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City of Arcata, CAArcata, CA Weather Forecast
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| Mostly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Cloudy |
| Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C | Hi: 80°FHi: 27°C Lo: 58°FLo: 14°C | Hi: 80°FHi: 27°C Lo: 58°FLo: 14°C | Hi: 80°FHi: 27°C Lo: 58°FLo: 14°C | Hi: 71°FHi: 22°C | Hi: 69°FHi: 21°C Lo: 53°FLo: 12°C | Hi: 69°FHi: 21°C Lo: 53°FLo: 12°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 136 AM PDT Sun Oct 04 2026 
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Issued: 1214 AM PDT Sun Oct 4 2026
Key Messages
- Unseasonably hot temperatures with near record highs continue to generate Moderate HeatRisk across the interior through mid next week.
- Shallow, diurnal marine layer persisting along the coast through the weekend.
- Dry conditions expected through this coming work week.
Discussion
...A consistent synoptic pattern remains overhead forcing relatively rinse and repeat weather for most of NW California. Interior areas remain very hot, with close to record breaking temperatures and dry. Therma...