Mount Hermon, CA Weather & Growing Conditions
Tonight
47°F
Chance Light Rain then Areas Of Fog
A chance of rain before 8pm, then a chance of rain and patchy fog between 8pm and 9pm, then areas of fog and a chance of rain. Partly cloudy, with a low around 47. Northeast wind around 2 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Chance Light Rain then Areas Of Fog | 2 mph NE | 41% |
| Wednesday | 69°F | Patchy Fog then Sunny | 1 to 7 mph N | 1% |
| Wednesday Night | 46°F | Mostly Cloudy then Patchy Fog | 2 to 7 mph N | 0% |
| Thursday | 73°F | Patchy Fog then Sunny | 3 mph NNW | 0% |
| Thursday Night | 46°F | Mostly Clear | 0 to 5 mph N | 0% |
| Friday | 77°F | Sunny | 2 mph NNW | 0% |
| Friday Night | 48°F | Clear | 1 mph N | 0% |
| Saturday | 81°F | Sunny | 0 mph | 0% |
| Saturday Night | 47°F | Mostly Clear | 2 mph N | 0% |
| Sunday | 79°F | Sunny | 2 mph N | 0% |
| Sunday Night | 48°F | Partly Cloudy | 2 mph N | 0% |
| Monday | 76°F | Mostly Sunny | 0 to 3 mph NNW | 1% |
| Monday Night | 47°F | Partly Cloudy | 3 mph NNW | 2% |
| Tuesday | 76°F | Mostly Sunny | 1 mph NNW | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mount Hermon, CA
Last spring frost
Mar 25
First fall frost
Nov 11
Growing season
231 days
Hardiness zone
9a
Explore more for Mount Hermon, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Ben Lomond #4, Ca (2.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.