Climate and monthly weather forecast
Arcata, CA

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Weather in January

January, the same as December, is a cool winter month in Arcata, California, with an average temperature fluctuating between 43°F (6.1°C) and 53.6°F (12°C). Arcata's January average high-temperature settles at a still fresh 53.6°F (12°C), showing a near match with the preceding month. Weather in January »

Weather in February

February, the last month of the winter in Arcata, is another cool month, with an average temperature fluctuating between 52.9°F (11.6°C) and 41.9°F (5.5°C). Stepping into February, Arcata records an average high-temperature of a still fresh 52.9°F (11.6°C), almost consistent with January. Weather in February »

Weather in March

March, the first month of the spring in Arcata, is still a cool month, with an average temperature ranging between max 54°F (12.2°C) and min 42.1°F (5.6°C). March's weather displays an average high-temperature of a still cool 54°F (12.2°C), slightly varied from February's 52.9°F (11.6°C). Weather in March »

Weather in April

April in Arcata, California, is a refreshing spring month, with temperature in the range of an average low of 44.1°F (6.7°C) and an average high of 56.5°F (13.6°C). As Arcata, California, transitions into April, the average high-temperature stands at a moderate 56.5°F (13.6°C), offering little variation from the preceding month. Weather in April »

Weather in May

May, the last month of the spring in Arcata, is also a moderate month, with an average temperature ranging between max 60.4°F (15.8°C) and min 45.9°F (7.7°C). Arcata's average high-temperature in May sits at a still refreshing 60.4°F (15.8°C), showing little difference from the previous month. Weather in May »

Weather in June

June, the first month of the summer in Arcata, is a comfortable month, with an average temperature fluctuating between 64.8°F (18.2°C) and 49.5°F (9.7°C). The transition from May to June sees average high-temperatures adjusting to a still refreshing 64.8°F (18.2°C), from a not significantly different 60.4°F (15.8°C). Weather in June »

Weather in July

July in Arcata, California, is a pleasant summer month, with an average temperature varying between 52.2°F (11.2°C) and 69.1°F (20.6°C). July's climate shows a minor adjustment in average high-temperatures to a pleasant 69.1°F (20.6°C) from June's 64.8°F (18.2°C). Weather in July »

Weather in August

The last month of the summer, August, is another pleasant month in Arcata, California, with an average temperature fluctuating between 69.6°F (20.9°C) and 52.3°F (11.3°C). August brings the highest temperatures, with an average high of 69.6°F (20.9°C) and an average low of 52.3°F (11.3°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an agreeable month in Arcata, California, with an average temperature varying between 51.6°F (10.9°C) and 68.9°F (20.5°C). Arcata's shift into September sets the average high-temperature at a still agreeable 68.9°F (20.5°C), a figure that deviates only slightly from August's 69.6°F (20.9°C). Weather in September »

Weather in October

October, the same as September, is another comfortable autumn month in Arcata, California, with an average temperature fluctuating between 63.1°F (17.3°C) and 49.1°F (9.5°C). The advent of October brings a slight shift in average high-temperature, moving from a pleasant 68.9°F (20.5°C) in September to a comfortable 63.1°F (17.3°C). Weather in October »

Weather in November

November, the last month of the autumn in Arcata, is also a moderate month, with an average temperature varying between 45.1°F (7.3°C) and 57°F (13.9°C). The advent of November brings a slight shift in average high-temperature, moving from a refreshing 63.1°F (17.3°C) in October to a mild 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 an average temperature varying between 52.7°F (11.5°C) and 42.1°F (5.6°C). Arcata's coldest month, December, registers temperatures that range from a high of 52.7°F (11.5°C) to a low of 42.1°F (5.6°C). Weather in December »

Frequently asked questions

How much does it rain in Arcata?

In Arcata, during the entire year, the rain falls for 114.7 days and collects up to 29.37" (746mm) of precipitation.

When it does not snow in Arcata?

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

How much does it snow in Arcata?

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

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

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

When does it snow in Arcata?

The only month with snowfall is February.

What is the snowiest month in Arcata?

The month with the most snowfall in Arcata, California, 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, with an average relative humidity of 82%.

When is Daylight Saving Time (DST) in Arcata?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Arcata, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.

When are the longest days in Arcata?

With an average of 15h and 6min of daylight, June has the longest days of the year in Arcata.

What is the driest month in Arcata?

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

What month has the most sunshine in Arcata?

The month with the most sunshine is July, with an average of 11.6h of sunshine.

When is the highest UV index in Arcata?

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

What part of the year is the hottest in Arcata?

August stands out as Arcata's warmest month, with an average high-temperature of 69.6°F (20.9°C) and a low-temperature of 52.3°F (11.3°C).

What is the least humid month in Arcata?

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

What part of the year is the coldest in Arcata?

Arcata's December weather reaches an average high of 52.7°F (11.5°C) and an average low of 42.1°F (5.6°C), making it the coldest month.

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?

With an average of 9h and 18min of daylight, December has the shortest days of the year in Arcata.

What is the month with the least sunshine in Arcata?

The month with the least sunshine in Arcata, California, is December, 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).

Average pressure
Arcata, CA

Average pressure - Arcata, CA

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

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).

Average humidity
Arcata, CA

Average humidity - Arcata, CA

The month with the highest relative humidity is March (82%).
The month with the lowest relative humidity is October (75%).

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").

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).

Average snowfall
Arcata, CA

Average snowfall - Arcata, CA

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

Average snowfall days
Arcata, CA

Average snowfall days - Arcata, CA

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

Average daylight / Average sunshine
Arcata, CA

Average daylight / Average sunshine - Arcata, CA

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

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).

Average UV index
Arcata, CA

Average UV index - Arcata, CA

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

Average visibility
Arcata, CA

Average visibility - Arcata, CA

The 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).

Arcata, California, USA

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