Arcata, CA Weather & Growing Conditions
This Afternoon
64°F
Mostly Cloudy
Mostly cloudy, with a high near 64. West northwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Mostly Cloudy | 5 mph WNW | 0% |
| Tonight | 51°F | Areas Of Fog | 0 to 3 mph W | 2% |
| Sunday | 64°F | Areas Of Fog then Mostly Cloudy | 0 to 5 mph WNW | 2% |
| Sunday Night | 52°F | Areas Of Fog | 0 to 5 mph NW | 1% |
| Monday | 66°F | Areas Of Fog then Partly Sunny | 0 to 5 mph NNW | 0% |
| Monday Night | 52°F | Areas Of Fog | 0 to 5 mph NNE | 0% |
| Tuesday | 66°F | Areas Of Fog then Partly Sunny | 0 to 6 mph NNW | 0% |
| Tuesday Night | 51°F | Areas Of Fog | 0 to 5 mph N | 0% |
| Wednesday | 67°F | Areas Of Fog then Mostly Sunny | 0 to 6 mph NNW | 0% |
| Wednesday Night | 51°F | Mostly Cloudy | 0 to 5 mph N | 0% |
| Thursday | 68°F | Partly Sunny | 0 to 5 mph NW | 1% |
| Thursday Night | 52°F | Mostly Cloudy then Patchy Fog | 0 to 3 mph N | 2% |
| Friday | 67°F | Patchy Fog then Partly Sunny | 0 to 6 mph NW | 2% |
| Friday Night | 50°F | Mostly Cloudy then Patchy Fog | 1 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Arcata, CA
Last spring frost
Feb 22
First fall frost
Dec 7
Growing season
293 days
Hardiness zone
9b
Explore more for Arcata, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Eureka Wfo Woodley Island, Ca (6.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.