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Trinidad, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Trinidad, a city in Humboldt County, California.

This Afternoon
60°F
Mostly Sunny
Mostly sunny, with a high near 60. North northwest wind around 12 mph.

7-day forecast for Trinidad

WhenTempForecastWindPrecip
This Afternoon 60°F Mostly Sunny 12 mph NNW 0%
Tonight 54°F Mostly Cloudy 3 to 12 mph N 1%
Saturday 59°F Mostly Cloudy 3 to 10 mph NNW 1%
Saturday Night 54°F Mostly Cloudy 2 to 9 mph NE 3%
Sunday 59°F Mostly Cloudy 2 to 10 mph N 1%
Sunday Night 54°F Mostly Cloudy 3 to 10 mph N 1%
Monday 60°F Partly Sunny 5 to 9 mph NNW 0%
Monday Night 54°F Partly Cloudy 2 to 9 mph N 0%
Tuesday 61°F Mostly Sunny 3 to 12 mph N 0%
Tuesday Night 54°F Partly Cloudy 5 to 12 mph N 0%
Wednesday 61°F Mostly Sunny 5 to 9 mph NNW 0%
Wednesday Night 54°F Partly Cloudy 3 to 9 mph NNE 0%
Thursday 62°F Mostly Sunny 3 to 7 mph NNW 1%
Thursday Night 55°F Mostly Cloudy 6 mph N 6%

Forecast source: National Weather Service (api.weather.gov) for Trinidad (41.058, -124.143). Updated through the day.

Growing snapshot for Trinidad

Last spring frost
Mar 8
First fall frost
Nov 30
Growing season
262 days
Hardiness zone
9b

More local growing data for Trinidad: nearby ZIP 95570 weather · frost dates · planting calendar · California frost dates

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Climate data from the nearest NOAA station, Arcata Eureka Ap, Ca (9.5 mi from Trinidad). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.