Monthly weather forecast and climate
Fairfield, CA

Weather in January

January in Fairfield, California, is a mild winter month, with average temperature varying between 41.5°F (5.3°C) and 56.1°F (13.4°C). In January, the average high-temperature is relatively the same as in December - a mild 56.1°F (13.4°C). Weather in January »

Weather in February

February, the last month of the winter, in Fairfield, is also a moderate month, with average temperature fluctuating between 41.9°F (5.5°C) and 59.5°F (15.3°C). In Fairfield, the average high-temperature in February is essentially the same as in January - a still moderate 59.5°F (15.3°C). Weather in February »

Weather in March

The first month of the spring, March, is an enjoyable month in Fairfield, California, with temperature in the range of an average high of 62.8°F (17.1°C) and an average low of 43.3°F (6.3°C). In Fairfield, the average high-temperature is almost the same as in February - an enjoyable 62.8°F (17.1°C). Weather in March »

Weather in April

April in Fairfield, California, is an agreeable spring month, with average temperature ranging between max 68.7°F (20.4°C) and min 45.9°F (7.7°C). In April, the average high-temperature slightly increases, from a comfortable 62.8°F (17.1°C) in March, to a pleasant 68.7°F (20.4°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderately hot month in Fairfield, California, with average temperature varying between 49.8°F (9.9°C) and 74.8°F (23.8°C). In Fairfield, the average high-temperature in May slightly increases, from a pleasant 68.7°F (20.4°C) in April, to a moderately hot 74.8°F (23.8°C). Weather in May »

Weather in June

June, the first month of the summer, in Fairfield, is still a warm month, with average temperature varying between 55°F (12.8°C) and 83.7°F (28.7°C). In June, the average high-temperature marginally rises, from a moderately hot 74.8°F (23.8°C) in May, to a still warm 83.7°F (28.7°C). Weather in June »

Weather in July

July in Fairfield, California, is a tropical summer month, with average temperature ranging between min 56.1°F (13.4°C) and max 87.4°F (30.8°C). With an average high-temperature of 87.4°F (30.8°C) and an average low-temperature of 56.1°F (13.4°C), July is the warmest month. In July, the average heat index is appraised at a tropical 91.9°F (33.3°C). Weather in July »

Weather in August

The last month of the summer, August, is another tropical month in Fairfield, California, with average temperature varying between 57°F (13.9°C) and 86.7°F (30.4°C). In August, the average high-temperature is relatively the same as in July - a still hot 86.7°F (30.4°C). Weather in August »

Weather in September

September, the first month of the autumn, in Fairfield, is also a moderately hot month, with temperature in the range of an average low of 57.6°F (14.2°C) and an average high of 85.1°F (29.5°C). In Fairfield, the average high-temperature is almost the same as in August - a moderately hot 85.1°F (29.5°C). Weather in September »

Weather in October

October, like September, in Fairfield, California, is a moderately hot autumn month, with average temperature varying between 53.6°F (12°C) and 75.6°F (24.2°C). In October, the average high-temperature drops, from 85.1°F (29.5°C) in September, to a still moderately hot 75.6°F (24.2°C). Weather in October »

Weather in November

November, the last month of the autumn, in Fairfield, is another comfortable month, with average temperature varying between 63.3°F (17.4°C) and 46.4°F (8°C). In Fairfield, the average high-temperature in November drops, from a warm 75.6°F (24.2°C) in October, to a comfortable 63.3°F (17.4°C). Weather in November »

Weather in December

December, the first month of the winter, in Fairfield, is still a cool month, with average temperature ranging between min 41.7°F (5.4°C) and max 54.9°F (12.7°C). With an average high-temperature of 54.9°F (12.7°C) and an average low-temperature of 41.7°F (5.4°C), December is the coldest month. Weather in December »
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FAQ

How much does it rain in Fairfield?

Throughout the year, in Fairfield, there are 71.4 rainfall days, and 12.13" (308mm) of precipitation is accumulated.

When is the lowest UV index in Fairfield?

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

What is the rainiest month in Fairfield?

February is the month with the most rainfall. Rain falls for 9 days and accumulates 2.4" (61mm) of precipitation.

What is the most humid month in Fairfield?

The most humid month in Fairfield, California, is March, with an average relative humidity of 75%.

When are the longest days in Fairfield?

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

What are the months with the highest UV index in Fairfield?

Months with the highest UV index are June through August, with an average maximum UV index of 6.

What is the warmest month in Fairfield?

July is the warmest month, with an average high-temperature of 87.4°F (30.8°C) and an average low-temperature of 56.1°F (13.4°C).

What month has the most sunshine in Fairfield?

July has the most sunshine of the year, with an average of 12.1h of sunshine.

What is the driest month in Fairfield?

The only month without rainfall in Fairfield is August.

What is the least humid month in Fairfield?

With an average relative humidity of 52%, September is the least humid month in Fairfield.

When does it rain in Fairfield?

January through July, September through December are months with rainfall in Fairfield.

What is the coldest month in Fairfield?

December is the coldest month in Fairfield, California, with an average high-temperature of 54.9°F (12.7°C) and an average low-temperature of 41.7°F (5.4°C).

What is the month with the shortest days in Fairfield?

With an average of 9.5h of daylight, December has the shortest days of the year.

What is the month with the least sunshine in Fairfield?

December has the least sunshine of the year in Fairfield, with an average of 5.7h of sunshine.

Average temperature
Fairfield, CA

Average temperature - Fairfield, CA

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is December (54.9°F).

The month with the highest average low temperature is September (57.6°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

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Average pressure
Fairfield, CA

Average pressure - Fairfield, CA

The month with the highest atmospheric pressure is January (30.14").
Months with the lowest atmospheric pressure are June and August (29.91").

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Average wind speed
Fairfield, CA

Average wind speed - Fairfield, CA

The windiest months (with the highest average wind speed) are May, June and July (7mph).
The calmest months (with the lowest average wind speed) are January and November (4.5mph).

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Average rainfall
Fairfield, CA

Average rainfall - Fairfield, CA

The wettest month (with the highest rainfall) is February (2.4").
The driest month (with the least rainfall) is August (0").

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Average rainfall days
Fairfield, CA

Average rainfall days - Fairfield, CA

The month with the highest number of rainy days is March (12.9 days).
The month with the least rainy days is August (0.7 days).

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Average daylight / Average sunshine
Fairfield, CA

Average daylight / Average sunshine - Fairfield, CA

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.7h).

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Average sunshine days
Fairfield, CA

Average sunshine days - Fairfield, CA

The month with the most sunshine days is August (30.2 days).
The month with the least sunshine days is March (17 days).

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Average UV index
Fairfield, CA

Average UV index - Fairfield, CA

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 visibility
Fairfield, CA

Average visibility - Fairfield, 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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