Arcata, CA Weather & Growing Conditions
Today
55°F
Mostly Cloudy
Mostly cloudy. High near 55, with temperatures falling to around 50 in the afternoon. North wind 1 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 55°F | Mostly Cloudy | 1 to 6 mph N | 3% |
| Tonight | 44°F | Mostly Cloudy | 8 mph N | 3% |
| Thursday | 58°F | Sunny | 3 to 9 mph N | 0% |
| Thursday Night | 44°F | Partly Cloudy | 5 mph NE | 0% |
| Friday | 60°F | Mostly Sunny | 3 mph N | 0% |
| Friday Night | 48°F | Mostly Clear | 5 mph NE | 0% |
| Saturday | 65°F | Sunny | 1 to 7 mph S | 0% |
| Saturday Night | 51°F | Partly Cloudy then Slight Chance Light Rain | 3 mph SE | 15% |
| Sunday | 58°F | Slight Chance Light Rain then Partly Sunny | 2 mph N | 15% |
| Sunday Night | 50°F | Mostly Cloudy | 3 mph ENE | 1% |
| Monday | 58°F | Partly Sunny | 2 mph SSW | 10% |
| Monday Night | 48°F | Slight Chance Light Rain | 5 mph E | 15% |
| Tuesday | 59°F | Slight Chance Light Rain | 1 to 5 mph SSE | 22% |
| Tuesday Night | 52°F | Chance Light Rain | 2 to 12 mph S | 36% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Arcata, CA
Last spring frost
Mar 4
First fall frost
Nov 22
Growing season
264 days
Hardiness zone
9b
Explore more for Arcata, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Grizzly Creek Sp, Ca (12.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.