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Arcata, CA Weather

Tonight: Partly Cloudy, low 35°F. Hourly and 10-day forecast from the National Weather Service. Times are local (PDT).

Arcata, CA current weather

48°F

Partly Cloudy

Forecast for this hour. No recent report from a nearby station.

H -- / L 35°

No recent station report. NWS hourly forecast updated 10/28/2026, 2:48 PM PT

2 active alerts

From the National Weather Service for this forecast zone or county

State alerts

Minor2Minimal to no known threat

Hourly forecast

NWS, updated 10/28/2026, 2:48 PM PT

  1. Now48°
  2. 9 PM46°
  3. 10 PM45°
  4. 11 PM44°
  5. 12 AM44°Thu
  6. 1 AM43°
  7. 2 AM42°
  8. 3 AM41°
  9. 4 AM40°
  10. 5 AM39°
  11. 6 AM38°
  12. 7 AM37°
  13. 8 AM36°
  14. 9 AM40°
  15. 10 AM45°
  16. 11 AM48°
  17. 12 PM50°
  18. 1 PM54°
  19. 2 PM55°
  20. 3 PM56°
  21. 4 PM56°
  22. 5 PM55°
  23. 6 PM53°
  24. 7 PM51°
  25. 8 PM48°
  26. 9 PM46°
  27. 10 PM46°
  28. 11 PM45°
  29. 12 AM44°Fri
  30. 1 AM43°
  31. 2 AM43°
  32. 3 AM42°
  33. 4 AM42°
  34. 5 AM40°
  35. 6 AM40°
  36. 7 AM39°
  37. 8 AM38°
  38. 9 AM41°
  39. 10 AM46°
  40. 11 AM50°
  41. 12 PM53°
  42. 1 PM54°
  43. 2 PM55°
  44. 3 PM56°
  45. 4 PM55°
  46. 5 PM54°
  47. 6 PM52°
  48. 7 PM49°

10-day forecast

Tap a day for details

  • Today10/28Low 35°High

    Tonight: Partly cloudy. Low around 35, with temperatures rising to around 39 overnight. North northeast wind 2 to 6 mph.

    Partly Cloudy
  • Thu10/29Low 37°High 56°

    Thursday: Patchy fog between 8am and 11am. Mostly cloudy, with a high near 56. North wind 1 to 10 mph.

    Thursday Night: Mostly cloudy, with a low around 37. Northeast wind 2 to 7 mph.

    Patchy Fog then Mostly Cloudy
  • Fri10/30Low 37°High 56°

    Friday: Partly sunny, with a high near 56. North northeast wind 0 to 5 mph.

    Friday Night: Patchy fog after 8pm. Mostly cloudy, with a low around 37. Northeast wind around 3 mph.

    Partly Sunny
  • Sat10/3131% chance of precipitationLow 38°High 55°

    Saturday: Patchy fog before 8am, then a chance of rain showers between 11am and 5pm, then a chance of rain. Partly sunny, with a high near 55. North wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

    Saturday Night: A chance of rain before 11pm. Partly cloudy, with a low around 38. New rainfall amounts less than a tenth of an inch possible.

    Chance Rain Showers then Chance Light Rain
  • Sun11/1Low 40°High 56°

    Sunday: Sunny, with a high near 56.

    Sunday Night: Partly cloudy, with a low around 40.

    Sunny
  • Mon11/222% chance of precipitationLow 44°High 59°

    Monday: A slight chance of rain after 4pm. Mostly cloudy, with a high near 59.

    Monday Night: A slight chance of rain. Mostly cloudy, with a low around 44.

    Mostly Cloudy then Slight Chance Light Rain
  • Tue11/319% chance of precipitationLow 44°High 60°

    Tuesday: A slight chance of rain before 10am. Partly sunny, with a high near 60.

    Tuesday Night: Mostly cloudy, with a low around 44.

    Slight Chance Light Rain then Partly Sunny
  • Wed11/417% chance of precipitationLow High 60°

    Wednesday: A slight chance of rain after 4pm. Partly sunny, with a high near 60.

    Partly Sunny then Slight Chance Light Rain
  • Thu11/5Model blend35% chance of precipitationLow 45°High 59°

    Thursday: Chance of rain. High near 59°. Low that night near 45°. About 0.06 in of precipitation.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Fri11/6Model blend30% chance of precipitationLow 45°High 59°

    Friday: Chance of rain. High near 59°. Low that night near 45°. About 0.10 in of precipitation.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

Forecast for 40.871, -124.079 from the NWS EKA office, updated 10/28/2026, 2:48 PM PT · Official forecast on weather.gov

Days 9 to 10: NOAA National Blend of Models, station KEKA (Eureka/Murray Fld, 5 mi), model run 10/28/2026, 7:00 PM PDT

From the National Weather Service; may be delayed. Not for life-safety decisions. In an emergency, call 911.

Next 6 hours

NWS hourly forecast

  1. Now48°Partly Cloudy0%3 mph
  2. 9 PM46°Partly Cloudy0%3 mph
  3. 10 PM45°Partly Cloudy0%3 mph
  4. 11 PM44°Partly Cloudy0%2 mph
  5. 12 AM44°Partly Cloudy0%2 mph
  6. 1 AM43°Partly Cloudy0%2 mph

Hourly details

Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShow

Radar and satellite

National radar

NEXRAD (up to 24 hours) and GOES

Latest

Frequently asked questions

Will it rain in Arcata, CA in the next 24 hours?
The NWS hourly forecast does not show any hour with a 50% or higher chance of precipitation in the next 24 hours.
What is the 10-day forecast for Arcata, CA?
The first 8 days come from the National Weather Service forecast. Days 9 to 10 (Nov 5 to Nov 6) come from the NOAA National Blend of Models, with highs near 59°F and up to a 35% chance of precipitation. Model guidance this far out often changes.
What time is sunrise and sunset in Arcata, CA today?
Sunrise is about 7:42 AM PDT and sunset is about 6:17 PM PDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Arcata, CA?
At Eureka WFO Woodley Island, the 1991 to 2020 normal high in October is 62°F and the normal low is 47°F.

Rain and snow totals

Next 3 days, NWS forecast grid

Rain (liquid)
0.04 in
Snow
0.00 in
Ice
--

Nearby hazards

California hazards

Severe storm and flash flood outlooks, expected rain, river flooding and wildfires near this area

  • Severe storm outlook today:No thunderstorm risk area over this locationOutlook map
  • Excessive rainfall outlook (flash flood risk):Could not check the Weather Prediction Center outlook right now.
  • River gauges within 40 miles at or above flood stage: None reported
  • Active wildfires within 50 miles: Red Rock Fire

UV and air quality forecast

EPA and AirNow

UV index today (Arcata)
3Moderate

UV index guide · Air quality

Drought

By county

Humboldt County, week of 10/20/2026

1% of the county is in moderate drought or worse.

Tides nearby

NOAA tide stations

Beaches nearby

EPA BEACON beaches

Sun and moon

Local time, center of the area

Sunrise
7:42 AM
Sunset
6:17 PM
Daylight
10 hr 35 min
Moon
Waning Gibbous 90% lit
First light (civil dawn)
7:14 AM
Last light (civil dusk)
6:45 PM
Moonrise
7:47 PM
Moonset
10:57 AM

Normal October weather

Climate

Normal October high 62°, low 47°, precipitation 2.31 in for the month. 1991 to 2020 normals at Eureka WFO Woodley Island, 6 mi away.

Other places nearby

Data sources

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About this data

Weather and emergencies: Weather, air quality and hazard information on this page is delayed and may be incomplete. It is not a substitute for official warnings. Always follow the National Weather Service, local emergency management and public safety officials. In an emergency, call 911. For evacuation orders, use your local official alert system.

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