Monthly weather forecast and climate
Arcata, CA

Weather in January

January, like December, in Arcata, California, is another fresh winter month, with average temperature varying between 43°F (6.1°C) and 53.6°F (12°C). In January, the average high-temperature is essentially the same as in December - a still cool 53.6°F (12°C). Weather in January »

Weather in February

The last month of the winter, February, is another cool month in Arcata, California, with average temperature varying between 52.9°F (11.6°C) and 41.9°F (5.5°C). In Arcata, the average high-temperature is practically the same as in January - a still fresh 52.9°F (11.6°C). Weather in February »

Weather in March

The first month of the spring, March, is also a fresh month in Arcata, California, with average temperature ranging between max 54°F (12.2°C) and min 42.1°F (5.6°C). In March, the average high-temperature is almost the same as in February - a still cool 54°F (12.2°C). Weather in March »

Weather in April

April in Arcata, California, is a moderate spring month, with average temperature varying between 56.5°F (13.6°C) and 44.1°F (6.7°C). In Arcata, the average high-temperature in April is essentially the same as in March - a mild 56.5°F (13.6°C). Weather in April »

Weather in May

The last month of the spring, May, is also a moderate month in Arcata, California, with average temperature ranging between min 45.9°F (7.7°C) and max 60.4°F (15.8°C). In May, the average high-temperature is relatively the same as in April - a still mild 60.4°F (15.8°C). Weather in May »

Weather in June

The first month of the summer, June, is an enjoyable month in Arcata, California, with average temperature fluctuating between 49.5°F (9.7°C) and 64.8°F (18.2°C). In Arcata, the average high-temperature is essentially the same as in May - an enjoyable 64.8°F (18.2°C). Weather in June »

Weather in July

July is an agreeable summer month in Arcata, California, with temperature in the range of an average low of 52.2°F (11.2°C) and an average high of 69.1°F (20.6°C). In July, the average high-temperature is practically the same as in June - an agreeable 69.1°F (20.6°C). Weather in July »

Weather in August

August, the last month of the summer, in Arcata, is also an agreeable month, with average temperature fluctuating between 69.6°F (20.9°C) and 52.3°F (11.3°C). The warmest month is August, with an average high-temperature of 69.6°F (20.9°C) and an average low-temperature of 52.3°F (11.3°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in Arcata, California, with temperature in the range of an average high of 68.9°F (20.5°C) and an average low of 51.6°F (10.9°C). In September, the average high-temperature is almost the same as in August - a still pleasant 68.9°F (20.5°C). Weather in September »

Weather in October

October, like September, in Arcata, California, is another comfortable autumn month, with average temperature fluctuating between 63.1°F (17.3°C) and 49.1°F (9.5°C). In October, the average high-temperature marginally drops, from an agreeable 68.9°F (20.5°C) in September, to a comfortable 63.1°F (17.3°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a moderate month in Arcata, California, with temperature in the range of an average low of 45.1°F (7.3°C) and an average high of 57°F (13.9°C). In November, the average high-temperature slightly decreases, from a comfortable 63.1°F (17.3°C) in October, to a moderate 57°F (13.9°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cool month in Arcata, California, with average temperature varying between 42.1°F (5.6°C) and 52.7°F (11.5°C). With an average high-temperature of 52.7°F (11.5°C) and an average low-temperature of 42.1°F (5.6°C), December is the coldest month. Weather in December »
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FAQ

How much does it rain in Arcata?

Throughout the year, in Arcata, California, there are 114.7 rainfall days, and 29.37" (746mm) of precipitation is accumulated.

How much does it snow in Arcata?

Throughout the year, 0.39" (10mm) of snow is accumulated.

When it does not snow in Arcata?

In Arcata, California, snow does not fall in January, March through December.

What is the month with the lowest UV index in Arcata?

Months with the lowest UV index in Arcata are January through March, November and December, with an average maximum UV index of 3.

When does it snow in Arcata?

February is the only month when snow falls.

When does it snow the most in Arcata?

The month with the most snowfall is February when snow falls for 0.3 days and typically aggregates up to 0.39" (10mm) of snow.

What is the most humid month in Arcata?

March is the most humid month in Arcata, California, with an average relative humidity of 82%.

When are the longest days in Arcata?

June has the longest days of the year in Arcata, California, with an average of 15.1h of daylight.

What is the driest month in Arcata?

July is the month with the least rainfall in Arcata, California. Rain falls for 2.3 days and accumulates 0.12" (3mm) of precipitation.

What month has the most sunshine in Arcata?

July has the most sunshine of the year, with an average of 11.6h of sunshine.

When is the highest UV index in Arcata?

The month with the highest UV index is July, with an average maximum UV index of 5.

What is the warmest month in Arcata?

With an average high-temperature of 69.6°F (20.9°C) and an average low-temperature of 52.3°F (11.3°C), August is the warmest month in Arcata, California.

What is the least humid month in Arcata?

October is the least humid month in Arcata, with an average relative humidity of 75%.

What is the coldest month in Arcata?

The coldest month in Arcata, California, is December, with an average high-temperature of 52.7°F (11.5°C) and an average low-temperature of 42.1°F (5.6°C).

What is the wettest month in Arcata?

The month with the most rainfall in Arcata, California, is December when the rain falls for 15.2 days and typically aggregates up to 5.31" (135mm) of precipitation.

What is the month with the shortest days in Arcata?

December has the shortest days of the year, with an average of 9.3h of daylight.

What is the month with the least sunshine in Arcata?

December has the least sunshine of the year in Arcata, with an average of 5.2h of sunshine.

Average temperature
Arcata, CA

Average temperature - Arcata, CA

The warmest month (with the highest average high temperature) is August (69.6°F).
The month with the lowest average high temperature is December (52.7°F).

The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is February (41.9°F).

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Average pressure
Arcata, CA

Average pressure - Arcata, CA

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is August (29.96").

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Average wind speed
Arcata, CA

Average wind speed - Arcata, CA

The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

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Average rainfall
Arcata, CA

Average rainfall - Arcata, CA

The wettest month (with the highest rainfall) is December (5.31").
The driest month (with the least rainfall) is July (0.12").

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Average rainfall days
Arcata, CA

Average rainfall days - Arcata, CA

The month with the highest number of rainy days is March (17.5 days).
The month with the least rainy days is August (2.1 days).

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Average snowfall
Arcata, CA

Average snowfall - Arcata, CA

The month with the highest snowfall is February (0.39").
Months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days
Arcata, CA

Average snowfall days - Arcata, CA

The month with the highest number of snowfall days is February (0.3 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).

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Average daylight / Average sunshine
Arcata, CA

Average daylight / Average sunshine - Arcata, CA

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

The month with the most sunshine is July (Average sunshine: 11.6h).
The month with the least sunshine is December (Average sunshine: 5.2h).

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Average sunshine days
Arcata, CA

Average sunshine days - Arcata, CA

The month with the most sunshine days is July (28.3 days).
The month with the least sunshine days is March (12.1 days).

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Average UV index
Arcata, CA

Average UV index - Arcata, CA

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 3).

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Average visibility
Arcata, CA

Average visibility - Arcata, CA

Months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).

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