Johnstonville, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Johnstonville, a community in Lassen County, California.
Tonight
44°F
Clear
Clear, with a low around 44. West wind around 0 mph.
7-day forecast for Johnstonville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 44°F | Clear | 0 mph | 0% |
| Saturday | 81°F | Sunny | 0 to 5 mph E | 0% |
| Saturday Night | 45°F | Partly Cloudy | 0 to 5 mph E | 0% |
| Sunday | 83°F | Partly Sunny | 0 to 10 mph E | 0% |
| Sunday Night | 48°F | Mostly Cloudy | 0 to 5 mph W | 0% |
| Monday | 86°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Monday Night | 48°F | Mostly Clear | 0 to 5 mph W | 0% |
| Tuesday | 88°F | Sunny | 0 to 5 mph W | 0% |
| Tuesday Night | 48°F | Mostly Clear | 0 to 5 mph W | 0% |
| Wednesday | 88°F | Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 47°F | Partly Cloudy | 0 to 10 mph W | 0% |
| Thursday | 88°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Thursday Night | 47°F | Partly Cloudy | 0 to 10 mph W | 1% |
| Friday | 83°F | Mostly Sunny | 0 to 15 mph SW | 1% |
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 Sep 19, 2026.