January weather forecast and climate
Berkeley, CA

the neon-lit iconic Berkeley University Sather Tower in California
the neon-lit iconic Berkeley University Sather Tower in California

Weather in January

January, the same as December, in Berkeley, California, is another mild winter month, with average temperature varying between 56.3°F (13.5°C) and 44.2°F (6.8°C).

Temperature

In Berkeley, the average high-temperature is essentially the same as in December - a still moderate 56.3°F (13.5°C). The average low-temperature, in January, is 44.2°F (6.8°C).

Humidity

The average relative humidity in January is 73%.

Rainfall

In January, the rain falls for 7.6 days. Throughout January, 0.94" (24mm) of precipitation is accumulated. In Berkeley, California, during the entire year, the rain falls for 55.6 days and collects up to 5.24" (133mm) of precipitation.

Daylight

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

Sunshine

In January, the average sunshine in Berkeley, California, is 6.1h.

UV index

Months with the lowest UV index in Berkeley are January, February, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 3 in January interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in January in Berkeley?

The average high-temperature, in January, in Berkeley, is 56.3°F (13.5°C), while the average low-temperature is 44.2°F (6.8°C).

What is the average humidity in January in Berkeley?

In Berkeley, California, the average relative humidity in January is 73%.

How many days does it rain in January in Berkeley?

In Berkeley, California, in January, it is raining for 7.6 days, with typically 0.94" (24mm) of accumulated precipitation.

How many hours of daylight does Berkeley have in January?

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

How many hours of sunshine does Berkeley have in January?

The average sunshine in January in Berkeley, California, is 6.1h.

What is the month with the lowest UV index in Berkeley?

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

What is the UV index intensity in January in Berkeley?

In Berkeley, California, the average daily maximum UV index in January is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in January
Berkeley, CA

Average temperature in January - Berkeley, CA
  • Average high temperature in January: 56.3°F

The warmest month (with the highest average high temperature) is September (76.6°F).
The month with the lowest average high temperature is December (55.4°F).

  • Average low temperature in January: 44.2°F

The month with the highest average low temperature is September (56.8°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).

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Average pressure in January
Berkeley, CA

Average pressure in January - Berkeley, CA
  • Average pressure in January: 30.13"

The month with the highest atmospheric pressure is January (30.13").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed in January
Berkeley, CA

Average wind speed in January - Berkeley, CA
  • Average wind speed in January: 5.3mph

The windiest month (with the highest average wind speed) is May (7.3mph).
The calmest month (with the lowest average wind speed) is November (5mph).

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Average humidity in January
Berkeley, CA

Average humidity in January - Berkeley, CA
  • Average humidity in January: 73%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (64%).

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Average rainfall in January
Berkeley, CA

Average rainfall in January - Berkeley, CA
  • Average rainfall in January: 0.94"

The wettest month (with the highest rainfall) is February (1.1").
The driest months (with the least rainfall) are June, July, August and September (0.08").

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Average rainfall days in January
Berkeley, CA

Average rainfall days in January - Berkeley, CA
  • Average rainfall days in January: 7.6 days

The month with the highest number of rainy days is March (8.7 days).
The month with the least rainy days is August (1.5 days).

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

Average daylight in January / Average sunshine in January - Berkeley, 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: 6.1h

The month with the most sunshine is July (Average sunshine: 11.9h).
The month with the least sunshine is December (Average sunshine: 5.8h).

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Average sunshine days in January
Berkeley, CA

Average sunshine days in January - Berkeley, CA
  • Average sunshine days in January: 22.3 days

The month with the most sunshine days is October (26 days).
The month with the least sunshine days is February (20.5 days).

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Average UV index in January
Berkeley, CA

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

Months with the highest UV index are April, May, June, July, August and September (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in January
Berkeley, CA

Average cloud cover in January - Berkeley, CA
  • Average cloud cover in January: 33

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 11).

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Average visibility in January
Berkeley, CA

Average visibility in January - Berkeley, CA
  • Average visibility in January: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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