Monrovia, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monrovia, a community in Frederick County, Maryland.
Tonight
57°F
Partly Cloudy
Partly cloudy, with a low around 57. Northeast wind around 9 mph.
7-day forecast for Monrovia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Partly Cloudy | 9 mph NE | 2% |
| Saturday | 77°F | Partly Sunny | 9 mph E | 5% |
| Saturday Night | 65°F | Mostly Cloudy then Scattered Rain Showers | 9 mph SE | 30% |
| Sunday | 80°F | Rain Showers Likely | 9 to 14 mph S | 68% |
| Sunday Night | 63°F | Showers And Thunderstorms Likely | 3 to 10 mph NW | 68% |
| Monday | 71°F | Chance Rain Showers | 8 to 13 mph NE | 39% |
| Monday Night | 59°F | Chance Rain Showers | 7 to 12 mph NE | 54% |
| Tuesday | 63°F | Rain Showers Likely | 13 mph NE | 63% |
| Tuesday Night | 53°F | Rain Showers Likely | 10 to 14 mph NE | 62% |
| Wednesday | 59°F | Rain Showers Likely | 14 mph NE | 55% |
| Wednesday Night | 53°F | Chance Showers And Thunderstorms | 9 to 13 mph NE | 51% |
| Thursday | 62°F | Chance Showers And Thunderstorms | 8 to 13 mph NE | 48% |
| Thursday Night | 53°F | Chance Rain Showers | 3 to 7 mph N | 36% |
| Friday | 66°F | Slight Chance Rain Showers | 6 to 9 mph N | 22% |
Forecast source: National Weather Service (api.weather.gov) for Monrovia (39.359, -77.275). Updated through the day.
Growing snapshot for Monrovia
Last spring frost
Apr 14
First fall frost
Oct 29
Growing season
196 days
Hardiness zone
7a
More local growing data for Monrovia: nearby ZIP 21770 weather · frost dates · planting calendar · Maryland frost dates
Nearby towns & communities
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Frederick
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Green Valley
Jefferson
Lewistown
Libertytown
Linganore
Middletown
Mount Airy
Myersville
New Market
Point of Rocks
Rosemont
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Union Bridge
Urbana
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Climate data from the nearest NOAA station, Damascus 3 Ssw, Md (6 mi from Monrovia). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.