Arcata, CA Weather & Growing Conditions
Overnight
63°F
Mostly Clear
Mostly clear, with a low around 63. East southeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Mostly Clear | 3 mph ESE | 0% |
| Tuesday | 85°F | Sunny then Patchy Smoke | 1 to 6 mph SW | 0% |
| Tuesday Night | 66°F | Patchy Smoke | 0 to 3 mph N | 0% |
| Wednesday | 82°F | Sunny | 0 to 5 mph NW | 0% |
| Wednesday Night | 62°F | Mostly Clear | 2 mph NW | 0% |
| Thursday | 80°F | Sunny | 2 mph WNW | 0% |
| Thursday Night | 60°F | Mostly Clear | 1 mph NW | 0% |
| Friday | 81°F | Sunny | 2 mph NW | 0% |
| Friday Night | 61°F | Mostly Clear | 2 mph NW | 0% |
| Saturday | 77°F | Sunny | 0 to 3 mph NW | 0% |
| Saturday Night | 56°F | Mostly Clear | 2 mph NW | 0% |
| Sunday | 72°F | Sunny | 0 to 3 mph NW | 0% |
| Sunday Night | 53°F | Mostly Clear | 2 mph NW | 0% |
| Monday | 70°F | Sunny | 0 to 3 mph NW | 0% |
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 Aug 4, 2026.