January weather forecast and climate
San Quentin, CA

Weather in January

January, like December, is a moderate winter month in San Quentin, California, with average temperature varying between 45.5°F (7.5°C) and 56.1°F (13.4°C).

Temperature

In January, the average high-temperature is practically the same as in December - a still moderate 56.1°F (13.4°C). In January, in San Quentin, the average low-temperature is 45.5°F (7.5°C).

Humidity

In San Quentin, the average relative humidity in January is 74%.

Rainfall

In January, the rain falls for 5.9 days. Throughout January, 0.59" (15mm) of precipitation is accumulated. Throughout the year, in San Quentin, there are 48 rainfall days, and 3.94" (100mm) of precipitation is accumulated.

Daylight

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

Sunshine

In San Quentin, California, the average sunshine is 5.7h.

UV index

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate health risk from the 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 the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in January in San Quentin?

In January, in San Quentin, California, the average high-temperature is 56.1°F (13.4°C), and the average low-temperature is 45.5°F (7.5°C).

What is the average humidity in January in San Quentin?

In January, the average relative humidity is 74%.

How much does it rain in San Quentin in January?

In San Quentin, in January, it is raining for 5.9 days, with typically 0.59" (15mm) of accumulated precipitation.

How many hours of daylight does San Quentin have in January?

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

How many hours of sunshine does San Quentin have in January?

In San Quentin, the average sunshine in January is 5.7h.

What is the month with the lowest UV index in San Quentin?

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

How high is the UV index in January in San Quentin?

The average daily maximum UV index in January is 3. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to the Sun's UV rays.

Average temperature in January
San Quentin, CA

Average temperature in January - San Quentin, CA
  • Average high temperature in January: 56.1°F

The warmest month (with the highest average high temperature) is September (72.3°F).
The month with the lowest average high temperature is December (55.4°F).

  • Average low temperature in January: 45.5°F

The month with the highest average low temperature is September (56.1°F).
The coldest month (with the lowest average low temperature) is December (45.3°F).

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Average pressure in January
San Quentin, CA

Average pressure in January - San Quentin, 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
San Quentin, CA

Average wind speed in January - San Quentin, CA
  • Average wind speed in January: 6mph

The windiest month (with the highest average wind speed) is May (7.8mph).
The calmest months (with the lowest average wind speed) are October and November (5.5mph).

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Average humidity in January
San Quentin, CA

Average humidity in January - San Quentin, CA
  • Average humidity in January: 74%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (68%).

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Average rainfall in January
San Quentin, CA

Average rainfall in January - San Quentin, CA
  • Average rainfall in January: 0.59"

The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are June, July, August and September (0.04").

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Average rainfall days in January
San Quentin, CA

Average rainfall days in January - San Quentin, CA
  • Average rainfall days in January: 5.9 days

The month with the highest number of rainy days is March (8.8 days).
Months with the least rainy days are June and August (1.2 days).

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Average daylight in January /
Average sunshine in January
San Quentin, CA

Average daylight in January / Average sunshine in January - San Quentin, 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: 5.7h

The month with the most sunshine is July (Average sunshine: 11.2h).
The month with the least sunshine is December (Average sunshine: 5.5h).

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Average sunshine days in January
San Quentin, CA

Average sunshine days in January - San Quentin, CA
  • Average sunshine days in January: 24.2 days

The month with the most sunshine days is June (26.4 days).
The month with the least sunshine days is March (20.7 days).

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Average UV index in January
San Quentin, CA

Average UV index in January - San Quentin, CA
  • Average UV index in January: 3

Months with the highest UV index are April, 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
San Quentin, CA

Average cloud cover in January - San Quentin, CA
  • Average cloud cover in January: 36

The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).

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Average visibility in January
San Quentin, CA

Average visibility in January - San Quentin, 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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