Monrovia, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monrovia, a city in Los Angeles County, California.
This Afternoon
84°F
Sunny
Sunny, with a high near 84. Southwest wind around 5 mph.
7-day forecast for Monrovia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 84°F | Sunny | 5 mph SW | 0% |
| Tonight | 61°F | Mostly Clear | 0 to 5 mph NNE | 0% |
| Saturday | 87°F | Sunny | 0 to 5 mph SSW | 0% |
| Saturday Night | 63°F | Patchy Fog | 0 to 5 mph SE | 0% |
| Sunday | 86°F | Patchy Fog then Partly Sunny | 0 to 5 mph S | 0% |
| Sunday Night | 61°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Monday | 83°F | Mostly Sunny | 0 to 5 mph SSW | 1% |
| Monday Night | 61°F | Mostly Clear | 0 to 5 mph SW | 1% |
| Tuesday | 85°F | Sunny | 0 to 5 mph SSW | 0% |
| Tuesday Night | 64°F | Clear | 0 to 5 mph NNW | 0% |
| Wednesday | 92°F | Sunny | 0 to 5 mph SW | 1% |
| Wednesday Night | 67°F | Mostly Clear | 0 to 5 mph S | 3% |
| Thursday | 93°F | Sunny | 0 to 5 mph SSW | 3% |
| Thursday Night | 68°F | Mostly Clear | 0 to 5 mph NNW | 1% |
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 Sep 19, 2026.