Monrovia, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monrovia, a city in Los Angeles County, California.
Overnight
65°F
Partly Cloudy
Partly cloudy, with a low around 65. Southwest wind around 0 mph.
7-day forecast for Monrovia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Partly Cloudy | 0 mph | 0% |
| Tuesday | 95°F | Sunny | 0 to 5 mph SW | 0% |
| Tuesday Night | 64°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Wednesday | 94°F | Sunny | 0 to 5 mph SSW | 0% |
| Wednesday Night | 65°F | Mostly Clear | 0 to 5 mph SSW | 0% |
| Thursday | 94°F | Sunny | 0 to 5 mph SSW | 0% |
| Thursday Night | 66°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Friday | 94°F | Sunny | 0 to 5 mph SW | 0% |
| Friday Night | 67°F | Mostly Clear | 0 to 5 mph WNW | 0% |
| Saturday | 97°F | Sunny | 0 to 5 mph SW | 0% |
| Saturday Night | 67°F | Mostly Clear | 0 to 5 mph SSW | 0% |
| Sunday | 96°F | Sunny | 0 to 5 mph SSW | 0% |
| Sunday Night | 66°F | Mostly Clear | 0 to 5 mph S | 2% |
| Monday | 92°F | Sunny | 0 to 5 mph S | 2% |
Forecast source: National Weather Service (api.weather.gov) for Monrovia (34.164, -117.985). Updated through the day.
Growing snapshot for Monrovia
Last spring frost
Apr 28
First fall frost
Nov 15
Growing season
199 days
Hardiness zone
10a
More local growing data for Monrovia: nearby ZIP 91008 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Mt Wilson Cbs, Ca (7.9 mi from Monrovia). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.