TODAY AUG21
TEMPERATURE59
HUMIDITY
PRESSURE29.92
WIND COND.270 10.4
  • 6555Tue
  • 6554Wed
  • 6754Thu
  • 6654Fri
  • 6754Sat
daynightWeather update from Eureka WFO at

Arcata Average Weather

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January38°F56°F47°F6.0"
February39°F56°F48°F5.3"
March40°F56°F48°F6.9"
April40°F57°F49°F3.6"
May44°F59°F52°F1.2"
June47°F62°F55°F0.7"
July50°F63°F56°F0.2"
August50°F64°F57°F0.2"
September47°F65°F56°F0.5"
October45°F64°F54°F3.4"
November42°F59°F51°F5.2"
December37°F55°F47°F7.3"

Did you know?

  • The highest monthly average temperature in Arcata for August is 57 degrees.
  • The lowest monthly average temperature in Arcata for December is 47 degrees.
  • The most monthly precipitation in Arcata occurs in December with 7.3 inches.
  • The air quality index in Arcata is 37% better than the national average.
  • The pollution index in Arcata is 11% worse than the national average.

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Compare Arcata, CA Weather To Other Cities

Arcata air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexArcataCaliforniaNational
Air quality index315550
Pollution index5,642,31018,106,7265,066,862

Arcata air quality information

MeasurementTotal
Days measured365
Days with good air quality318
Days with moderate air quality47
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Arcata air quality information

PollutantTotal
Arsenic0.060%
Benzene0.080%
Carbon Tetrachloride0.000%
Lead0.050%
Mercury0.050%

Average monthly Arcata temperature with heat index

Arcata monthly precipitation with daily maximum

Arcata monthly snow depth with daily maximum

Arcata monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Bayview CDP (Contra Costa County), CA1,7533138%
Eureka, CA27,0023138%
Humboldt Hill, CA3,7103138%
Myrtletown, CA5,3203138%
Westhaven-Moonstone, CA9883138%
Arcata, CA17,7753138%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Albert Lea, MN17,7751864%
Dumont, NJ17,788536%
Central Point, OR17,793468%
Maumelle, AR17,795476%
Shafter, CA17,8017958%
Arcata, CA17,7753138%
Source: The Arcata, CA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.