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City of Arcata, CAArcata, CA Weather Forecast
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Arcata Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | FRIDAY |
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| Fog | Patchy Fog | Mostly Cloudy | Patchy Fog | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy | Patchy Fog | Patchy Fog | Patchy Fog | Patchy Fog |
| Hi: 67°FHi: 19°C | Lo: 53°FLo: 12°C | Hi: 69°FHi: 21°C | Lo: 54°FLo: 12°C | Hi: 69°FHi: 21°C | Hi: 69°FHi: 21°C Lo: 54°FLo: 12°C | Hi: 69°FHi: 21°C Lo: 54°FLo: 12°C | Hi: 69°FHi: 21°C Lo: 54°FLo: 12°C | Hi: 69°FHi: 21°C Lo: 54°FLo: 12°C | Hi: 69°FHi: 21°C Lo: 54°FLo: 12°C | Hi: 69°FHi: 21°C Lo: 54°FLo: 12°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 136 AM PDT Sat Aug 15 2026 
Arcata Radar Loop
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Arcata Forecast Discussion
Issued: 1247 AM PDT Sat Aug 15 2026
Key Messages
- Smokey conditions continue from the MP18 Fire, focused in the Trinity River Valley and Trinity County.
- Near to below normal temperatures are likely through next week.
Discussion
...Troughing continues over the area through the weekend and into early next week. This has supported a much deeper marine layer with stratus reaching far inland, along with moderated interior temperatures. Near to below normal temperatures are expected to continue through much of ...