Chester, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chester, a city in Randolph County, Illinois.
Overnight
67°F
Patchy Fog
Patchy fog. Clear, with a low around 67. Southwest wind around 1 mph.
7-day forecast for Chester
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 67°F | Patchy Fog | 1 mph SW | 0% |
| Tuesday | 86°F | Patchy Fog then Sunny | 0 to 3 mph E | 0% |
| Tuesday Night | 65°F | Mostly Clear | 2 mph SE | 0% |
| Wednesday | 91°F | Sunny | 1 to 5 mph S | 2% |
| Wednesday Night | 69°F | Partly Cloudy then Chance Showers And Thunderstorms | 6 mph S | 31% |
| Thursday | 88°F | Chance Showers And Thunderstorms | 5 mph S | 49% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms | 3 mph S | 59% |
| Friday | 87°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 mph SW | 59% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 2 mph SW | 41% |
| Saturday | 89°F | Chance Showers And Thunderstorms | 3 mph S | 41% |
| Saturday Night | 70°F | Partly Cloudy | 5 mph S | 13% |
| Sunday | 91°F | Sunny | 3 to 7 mph S | 8% |
| Sunday Night | 72°F | Mostly Clear | 5 to 8 mph S | 4% |
| Monday | 93°F | Sunny | 5 to 8 mph S | 4% |
Forecast source: National Weather Service (api.weather.gov) for Chester (37.926, -89.828). Updated through the day.
Growing snapshot for Chester
Last spring frost
Apr 8
First fall frost
Oct 30
Growing season
202 days
Hardiness zone
7a
More local growing data for Chester: nearby ZIP 62233 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Kaskaskia Rvr Navigation Lock, Il (9.1 mi from Chester). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.