nights in Brentwood observe an average temperature dip to a wintry 41.5°F (5.3°C).Humidity
January is the most humid month in Brentwood, with an average relative humidity of 74%.Rainfall
In January, in Brentwood, the rain falls for 8.6 days. Throughout January, 1.89" (48mm) of precipitation is accumulated. Throughout the year, there are 62 rainfall days, and 10.16" (258mm) of precipitation is accumulated.Snowfall
January through November are months without snowfall.Daylight
In January, the average length of the day is 9h and 53min.On the first day of the month, sunrise is at 7:22 am and sunset at 4:58 pm. On the last day of January, in Brentwood, sunrise is at 7:11 am and sunset at 5:28 pm PST.
Sunshine
The average sunshine in January in Brentwood, California, is 6h.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Brentwood. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: During January, 3 as the daily maximum UV index converts into the following advice:
Make use of precautions - Suggestions to resist sunburn are communicated. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Brentwood in January?
What is the most humid month in Brentwood?
What is the average humidity in January in Brentwood?
How much does it rain in Brentwood in January?
When it does not snow in Brentwood?
Does it snow in Brentwood in January?
How many hours of daylight does Brentwood have in January?
When are sunrise and sunset in January in Brentwood?
How many hours of sunshine does Brentwood have in January?
What is the month with the lowest UV index in Brentwood?
How high is the UV index in January in Brentwood?
Average temperature in January
Brentwood, CA
- Average high temperature in January: 56.1°F
The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is December (55°F).
- Average low temperature in January: 41.5°F
The month with the highest average low temperature is September (57.7°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure in January
Brentwood, CA
- Average pressure in January: 30.14"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Brentwood, CA
- Average wind speed in January: 4.5mph
The windiest month (with the highest average wind speed) is June (7.8mph).
The calmest months (with the lowest average wind speed) are January and November (4.5mph).
Average humidity in January
Brentwood, CA
- Average humidity in January: 74%
The month with the highest relative humidity is January (74%).
The month with the lowest relative humidity is September (52%).
Average rainfall in January
Brentwood, CA
- Average rainfall in January: 1.89"
The wettest month (with the highest rainfall) is February (2.09").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in January
Brentwood, CA
- Average rainfall days in January: 8.6 days
The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is August (0.8 days).
Average snowfall days in January
Brentwood, CA
- Average snowfall days in January: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in January /
Average sunshine in January
Brentwood, CA
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January: 6h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in January
Brentwood, CA
- Average sunshine days in January: 21.8 days
The month with the most sunshine days is August (29.8 days).
The month with the least sunshine days is March (17.7 days).
Average UV index in January
Brentwood, CA
- Average UV index in January: 3
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in January
Brentwood, CA
- Average cloud cover in January: 34
The months with the most cloud cover are March and December (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in January
Brentwood, CA
- Average visibility in January: 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).
Brentwood, California, USA
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