Charter Oak, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Charter Oak, a community in Los Angeles County, California.
Overnight
68°F
Partly Cloudy
Partly cloudy, with a low around 68. Southwest wind around 0 mph.
7-day forecast for Charter Oak
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 68°F | Partly Cloudy | 0 mph | 0% |
| Tuesday | 94°F | Sunny | 0 to 10 mph SW | 0% |
| Tuesday Night | 67°F | Mostly Clear | 0 to 10 mph WSW | 0% |
| Wednesday | 93°F | Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 68°F | Mostly Clear | 0 to 5 mph W | 0% |
| Thursday | 93°F | Sunny | 0 to 5 mph WNW | 0% |
| Thursday Night | 67°F | Mostly Clear | 0 to 5 mph WSW | 0% |
| Friday | 95°F | Sunny | 0 to 5 mph WSW | 0% |
| Friday Night | 68°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Saturday | 96°F | Sunny | 0 to 5 mph WSW | 0% |
| Saturday Night | 68°F | Mostly Clear | 0 to 5 mph WSW | 0% |
| Sunday | 95°F | Sunny | 0 to 10 mph WSW | 0% |
| Sunday Night | 66°F | Mostly Clear | 0 to 10 mph SW | 2% |
| Monday | 91°F | Sunny | 0 to 10 mph SW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Charter Oak (34.102, -117.856). Updated through the day.
Growing snapshot for Charter Oak
Last spring frost
Jan 8
First fall frost
Dec 28
Growing season
354 days
Hardiness zone
10a
More local growing data for Charter Oak: nearby ZIP 91740 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Pomona/Fairplex, Ca (5.7 mi from Charter Oak). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.