Johnstonville, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Johnstonville, a community in Lassen County, California.
Today
56°F
Chance Light Rain
A chance of rain. Mostly cloudy. High near 56, with temperatures falling to around 45 in the afternoon. West wind around 10 mph. Chance of precipitation is 40%.
7-day forecast for Johnstonville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 56°F | Chance Light Rain | 10 mph W | 44% |
| Tonight | 28°F | Slight Chance Light Rain then Partly Cloudy | 0 to 10 mph W | 16% |
| Wednesday | 57°F | Mostly Sunny | 0 to 5 mph SE | 0% |
| Wednesday Night | 28°F | Partly Cloudy | 0 to 5 mph NW | 0% |
| Thursday | 61°F | Sunny | 0 to 5 mph NE | 0% |
| Thursday Night | 30°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Friday | 63°F | Sunny | 0 to 5 mph E | 0% |
| Friday Night | 31°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Saturday | 65°F | Sunny | 0 to 5 mph E | 0% |
| Saturday Night | 31°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Sunday | 68°F | Mostly Sunny | 0 to 5 mph SW | 0% |
| Sunday Night | 33°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Monday | 66°F | Mostly Sunny | 0 to 5 mph SW | 4% |
| Monday Night | 32°F | Partly Cloudy | 0 to 5 mph W | 4% |
Forecast source: National Weather Service (api.weather.gov) for Johnstonville (40.380, -120.586). Updated through the day.
Growing snapshot for Johnstonville
Last spring frost
May 16
First fall frost
Oct 8
Growing season
143 days
Hardiness zone
7a
More local growing data for Johnstonville: nearby ZIP 96114 weather · frost dates · planting calendar · California frost dates
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Susanville
Climate data from the nearest NOAA station, Susanville 2Sw, Ca (12.6 mi from Johnstonville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.