Lewiston, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lewiston, a community in Trinity County, California.
Overnight
38°F
Patchy Fog
Patchy fog. Mostly cloudy, with a low around 38. Southwest wind around 1 mph.
7-day forecast for Lewiston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 38°F | Patchy Fog | 1 mph SW | 0% |
| Wednesday | 60°F | Patchy Fog | 0 to 6 mph WSW | 3% |
| Wednesday Night | 34°F | Partly Cloudy then Patchy Frost | 1 to 6 mph WSW | 3% |
| Thursday | 65°F | Patchy Frost then Sunny | 0 to 3 mph NW | 0% |
| Thursday Night | 37°F | Mostly Clear | 1 mph NNW | 0% |
| Friday | 72°F | Sunny | 2 mph NW | 0% |
| Friday Night | 42°F | Mostly Clear | 0 mph | 0% |
| Saturday | 71°F | Sunny | 0 to 3 mph E | 0% |
| Saturday Night | 39°F | Partly Cloudy | 1 mph NNW | 1% |
| Sunday | 65°F | Mostly Sunny | 2 mph NNW | 1% |
| Sunday Night | 39°F | Partly Cloudy | 0 mph | 0% |
| Monday | 62°F | Patchy Fog then Partly Sunny | 1 mph NNE | 4% |
| Monday Night | 38°F | Partly Cloudy | 0 mph | 5% |
| Tuesday | 62°F | Slight Chance Light Rain | 2 mph E | 17% |
Forecast source: National Weather Service (api.weather.gov) for Lewiston (40.697, -122.823). Updated through the day.
Growing snapshot for Lewiston
Last spring frost
Apr 23
First fall frost
Oct 22
Growing season
178 days
Hardiness zone
8b
More local growing data for Lewiston: nearby ZIP 96052 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Burnt Ranch
Coffee Creek
Douglas City
Hayfork
Hyampom
Junction City
Mad River
Platina
Post Mountain
Ruth
Salyer
Trinity Center
Trinity Village
Weaverville
Climate data from the nearest NOAA station, Trinity Rvr Hatchery, Ca (3.1 mi from Lewiston). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.