Arcata, CA Weather & Growing Conditions
This Afternoon
67°F
Mostly Sunny
Mostly sunny, with a high near 67. West northwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Mostly Sunny | 3 mph WNW | 1% |
| Tonight | 49°F | Mostly Cloudy | 2 mph NE | 1% |
| Sunday | 68°F | Partly Sunny | 2 mph W | 1% |
| Sunday Night | 51°F | Mostly Cloudy | 1 mph WNW | 0% |
| Monday | 69°F | Mostly Sunny | 2 mph NW | 0% |
| Monday Night | 52°F | Partly Cloudy | 1 mph NNW | 0% |
| Tuesday | 66°F | Mostly Sunny | 2 mph NW | 0% |
| Tuesday Night | 49°F | Partly Cloudy | 2 mph NNW | 0% |
| Wednesday | 66°F | Mostly Sunny | 2 mph NW | 0% |
| Wednesday Night | 50°F | Partly Cloudy | 2 mph NNW | 0% |
| Thursday | 68°F | Mostly Sunny | 2 mph NW | 1% |
| Thursday Night | 50°F | Partly Cloudy | 1 mph NNW | 4% |
| Friday | 65°F | Mostly Sunny | 2 mph NNW | 4% |
| Friday Night | 49°F | Partly Cloudy | 1 mph NNW | 4% |
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 (17.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.