Old Monroe, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Old Monroe, a city in Lincoln County, Missouri.
Today
96°F
Partly Sunny
Partly sunny, with a high near 96. Heat index values as high as 100. Southwest wind 5 to 8 mph.
7-day forecast for Old Monroe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 96°F | Partly Sunny | 5 to 8 mph SW | 4% |
| Tonight | 71°F | Partly Cloudy | 3 mph SW | 5% |
| Sunday | 90°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 2 to 6 mph NW | 45% |
| Sunday Night | 65°F | Showers And Thunderstorms Likely | 5 to 8 mph N | 73% |
| Monday | 75°F | Showers And Thunderstorms Likely | 6 to 10 mph NE | 73% |
| Monday Night | 57°F | Chance Rain Showers | 6 to 10 mph NE | 27% |
| Tuesday | 69°F | Slight Chance Rain Showers then Partly Sunny | 10 mph NE | 19% |
| Tuesday Night | 52°F | Mostly Cloudy | 3 to 9 mph N | 3% |
| Wednesday | 73°F | Mostly Sunny | 5 to 8 mph N | 0% |
| Wednesday Night | 54°F | Partly Cloudy | 1 to 6 mph NE | 0% |
| Thursday | 75°F | Mostly Sunny | 2 to 6 mph NE | 3% |
| Thursday Night | 57°F | Partly Cloudy | 1 to 6 mph NE | 4% |
| Friday | 77°F | Partly Sunny | 2 to 6 mph NE | 7% |
| Friday Night | 57°F | Partly Cloudy | 1 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Old Monroe (38.934, -90.749). Updated through the day.
Growing snapshot for Old Monroe
Last spring frost
Apr 20
First fall frost
Oct 20
Growing season
181 days
Hardiness zone
6b
More local growing data for Old Monroe: nearby ZIP 63369 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Cave
Chain of Rocks
Elsberry
Foley
Fountain N' Lakes
Hawk Point
Moscow Mills
Silex
Troy
Whiteside
Winfield
Climate data from the nearest NOAA station, Elsberry 1 S, Mo (15 mi from Old Monroe). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.