Mount Sterling, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Sterling, a city in Brown County, Illinois.
This Afternoon
69°F
Light Rain
Rain and a slight chance of thunderstorms. Cloudy, with a high near 69. South wind around 21 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.
7-day forecast for Mount Sterling
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Light Rain | 21 mph S | 100% |
| Tonight | 52°F | Light Rain Likely | 10 to 18 mph S | 57% |
| Wednesday | 57°F | Chance Rain Showers then Mostly Cloudy | 13 to 17 mph SW | 12% |
| Wednesday Night | 44°F | Mostly Cloudy | 10 mph SW | 1% |
| Thursday | 58°F | Mostly Sunny | 9 to 14 mph W | 8% |
| Thursday Night | 43°F | Mostly Cloudy | 7 mph NW | 12% |
| Friday | 54°F | Mostly Cloudy | 9 mph N | 8% |
| Friday Night | 37°F | Partly Cloudy | 1 to 6 mph N | 2% |
| Saturday | 53°F | Mostly Sunny | 3 mph NW | 1% |
| Saturday Night | 36°F | Mostly Clear | 3 mph W | 1% |
| Sunday | 59°F | Sunny | 3 to 8 mph W | 8% |
| Sunday Night | 36°F | Mostly Clear | 5 mph W | 4% |
| Monday | 64°F | Sunny | 3 to 10 mph SW | 1% |
| Monday Night | 41°F | Mostly Clear | 6 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Mount Sterling (39.985, -90.764). Updated through the day.
Growing snapshot for Mount Sterling
Last spring frost
Apr 18
First fall frost
Oct 15
Growing season
179 days
Hardiness zone
6a
More local growing data for Mount Sterling: nearby ZIP 62353 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Perry 6 Nw, Il (12.1 mi from Mount Sterling). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.