Fortuna, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fortuna, a city in Humboldt County, California.
Today
65°F
Mostly Cloudy
Mostly cloudy, with a high near 65. Northwest wind 2 to 9 mph.
7-day forecast for Fortuna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 65°F | Mostly Cloudy | 2 to 9 mph NW | 3% |
| Tonight | 52°F | Cloudy | 2 to 8 mph NNW | 5% |
| Sunday | 65°F | Cloudy | 2 to 9 mph NNW | 5% |
| Sunday Night | 53°F | Mostly Cloudy then Patchy Fog | 1 to 9 mph NNW | 3% |
| Monday | 68°F | Patchy Fog then Mostly Cloudy | 1 to 9 mph NNW | 0% |
| Monday Night | 53°F | Mostly Cloudy then Patchy Fog | 1 to 9 mph NNW | 2% |
| Tuesday | 66°F | Partly Sunny | 2 to 10 mph NNW | 0% |
| Tuesday Night | 52°F | Mostly Cloudy then Patchy Fog | 1 to 10 mph N | 0% |
| Wednesday | 69°F | Patchy Fog then Partly Sunny | 1 to 9 mph N | 0% |
| Wednesday Night | 52°F | Mostly Cloudy then Patchy Fog | 0 to 9 mph N | 0% |
| Thursday | 70°F | Partly Sunny | 0 to 8 mph NNW | 0% |
| Thursday Night | 52°F | Mostly Cloudy then Patchy Fog | 1 to 8 mph N | 2% |
| Friday | 68°F | Partly Sunny | 1 to 9 mph NNW | 2% |
| Friday Night | 52°F | Mostly Cloudy | 1 to 9 mph N | 3% |
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 Sep 19, 2026.