Arcata, CA Weather & Growing Conditions
This Afternoon
67°F
Mostly Sunny
Mostly sunny, with a high near 67. North northwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Mostly Sunny | 5 mph NNW | 1% |
| Tonight | 53°F | Mostly Cloudy | 5 mph N | 1% |
| Sunday | 67°F | Mostly Sunny | 3 mph NNW | 1% |
| Sunday Night | 53°F | Partly Cloudy | 3 mph NNW | 1% |
| Monday | 70°F | Sunny | 5 mph N | 0% |
| Monday Night | 55°F | Partly Cloudy | 5 mph N | 0% |
| Tuesday | 68°F | Sunny | 5 mph NNW | 0% |
| Tuesday Night | 52°F | Mostly Clear | 5 mph N | 0% |
| Wednesday | 71°F | Mostly Sunny | 5 mph N | 0% |
| Wednesday Night | 54°F | Partly Cloudy | 1 to 5 mph NNE | 0% |
| Thursday | 72°F | Mostly Sunny | 5 mph NNE | 0% |
| Thursday Night | 56°F | Partly Cloudy | 3 mph N | 1% |
| Friday | 68°F | Mostly Sunny | 5 mph NNE | 2% |
| Friday Night | 54°F | Partly Cloudy | 3 mph NE | 3% |
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 Sep 19, 2026.