Montclair, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Montclair, a city in San Bernardino County, California.
Tonight
60°F
Mostly Clear
Mostly clear, with a low around 60. North wind 0 to 5 mph.
7-day forecast for Montclair
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 60°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 85°F | Sunny | 0 to 10 mph SW | 0% |
| Saturday Night | 63°F | Partly Cloudy | 5 to 10 mph W | 0% |
| Sunday | 83°F | Mostly Sunny | 0 to 10 mph W | 0% |
| Sunday Night | 63°F | Partly Cloudy | 0 to 10 mph SW | 2% |
| Monday | 80°F | Mostly Sunny | 0 to 10 mph SW | 2% |
| Monday Night | 62°F | Partly Cloudy | 0 to 10 mph SW | 1% |
| Tuesday | 82°F | Sunny | 0 to 10 mph SW | 0% |
| Tuesday Night | 63°F | Clear | 0 to 10 mph W | 0% |
| Wednesday | 89°F | Sunny | 0 to 10 mph W | 0% |
| Wednesday Night | 65°F | Mostly Clear | 0 to 10 mph W | 0% |
| Thursday | 90°F | Sunny | 0 to 10 mph W | 3% |
| Thursday Night | 66°F | Mostly Clear | 0 to 10 mph W | 3% |
| Friday | 90°F | Sunny | 0 to 5 mph SW | 3% |
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 Sep 19, 2026.