Monrovia, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monrovia, a city in Los Angeles County, California.
Today
75°F
Mostly Sunny
Mostly sunny, with a high near 75. Southwest wind around 5 mph.
7-day forecast for Monrovia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Mostly Sunny | 5 mph SW | 0% |
| Tonight | 54°F | Mostly Clear | 0 to 5 mph WNW | 0% |
| Wednesday | 75°F | Sunny | 0 to 5 mph NW | 0% |
| Wednesday Night | 57°F | Mostly Clear | 5 mph N | 0% |
| Thursday | 80°F | Sunny | 0 to 5 mph N | 0% |
| Thursday Night | 57°F | Mostly Clear | 0 to 10 mph NNW | 0% |
| Friday | 82°F | Sunny | 0 to 10 mph NE | 0% |
| Friday Night | 60°F | Clear | 0 to 15 mph N | 0% |
| Saturday | 85°F | Sunny | 0 to 10 mph NNE | 0% |
| Saturday Night | 62°F | Clear | 0 to 15 mph N | 0% |
| Sunday | 86°F | Sunny | 0 to 5 mph ENE | 0% |
| Sunday Night | 64°F | Partly Cloudy | 0 to 10 mph NNE | 0% |
| Monday | 83°F | Mostly Sunny | 0 to 5 mph S | 0% |
| Monday Night | 62°F | Partly Cloudy | 0 to 5 mph NNE | 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 Nov 3, 2026.