Johnsville, CA Weather & Growing Conditions
This Afternoon
52°F
Light Rain
Rain. Mostly cloudy. High near 52, with temperatures falling to around 40 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 80%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 52°F | Light Rain | 5 to 10 mph SW | 77% |
| Tonight | 30°F | Chance Light Rain then Mostly Cloudy | 0 to 5 mph N | 43% |
| Wednesday | 58°F | Mostly Sunny | 0 to 5 mph E | 0% |
| Wednesday Night | 30°F | Partly Cloudy | 0 mph | 0% |
| Thursday | 61°F | Sunny | 0 to 5 mph NE | 0% |
| Thursday Night | 31°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Friday | 65°F | Sunny | 0 to 5 mph E | 0% |
| Friday Night | 33°F | Mostly Clear | 0 to 10 mph E | 0% |
| Saturday | 68°F | Sunny | 0 to 5 mph E | 0% |
| Saturday Night | 34°F | Mostly Clear | 0 to 5 mph S | 0% |
| Sunday | 66°F | Mostly Sunny | 0 to 5 mph S | 0% |
| Sunday Night | 36°F | Partly Cloudy | 0 mph | 0% |
| Monday | 63°F | Mostly Sunny | 0 to 5 mph S | 3% |
| Monday Night | 35°F | Partly Cloudy | 0 mph | 3% |
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 Nov 3, 2026.