Montclair, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Montclair, a city in San Bernardino County, California.
Today
74°F
Mostly Sunny
Mostly sunny, with a high near 74. Southwest wind 0 to 5 mph.
7-day forecast for Montclair
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Mostly Sunny | 0 to 5 mph SW | 0% |
| Tonight | 54°F | Mostly Clear | 0 to 5 mph NE | 1% |
| Wednesday | 73°F | Sunny | 0 to 5 mph S | 0% |
| Wednesday Night | 56°F | Mostly Clear | 0 to 5 mph N | 0% |
| Thursday | 77°F | Sunny | 0 to 5 mph SE | 0% |
| Thursday Night | 56°F | Mostly Clear | 0 to 10 mph N | 0% |
| Friday | 80°F | Sunny | 0 to 10 mph NE | 0% |
| Friday Night | 57°F | Clear | 0 to 15 mph NE | 0% |
| Saturday | 83°F | Sunny | 0 to 10 mph NE | 0% |
| Saturday Night | 59°F | Clear | 0 to 15 mph N | 0% |
| Sunday | 83°F | Sunny | 0 to 10 mph NE | 0% |
| Sunday Night | 61°F | Partly Cloudy | 0 to 10 mph NE | 0% |
| Monday | 80°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Monday Night | 59°F | Partly Cloudy | 0 to 5 mph NE | 0% |
Forecast source: National Weather Service (api.weather.gov) for Montclair (34.071, -117.698). Updated through the day.
Growing snapshot for Montclair
Last spring frost
Jan 8
First fall frost
Dec 28
Growing season
354 days
Hardiness zone
10a
More local growing data for Montclair: nearby ZIP 91763 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Pomona/Fairplex, Ca (3.9 mi from Montclair). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.