January weather forecast and climate
Brentwood, CA

Scenic and organized home community in Brentwood City, California
Scenic and organized home community in Brentwood City, California

Weather in January

January is a mild winter month in Brentwood, California, with average temperature varying between 41.5°F (5.3°C) and 56.1°F (13.4°C).

Temperature

In January, the average high-temperature is almost the same as in December - a moderate 56.1°F (13.4°C). In January, the average low-temperature is 41.5°F (5.3°C).

Humidity

With an average relative humidity of 74%, January is the most humid month.

Rainfall

In Brentwood, it is raining for 8.6 days, with typically 1.89" (48mm) of accumulated precipitation. Throughout the year, in Brentwood, there are 62 rainfall days, and 10.16" (258mm) of precipitation is accumulated.

Snowfall

In Brentwood snow does not fall through November.

Daylight

In January, the average length of the day in Brentwood is 9.9h.

Sunshine

The average sunshine in Brentwood is 6h.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: In January, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in January in Brentwood?

In Brentwood, California, in January, the average high-temperature is 56.1°F (13.4°C), and the average low-temperature is 41.5°F (5.3°C).

What is the most humid month in Brentwood?

January is the most humid month in Brentwood, California, with an average relative humidity of 74%.

What is the average humidity in January in Brentwood?

In January, the average relative humidity in Brentwood, California, is 74%.

How much does it rain in Brentwood in January?

In January, in Brentwood, California, the rain falls for 8.6 days. Throughout January, 1.89" (48mm) of precipitation is accumulated.

Does it snow in Brentwood in January?

In January, in Brentwood, it doesn't snow. December is the latest month when it typically snows.

When it does not snow in Brentwood?

January through November are months without snowfall in Brentwood.

How many hours of daylight does Brentwood have in January?

In January, the average length of the day in Brentwood, California, is 9.9h.

How long on average sun shines in January in Brentwood?

In January, the average sunshine in Brentwood is 6h.

When is the lowest UV index in Brentwood?

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Brentwood.

What is the UV index reading in January in Brentwood?

The average daily maximum UV index in January in Brentwood, California, is 3. A UV Index value of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV radiation.

Average temperature in January
Brentwood, CA

Average temperature in January - Brentwood, CA
  • Average high temperature in January: 13.4°C

The warmest month (with the highest average high temperature) is July (31.4°C).
The month with the lowest average high temperature is December (12.8°C).

  • Average low temperature in January: 5.3°C

The month with the highest average low temperature is September (14.3°C).
The coldest month (with the lowest average low temperature) is January (5.3°C).

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Average pressure in January
Brentwood, CA

Average pressure in January - Brentwood, CA
  • Average pressure in January: 1020.6mbar

The month with the highest atmospheric pressure is January (1020.6mbar).
The month with the lowest atmospheric pressure is June (1012.9mbar).

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Average wind speed in January
Brentwood, CA

Average wind speed in January - Brentwood, CA
  • Average wind speed in January: 7.3km/h

The windiest month (with the highest average wind speed) is June (12.5km/h).
The calmest months (with the lowest average wind speed) are January and November (7.3km/h).

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Average humidity in January
Brentwood, CA

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%).

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Average rainfall in January
Brentwood, CA

Average rainfall in January - Brentwood, CA
  • Average rainfall in January: 48mm

The wettest month (with the highest rainfall) is February (53mm).
The driest months (with the least rainfall) are July and August (1mm).

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Average rainfall days in January
Brentwood, CA

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).

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Average snowfall days in January
Brentwood, CA

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).
Months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

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Average daylight in January /
Average sunshine in January
Brentwood, CA

Average daylight in January / Average sunshine in January - Brentwood, CA
  • Average daylight in January: 9.9h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in January: 6h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.8h).

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Average sunshine days in January
Brentwood, CA

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).

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Average UV index in January
Brentwood, CA

Average UV index in January - Brentwood, CA
  • Average UV index in January: 3

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in January
Brentwood, CA

Average cloud cover in January - Brentwood, CA
  • Average cloud cover in January: 34

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).

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Average visibility in January
Brentwood, CA

Average visibility in January - Brentwood, CA
  • Average visibility in January: 9km

Months with the highest visibility are May, June, July, August, September, October and November (10km).
Months with the lowest visibility are January, February, March, April and December (9km).

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