What is the air quality in Arcata today?

The current Air Quality Index (AQI) in Arcata is 24 (Good). PM2.5 concentration is 5.8 µg/m³.

What is the temperature in Arcata right now?

The current temperature in Arcata is 20.9°C (feels like 20.9°C). Humidity is 24.2% and wind speed is 22.6 km/h.

Is it safe to go outside in Arcata?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Arcata, United States

Clear

20.9°C · 24.2% humidity

20.9°

Feels 20.9°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Model forecast

Nearby Monitoring Stations

AQI Forecast

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View AQI history for Arcata →

Arcata's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

24.2%

Humidity

22.6 km/h

Wind W

1019.5 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

5.8 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Arcata?

Temperature & Precipitation

PM2.55.8 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

What is the 7-day forecast for Arcata?

10-20

20.9° 9.1°

10-21

22.6° 8.9°

0.25 mm

10-22

27.1° 7.3°

10-23

17.5° 8.4°

10-24

23.0° 7.4°

3.69 mm

10-25

24.6° 9.5°

0.13 mm

10-26

23.9° 10.1°

0.06 mm

Both models agree Avg diff: 5.3°C

What cities are near Arcata?

24 Bayside 24 McKinleyville 24 Eureka 24 Redding 17 Grants Pass 57 Central Point 24 Ukiah 24 Chico 24 Paradise 25 Klamath Falls

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ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-10-20T20:55 UTC.