Placentia, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Placentia, a city in Orange County, California.
Today
89°F
Patchy Fog then Sunny
Patchy fog before 11am. Sunny, with a high near 89. Southwest wind 0 to 10 mph.
7-day forecast for Placentia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Patchy Fog then Sunny | 0 to 10 mph SW | 0% |
| Tonight | 67°F | Partly Cloudy then Patchy Fog | 0 to 10 mph SW | 0% |
| Wednesday | 89°F | Patchy Fog then Mostly Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 68°F | Partly Cloudy then Patchy Fog | 0 to 10 mph SW | 0% |
| Thursday | 91°F | Patchy Fog then Sunny | 0 to 10 mph SW | 0% |
| Thursday Night | 69°F | Mostly Clear then Patchy Fog | 0 to 10 mph SW | 0% |
| Friday | 89°F | Patchy Fog then Sunny | 0 to 10 mph S | 0% |
| Friday Night | 69°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Saturday | 91°F | Sunny | 0 to 10 mph SW | 0% |
| Saturday Night | 69°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Sunday | 90°F | Sunny | 0 to 10 mph SW | 0% |
| Sunday Night | 68°F | Mostly Clear | 0 to 10 mph SW | 1% |
| Monday | 88°F | Sunny | 0 to 10 mph SW | 1% |
| Monday Night | 67°F | Mostly Clear | 0 to 10 mph S | 2% |
Forecast source: National Weather Service (api.weather.gov) for Placentia (33.881, -117.855). Updated through the day.
Growing snapshot for Placentia
Growing season
365 days
Hardiness zone
10b
More local growing data for Placentia: nearby ZIP 92870 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Anaheim, Ca (1.3 mi from Placentia). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.