Norco, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Norco, a city in Riverside County, California.
This Afternoon
86°F
Sunny
Sunny, with a high near 86. West wind 5 to 15 mph, with gusts as high as 25 mph.
7-day forecast for Norco
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 86°F | Sunny | 5 to 15 mph W | 0% |
| Tonight | 64°F | Partly Cloudy | 0 to 10 mph NW | 0% |
| Sunday | 83°F | Mostly Sunny | 0 to 15 mph W | 0% |
| Sunday Night | 64°F | Partly Cloudy | 5 to 15 mph W | 2% |
| Monday | 80°F | Mostly Sunny | 0 to 15 mph W | 2% |
| Monday Night | 62°F | Mostly Clear | 0 to 10 mph W | 0% |
| Tuesday | 82°F | Sunny | 0 to 10 mph W | 0% |
| Tuesday Night | 63°F | Clear | 0 to 10 mph W | 0% |
| Wednesday | 90°F | Sunny | 0 to 10 mph W | 0% |
| Wednesday Night | 66°F | Mostly Clear | 0 to 10 mph W | 0% |
| Thursday | 92°F | Sunny | 0 to 10 mph W | 1% |
| Thursday Night | 67°F | Mostly Clear | 0 to 10 mph W | 1% |
| Friday | 91°F | Sunny | 0 to 10 mph W | 2% |
| Friday Night | 67°F | Mostly Clear | 0 to 10 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Norco (33.926, -117.552). Updated through the day.
Growing snapshot for Norco
Last spring frost
Jan 17
First fall frost
Dec 19
Growing season
335 days
Hardiness zone
10a
More local growing data for Norco: nearby ZIP 92860 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Chino Ap, Ca (6.1 mi from Norco). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.