Mount Sterling, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Sterling, a city in Brown County, Illinois.
Today
88°F
Sunny
Sunny, with a high near 88. South wind around 7 mph.
7-day forecast for Mount Sterling
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Sunny | 7 mph S | 0% |
| Tonight | 69°F | Partly Cloudy | 5 mph S | 14% |
| Wednesday | 85°F | Mostly Sunny then Scattered Showers And Thunderstorms | 5 mph S | 46% |
| Wednesday Night | 67°F | Scattered Showers And Thunderstorms then Showers And Thunderstorms | 6 mph NE | 89% |
| Thursday | 82°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph SW | 89% |
| Thursday Night | 65°F | Partly Cloudy | 3 mph SE | 11% |
| Friday | 84°F | Mostly Sunny | 2 mph S | 6% |
| Friday Night | 66°F | Chance Showers And Thunderstorms | 2 mph S | 30% |
| Saturday | 88°F | Slight Chance Showers And Thunderstorms then Sunny | 2 to 6 mph SW | 24% |
| Saturday Night | 71°F | Mostly Clear | 5 to 9 mph S | 7% |
| Sunday | 89°F | Sunny | 12 mph SW | 3% |
| Sunday Night | 72°F | Mostly Clear | 10 mph S | 13% |
| Monday | 90°F | Mostly Sunny | 10 mph SW | 13% |
| Monday Night | 73°F | Slight Chance Showers And Thunderstorms | 9 mph S | 26% |
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 Aug 4, 2026.