Fortuna, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fortuna, a city in Humboldt County, California.
Today
80°F
Patchy Smoke
Patchy smoke after 11am. Sunny, with a high near 80. West northwest wind 2 to 10 mph.
7-day forecast for Fortuna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Patchy Smoke | 2 to 10 mph WNW | 0% |
| Tonight | 59°F | Patchy Fog | 0 to 8 mph NNW | 0% |
| Wednesday | 78°F | Patchy Smoke then Sunny | 0 to 12 mph NW | 0% |
| Wednesday Night | 58°F | Partly Cloudy | 0 to 8 mph NW | 0% |
| Thursday | 76°F | Mostly Sunny | 0 to 8 mph NW | 0% |
| Thursday Night | 57°F | Partly Cloudy | 0 to 7 mph N | 0% |
| Friday | 76°F | Mostly Sunny | 0 to 8 mph NNW | 0% |
| Friday Night | 56°F | Partly Cloudy | 0 to 8 mph N | 0% |
| Saturday | 75°F | Mostly Sunny | 0 to 10 mph NNW | 0% |
| Saturday Night | 54°F | Partly Cloudy | 2 to 10 mph NNW | 1% |
| Sunday | 71°F | Mostly Sunny | 2 to 12 mph NNW | 0% |
| Sunday Night | 54°F | Partly Cloudy | 3 to 12 mph NNW | 1% |
| Monday | 70°F | Mostly Sunny | 3 to 12 mph NNW | 1% |
| Monday Night | 54°F | Partly Cloudy | 2 to 12 mph NNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Fortuna (40.587, -124.142). Updated through the day.
Growing snapshot for Fortuna
Last spring frost
Feb 1
First fall frost
Dec 19
Growing season
328 days
Hardiness zone
9b
More local growing data for Fortuna: nearby ZIP 95540 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Scotia, Ca (5.9 mi from Fortuna). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.