Monthly weather forecast and climate
Fairfax, CA

Weather in January

January in Fairfax, California, is a moderate winter month, with temperature in the range of an average high of 55.9°F (13.3°C) and an average low of 46.6°F (8.1°C). In January, the average high-temperature is relatively the same as in December - a mild 55.9°F (13.3°C). Weather in January »

Weather in February

The last month of the winter, February, is also a moderate month in Fairfax, California, with average temperature ranging between min 46.8°F (8.2°C) and max 57.4°F (14.1°C). In February, the average high-temperature is practically the same as in January - a still moderate 57.4°F (14.1°C). Weather in February »

Weather in March

March, the first month of the spring, in Fairfax, is also a moderate month, with temperature in the range of an average high of 59.2°F (15.1°C) and an average low of 47.8°F (8.8°C). In Fairfax, the average high-temperature is practically the same as in February - a still moderate 59.2°F (15.1°C). Weather in March »

Weather in April

April is a comfortable spring month in Fairfax, California, with temperature in the range of an average low of 48.7°F (9.3°C) and an average high of 61.7°F (16.5°C). In Fairfax, the average high-temperature in April is relatively the same as in March - a comfortable 61.7°F (16.5°C). Weather in April »

Weather in May

May, the last month of the spring, in Fairfax, is another comfortable month, with average temperature fluctuating between 50.7°F (10.4°C) and 63.3°F (17.4°C). In Fairfax, the average high-temperature is practically the same as in April - a still enjoyable 63.3°F (17.4°C). Weather in May »

Weather in June

June, the first month of the summer, in Fairfax, is still a comfortable month, with average temperature varying between 53.8°F (12.1°C) and 67.8°F (19.9°C). In Fairfax, the average high-temperature in June is essentially the same as in May - a still enjoyable 67.8°F (19.9°C). Weather in June »

Weather in July

July in Fairfax, California, is a pleasant summer month, with average temperature ranging between max 68.5°F (20.3°C) and min 54.9°F (12.7°C). In July, the average high-temperature is practically the same as in June - an agreeable 68.5°F (20.3°C). Weather in July »

Weather in August

August, the last month of the summer, in Fairfax, is another pleasant month, with temperature in the range of an average high of 69.4°F (20.8°C) and an average low of 56.1°F (13.4°C). In Fairfax, the average high-temperature is practically the same as in July - a still agreeable 69.4°F (20.8°C). Weather in August »

Weather in September

September, the first month of the autumn, in Fairfax, is still a pleasant month, with average temperature ranging between min 56.3°F (13.5°C) and max 70.9°F (21.6°C). The warmest month is September, with an average high-temperature of 70.9°F (21.6°C) and an average low-temperature of 56.3°F (13.5°C). Weather in September »

Weather in October

October, like September, in Fairfax, California, is another enjoyable autumn month, with average temperature fluctuating between 54.7°F (12.6°C) and 67.5°F (19.7°C). In Fairfax, California, the average high-temperature is relatively the same as in September - a comfortable 67.5°F (19.7°C). Weather in October »

Weather in November

November, the last month of the autumn, in Fairfax, is another comfortable month, with temperature in the range of an average high of 61.2°F (16.2°C) and an average low of 50.2°F (10.1°C). In November, the average high-temperature slightly decreases, from a comfortable 67.5°F (19.7°C) in October, to a still enjoyable 61.2°F (16.2°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cool month in Fairfax, California, with average temperature fluctuating between 46°F (7.8°C) and 55.2°F (12.9°C). The coldest month is December, with an average high-temperature of 55.2°F (12.9°C) and an average low-temperature of 46°F (7.8°C). Weather in December »
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FAQ

How many days does it rain in Fairfax?

In Fairfax, California, during the entire year, the rain falls for 80.3 days and collects up to 15.98" (406mm) of precipitation.

How many days does it snow in Fairfax?

In Fairfax, California, during the entire year, snow falls for 0.1 days.

When it does not snow in Fairfax?

In Fairfax snow does not fall in January through November.

What is the rainiest month in Fairfax?

February is the month with the most rainfall. Rain falls for 8.9 days and accumulates 3.43" (87mm) of precipitation.

What are the months with the lowest UV index in Fairfax?

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

When are the longest days in Fairfax?

The month with the longest days in Fairfax is June, with an average of 14.8h of daylight.

What is the month with the highest UV index in Fairfax?

Months with the highest UV index in Fairfax, California, are June through September, with an average maximum UV index of 5.

What is the driest month in Fairfax?

Months with the least rainfall in Fairfax are July and August Rain falls for 2.3 days and accumulates 0.08" (2mm) of rain.

What month has the most sunshine in Fairfax?

The month with the most sunshine is July, with an average of 11.2h of sunshine.

What is the most humid month in Fairfax?

August is the most humid month in Fairfax, with an average relative humidity of 78%.

What is the warmest month in Fairfax?

September is the warmest month, with an average high-temperature of 70.9°F (21.6°C) and an average low-temperature of 56.3°F (13.5°C).

What is the least humid month in Fairfax?

October is the least humid month in Fairfax, California, with an average relative humidity of 69%.

What is the coldest month in Fairfax?

With an average high-temperature of 55.2°F (12.9°C) and an average low-temperature of 46°F (7.8°C), December is the coldest month.

When does it snow in Fairfax?

The only month with snowfall is December.

When does it snow the most in Fairfax?

December has the most snowfall days of the year. Snow falls for 0.1 days.

What is the month with the shortest days in Fairfax?

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

What is the month with the least sunshine in Fairfax?

December has the least sunshine of the year, with an average of 5.6h of sunshine.

Average temperature
Fairfax, CA

Average temperature - Fairfax, CA

The warmest month (with the highest average high temperature) is September (70.9°F).
The month with the lowest average high temperature is December (55.2°F).

The month with the highest average low temperature is September (56.3°F).
The coldest month (with the lowest average low temperature) is December (46°F).

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Average pressure
Fairfax, CA

Average pressure - Fairfax, 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
Fairfax, CA

Average wind speed - Fairfax, CA

The windiest months (with the highest average wind speed) are April and May (8.3mph).
The calmest month (with the lowest average wind speed) is November (5.9mph).

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Average rainfall
Fairfax, CA

Average rainfall - Fairfax, CA

The wettest month (with the highest rainfall) is February (3.43").
The driest months (with the least rainfall) are July and August (0.08").

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Average rainfall days
Fairfax, CA

Average rainfall days - Fairfax, CA

The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is July (2.3 days).

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Average snowfall days
Fairfax, CA

Average snowfall days - Fairfax, CA

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 / Average sunshine
Fairfax, CA

Average daylight / Average sunshine - Fairfax, 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: 5.6h).

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Average sunshine days
Fairfax, CA

Average sunshine days - Fairfax, CA

Months with the most sunshine days are June and July (24.8 days).
The month with the least sunshine days is March (16.6 days).

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Average UV index
Fairfax, CA

Average UV index - Fairfax, CA

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

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Average visibility
Fairfax, CA

Average visibility - Fairfax, 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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