Johnsville, CA Weather & Growing Conditions
Overnight
53°F
Haze
Haze and patchy smoke. Clear, with a low around 53. Southeast wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Haze | 0 mph | 0% |
| Tuesday | 95°F | Haze then Sunny | 0 to 5 mph SW | 0% |
| Tuesday Night | 54°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Wednesday | 92°F | Sunny | 0 to 5 mph S | 0% |
| Wednesday Night | 54°F | Clear | 0 to 5 mph S | 0% |
| Thursday | 94°F | Sunny | 0 to 5 mph S | 0% |
| Thursday Night | 56°F | Clear | 0 to 5 mph S | 0% |
| Friday | 94°F | Sunny | 0 to 5 mph S | 0% |
| Friday Night | 57°F | Mostly Clear | 0 to 5 mph S | 0% |
| Saturday | 93°F | Sunny | 0 to 5 mph S | 0% |
| Saturday Night | 57°F | Clear | 0 to 5 mph S | 0% |
| Sunday | 91°F | Sunny | 0 to 10 mph S | 0% |
| Sunday Night | 54°F | Clear | 0 to 5 mph S | 0% |
| Monday | 88°F | Sunny | 0 to 10 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Johnsville, CA
Last spring frost
Jun 11
First fall frost
Sep 10
Growing season
91 days
Hardiness zone
7a
Explore more for Johnsville, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Portola, Ca (10.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.