Mount Hermon, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Hermon, a community in Santa Cruz County, California.
Today
63°F
Light Rain
Rain. Mostly cloudy. High near 63, with temperatures falling to around 60 in the afternoon. South southwest wind 1 to 12 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Mount Hermon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 63°F | Light Rain | 1 to 12 mph SSW | 92% |
| 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 | 49°F | Clear | 2 mph N | 0% |
| Saturday | 80°F | Sunny | 1 mph NW | 0% |
| Saturday Night | 48°F | Mostly Clear | 2 mph NNW | 0% |
| Sunday | 79°F | Mostly Sunny | 2 mph NNW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 2 mph N | 0% |
| Monday | 76°F | Partly Sunny | 1 to 5 mph NNW | 2% |
| Monday Night | 50°F | Partly Cloudy | 1 to 5 mph NNW | 3% |
Forecast source: National Weather Service (api.weather.gov) for Mount Hermon (37.051, -122.053). Updated through the day.
Growing snapshot for Mount Hermon
Last spring frost
Mar 25
First fall frost
Nov 11
Growing season
231 days
Hardiness zone
9a
More local growing data for Mount Hermon: nearby ZIP 95041 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Ben Lomond #4, Ca (2.7 mi from Mount Hermon). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.