Rossmoor, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rossmoor, a community in Orange County, California.
Today
78°F
Mostly Sunny
Mostly sunny, with a high near 78. South wind 0 to 10 mph.
7-day forecast for Rossmoor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Mostly Sunny | 0 to 10 mph S | 0% |
| Tonight | 67°F | Mostly Cloudy | 0 to 5 mph S | 0% |
| Sunday | 76°F | Partly Sunny | 0 to 10 mph E | 1% |
| Sunday Night | 67°F | Mostly Cloudy | 0 to 10 mph S | 1% |
| Monday | 75°F | Mostly Sunny | 5 to 10 mph S | 1% |
| Monday Night | 66°F | Mostly Cloudy | 0 to 10 mph SW | 1% |
| Tuesday | 76°F | Mostly Sunny | 0 to 10 mph S | 1% |
| Tuesday Night | 66°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Wednesday | 80°F | Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 67°F | Partly Cloudy | 0 to 10 mph SW | 0% |
| Thursday | 81°F | Mostly Sunny | 0 to 10 mph SW | 2% |
| Thursday Night | 68°F | Partly Cloudy | 0 to 10 mph SW | 3% |
| Friday | 83°F | Mostly Sunny | 0 to 10 mph SW | 2% |
| Friday Night | 69°F | Partly Cloudy | 0 to 10 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Rossmoor (33.789, -118.080). Updated through the day.
Growing snapshot for Rossmoor
Growing season
365 days
Hardiness zone
10a
More local growing data for Rossmoor: nearby ZIP 90720 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Long Beach Daugherty Fld, Ca (4.9 mi from Rossmoor). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.