Arcata, CA Weather & Growing Conditions
Today
54°F
Mostly Cloudy
Mostly cloudy, with a high near 54. Northwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 54°F | Mostly Cloudy | 5 mph NW | 3% |
| Tonight | 41°F | Mostly Cloudy | 2 mph NNE | 3% |
| Thursday | 58°F | Sunny | 0 to 5 mph N | 0% |
| Thursday Night | 42°F | Partly Cloudy | 0 mph | 0% |
| Friday | 60°F | Mostly Sunny | 1 mph NNW | 0% |
| Friday Night | 45°F | Mostly Clear | 0 mph | 0% |
| Saturday | 64°F | Sunny | 0 mph | 0% |
| Saturday Night | 46°F | Partly Cloudy then Slight Chance Light Rain | 0 mph | 15% |
| Sunday | 57°F | Slight Chance Light Rain then Patchy Fog | 0 mph | 15% |
| Sunday Night | 46°F | Patchy Fog then Mostly Cloudy | 0 mph | 2% |
| Monday | 57°F | Slight Chance Light Rain | 0 mph | 15% |
| Monday Night | 44°F | Slight Chance Light Rain | 1 mph ESE | 15% |
| Tuesday | 59°F | Slight Chance Light Rain | 1 mph SSE | 23% |
| Tuesday Night | 47°F | Chance Light Rain | 0 to 6 mph SSE | 35% |
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 Nov 4, 2026.