Climate and monthly weather forecastArcata, CA
Climate and monthly weather forecast
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 »Updated: Feb 9, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Arcata, during the entire year, the rain falls for 114.7 days and collects up to 29.37" (746mm) of precipitation.
In Arcata, snow does not fall in January, March through December.
Throughout the year, in Arcata, 0.39" (10mm) of snow is accumulated.
January through March, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Arcata.
The only month with snowfall is February.
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.
March is the most humid month in Arcata, with an average relative humidity of 82%.
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.
With an average of 15h and 6min of daylight, June has the longest days of the year 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.
The month with the most sunshine is July, with an average of 11.6h of sunshine.
The month with the highest UV index in Arcata, California, is July, with an average maximum UV index of 5.
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).
October is the least humid month in Arcata, California, with an average relative humidity of 75%.
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.
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.
With an average of 9h and 18min of daylight, December has the shortest days of the year 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
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 in January:
30.13"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
30.07"Hg - Average pressure in May:
30.02"Hg - Average pressure in June:
29.99"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.11"Hg
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 in January:
7.4mph - Average wind speed in February:
8.3mph - Average wind speed in March:
8.4mph - Average wind speed in April:
8mph - Average wind speed in May:
7.5mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
5.7mph - Average wind speed in September:
6mph - Average wind speed in October:
6.8mph - Average wind speed in November:
7.1mph - Average wind speed in December:
7.9mph
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
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 in January:
4.72" - Average rainfall in February:
3.74" - Average rainfall in March:
4.57" - Average rainfall in April:
2.32" - Average rainfall in May:
1.77" - Average rainfall in June:
0.51"
- Average rainfall in July:
0.12" - Average rainfall in August:
0.16" - Average rainfall in September:
0.79" - Average rainfall in October:
2.05" - Average rainfall in November:
3.31" - Average rainfall in December:
5.31"
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 in January:
14.8 days - Average rainfall days in February:
13.3 days - Average rainfall days in March:
17.5 days - Average rainfall days in April:
12.8 days - Average rainfall days in May:
7.8 days - Average rainfall days in June:
4.8 days
- Average rainfall days in July:
2.3 days - Average rainfall days in August:
2.1 days - Average rainfall days in September:
4.5 days - Average rainfall days in October:
8 days - Average rainfall days in November:
11.6 days - Average rainfall days in December:
15.2 days
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
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 in January:
0 days - Average snowfall days in February:
0.3 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0.1 days
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 in January:
9h and 36min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
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).
- Average sunshine in January:
5h and 18min - Average sunshine in February:
5h and 36min - Average sunshine in March:
6h and 42min - Average sunshine in April:
9h and 0min - Average sunshine in May:
9h and 54min - Average sunshine in June:
10h and 48min
- Average sunshine in July:
11h and 36min - Average sunshine in August:
11h and 30min - Average sunshine in September:
10h and 18min - Average sunshine in October:
6h and 42min - Average sunshine in November:
6h and 0min - Average sunshine in December:
5h and 12min
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 in January:
15.3 days - Average sunshine days in February:
13.3 days - Average sunshine days in March:
12.1 days - Average sunshine days in April:
15.8 days - Average sunshine days in May:
21.8 days - Average sunshine days in June:
23.8 days
- Average sunshine days in July:
28.3 days - Average sunshine days in August:
27.9 days - Average sunshine days in September:
24.9 days - Average sunshine days in October:
22 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
14.7 days
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
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 cloud cover
Arcata, CA
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 16).
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).
