Monthly 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). In January, the average high-temperature is practically the same as in December - a still moderate 56.1°F (13.4°C). Weather in January »

Weather in February

February, the last month of the winter, in San Quentin, is another mild month, with average temperature ranging between max 57.9°F (14.4°C) and min 45.9°F (7.7°C). In February, the average high-temperature is relatively the same as in January - a still moderate 57.9°F (14.4°C). Weather in February »

Weather in March

March, the first month of the spring, in San Quentin, is still a mild month, with average temperature varying between 59.4°F (15.2°C) and 46.9°F (8.3°C). In San Quentin, the average high-temperature is relatively the same as in February - a still moderate 59.4°F (15.2°C). Weather in March »

Weather in April

April in San Quentin, California, is a comfortable spring month, with temperature in the range of an average high of 62.8°F (17.1°C) and an average low of 48.6°F (9.2°C). In San Quentin, the average high-temperature in April is almost the same as in March - an enjoyable 62.8°F (17.1°C). Weather in April »

Weather in May

The last month of the spring, May, is another comfortable month in San Quentin, California, with average temperature ranging between min 50.4°F (10.2°C) and max 64.9°F (18.3°C). In San Quentin, the average high-temperature is almost the same as in April - a still enjoyable 64.9°F (18.3°C). Weather in May »

Weather in June

The first month of the summer, June, is an agreeable month in San Quentin, California, with average temperature fluctuating between 69.1°F (20.6°C) and 53.2°F (11.8°C). In San Quentin, the average high-temperature is essentially the same as in May - a pleasant 69.1°F (20.6°C). Weather in June »

Weather in July

July, like June, is an agreeable summer month in San Quentin, California, with average temperature varying between 70.5°F (21.4°C) and 54.3°F (12.4°C). In San Quentin, the average high-temperature is relatively the same as in June - a still pleasant 70.5°F (21.4°C). Weather in July »

Weather in August

August, the last month of the summer, in San Quentin, is also an agreeable month, with temperature in the range of an average low of 55.4°F (13°C) and an average high of 71.2°F (21.8°C). In August, the average high-temperature is almost the same as in July - a still pleasant 71.2°F (21.8°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in San Quentin, California, with average temperature ranging between min 56.1°F (13.4°C) and max 72.3°F (22.4°C). September is the warmest month, with an average high-temperature of 72.3°F (22.4°C) and an average low-temperature of 56.1°F (13.4°C). Weather in September »

Weather in October

October, like September, is an agreeable autumn month in San Quentin, California, with average temperature varying between 68.9°F (20.5°C) and 54.3°F (12.4°C). In San Quentin, the average high-temperature is relatively the same as in September - a still pleasant 68.9°F (20.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is another comfortable month in San Quentin, California, with average temperature fluctuating between 61.5°F (16.4°C) and 49.6°F (9.8°C). In San Quentin, the average high-temperature marginally drops, from a pleasant 68.9°F (20.5°C) in October, to an enjoyable 61.5°F (16.4°C). Weather in November »

Weather in December

December, the first month of the winter, in San Quentin, is still a mild month, with temperature in the range of an average high of 55.4°F (13°C) and an average low of 45.3°F (7.4°C). The coldest month is December, with an average high-temperature of 55.4°F (13°C) and an average low-temperature of 45.3°F (7.4°C). Weather in December »
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FAQ

How much does it rain in San Quentin?

Throughout the year, in San Quentin, California, there are 48 rainfall days, and 3.94" (100mm) of precipitation is accumulated.

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.

What is the rainiest month in San Quentin?

The month with the most rainfall in San Quentin, California, is February when the rain falls for 5.3 days and typically aggregates up to 0.87" (22mm) of precipitation.

What is the most humid month in San Quentin?

The most humid month in San Quentin is March, with an average relative humidity of 77%.

When is the highest UV index in San Quentin?

Months with the highest UV index in San Quentin are April, June through September, with an average maximum UV index of 5.

What is the driest month in San Quentin?

June through September are months with the least rain in San Quentin when the rain falls for 1.2 days and typically aggregates up to 0.04" (1mm) of rain.

When are the longest days in San Quentin?

With an average of 14.8h of daylight, June has the longest days of the year.

What month has the most sunshine in San Quentin?

With an average of 11.2h of sunshine, July has the most sunshine of the year in San Quentin.

What is the warmest month in San Quentin?

With an average high-temperature of 72.3°F (22.4°C) and an average low-temperature of 56.1°F (13.4°C), September is the warmest month in San Quentin.

What is the least humid month in San Quentin?

With an average relative humidity of 68%, October is the least humid month in San Quentin.

What is the coldest month in San Quentin?

The coldest month in San Quentin is December, with an average high-temperature of 55.4°F (13°C) and an average low-temperature of 45.3°F (7.4°C).

What is the month with the shortest days in San Quentin?

With an average of 9.6h of daylight, December has the shortest days of the year in San Quentin.

What is the month with the least sunshine in San Quentin?

The month with the least sunshine is December, with an average of 5.5h of sunshine.

Average temperature
San Quentin, CA

Average temperature - San Quentin, CA

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).

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
San Quentin, CA

Average pressure - San Quentin, CA

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
San Quentin, CA

Average wind speed - San Quentin, CA

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 rainfall
San Quentin, CA

Average rainfall - San Quentin, CA

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
San Quentin, CA

Average rainfall days - San Quentin, CA

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 / Average sunshine
San Quentin, CA

Average daylight / Average sunshine - San Quentin, CA

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

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
San Quentin, CA

Average sunshine days - San Quentin, CA

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
San Quentin, CA

Average UV index - San Quentin, CA

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 visibility
San Quentin, CA

Average visibility - San Quentin, CA

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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