Monthly weather forecast and climate
Acton, CA

Weather in January

January, like December, is another mild winter month in Acton, California, with temperature in the range of an average low of 40.6°F (4.8°C) and an average high of 57.9°F (14.4°C). In January, the average high-temperature is almost the same as in December - a still mild 57.9°F (14.4°C). Weather in January »

Weather in February

February, the last month of the winter, in Acton, is also a moderate month, with average temperature varying between 40.3°F (4.6°C) and 58.5°F (14.7°C). In February, the average high-temperature is essentially the same as in January - a still mild 58.5°F (14.7°C). Weather in February »

Weather in March

The first month of the spring, March, is a comfortable month in Acton, California, with temperature in the range of an average high of 63.1°F (17.3°C) and an average low of 42.6°F (5.9°C). In Acton, the average high-temperature is almost the same as in February - an enjoyable 63.1°F (17.3°C). Weather in March »

Weather in April

April in Acton, California, is an agreeable spring month, with average temperature fluctuating between 45.7°F (7.6°C) and 68.5°F (20.3°C). In Acton, the average high-temperature slightly increases, from an enjoyable 63.1°F (17.3°C) in March, to an agreeable 68.5°F (20.3°C). Weather in April »

Weather in May

The last month of the spring, May, is a warm month in Acton, California, with temperature in the range of an average low of 50.4°F (10.2°C) and an average high of 74.1°F (23.4°C). In Acton, the average high-temperature slightly increases, from an agreeable 68.5°F (20.3°C) in April, to a moderately hot 74.1°F (23.4°C). Weather in May »

Weather in June

June, the first month of the summer, in Acton, is also a moderately hot month, with average temperature ranging between max 83.3°F (28.5°C) and min 56.5°F (13.6°C). In Acton, the average high-temperature increases, from a moderately hot 74.1°F (23.4°C) in May, to a still warm 83.3°F (28.5°C). Weather in June »

Weather in July

July is a tropical summer month in Acton, California, with temperature in the range of an average high of 88.9°F (31.6°C) and an average low of 62.2°F (16.8°C). In July, the average high-temperature marginally rises, from a warm 83.3°F (28.5°C) in June, to a hot 88.9°F (31.6°C). Weather in July »

Weather in August

The last month of the summer, August, is also a hot month in Acton, California, with average temperature fluctuating between 63.1°F (17.3°C) and 89.2°F (31.8°C). August is the warmest month, with an average high-temperature of 89.2°F (31.8°C) and an average low-temperature of 63.1°F (17.3°C). Weather in August »

Weather in September

September, the first month of the autumn, in Acton, is still a warm month, with average temperature varying between 60.3°F (15.7°C) and 84.9°F (29.4°C). In Acton, the average high-temperature is essentially the same as in August - a moderately hot 84.9°F (29.4°C). Weather in September »

Weather in October

October, the same as September, is another warm autumn month in Acton, California, with average temperature fluctuating between 52.9°F (11.6°C) and 74.3°F (23.5°C). In Acton, California, the average high-temperature in October decreases, from 84.9°F (29.4°C) in September, to a still moderately hot 74.3°F (23.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an enjoyable month in Acton, California, with average temperature fluctuating between 64.6°F (18.1°C) and 45.5°F (7.5°C). In Acton, the average high-temperature drops, from a moderately hot 74.3°F (23.5°C) in October, to an enjoyable 64.6°F (18.1°C). Weather in November »

Weather in December

The first month of the winter, December, is still a mild month in Acton, California, with average temperature fluctuating between 39.2°F (4°C) and 55.6°F (13.1°C). The coldest month is December, with an average high-temperature of 55.6°F (13.1°C) and an average low-temperature of 39.2°F (4°C). Weather in December »
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FAQ

How many days does it rain in Acton?

Throughout the year, in Acton, there are 51.4 rainfall days, and 7.6" (193mm) of precipitation is accumulated.

When does it snow in Acton?

January through April, November and December are months with snowfall in Acton, California.

How much does it snow in Acton?

Throughout the year, in Acton, there are 1.9 snowfall days, and 5.98" (152mm) of snow is accumulated.

What is the month with the least sunshine in Acton?

With an average of 6.7h of sunshine, January has the least sunshine of the year in Acton.

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

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

What are the most humid months in Acton?

February, March and December, with an average relative humidity of 54%, are most humid months in Acton.

When it does not snow in Acton?

May through October are months without snowfall.

What is the driest month in Acton?

June is the month with the least rainfall in Acton. Rain falls for 1.2 days and accumulates 0.04" (1mm) of precipitation.

When are the longest days in Acton?

The month with the longest days in Acton is June, with an average of 14.4h of daylight.

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

June through September, with an average maximum UV index of 6, are months with the highest UV index in Acton, California.

What month has the most sunshine in Acton?

With an average of 12.1h of sunshine, July has the most sunshine of the year in Acton.

What is the warmest month in Acton?

With an average high-temperature of 89.2°F (31.8°C) and an average low-temperature of 63.1°F (17.3°C), August is the warmest month.

What is the least humid month in Acton?

With an average relative humidity of 38%, August is the least humid month.

What is the coldest month in Acton?

December is the coldest month, with an average high-temperature of 55.6°F (13.1°C) and an average low-temperature of 39.2°F (4°C).

What is the wettest month in Acton?

The month with the most rainfall in Acton is December when the rain falls for 6.3 days and typically aggregates up to 1.65" (42mm) of precipitation.

When does it snow the most in Acton?

The month with the most snowfall in Acton is December when snow falls for 0.2 days and typically aggregates up to 3.23" (82mm) of snow.

What is the month with the shortest days in Acton?

The month with the shortest days is December, with an average of 9.9h of daylight.

Average temperature
Acton, CA

Average temperature - Acton, CA

The warmest month (with the highest average high temperature) is August (89.2°F).
The month with the lowest average high temperature is December (55.6°F).

The month with the highest average low temperature is August (63.1°F).
The coldest month (with the lowest average low temperature) is December (39.2°F).

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Average pressure
Acton, CA

Average pressure - Acton, CA

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is June (29.87").

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Average wind speed
Acton, CA

Average wind speed - Acton, CA

The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is September (5.7mph).

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Average humidity
Acton, CA

Average humidity - Acton, CA

Months with the highest relative humidity are February, March and December (54%).
The month with the lowest relative humidity is August (38%).

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Average rainfall
Acton, CA

Average rainfall - Acton, CA

The wettest month (with the highest rainfall) is December (1.65").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days
Acton, CA

Average rainfall days - Acton, CA

The month with the highest number of rainy days is March (7.4 days).
The month with the least rainy days is June (1.2 days).

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Average snowfall
Acton, CA

Average snowfall - Acton, CA

The month with the highest snowfall is December (3.23").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days
Acton, CA

Average snowfall days - Acton, CA

The month with the highest number of snowfall days is February (0.8 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Acton, CA

Average daylight / Average sunshine - Acton, CA

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is January (Average sunshine: 6.7h).

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Average sunshine days
Acton, CA

Average sunshine days - Acton, CA

The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (21.3 days).

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Average UV index
Acton, CA

Average UV index - Acton, CA

Months with the highest UV index are June, July, August and September (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average visibility
Acton, CA

Average visibility - Acton, 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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