Coal City, IL Weather & Growing Conditions
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. South wind around 5 mph, with gusts as high as 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 mph S | 6% |
| Tonight | 67°F | Mostly Cloudy | 5 mph S | 6% |
| Wednesday | 82°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 49% |
| Wednesday Night | 66°F | Showers And Thunderstorms | 0 to 5 mph W | 89% |
| Thursday | 81°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 79% |
| Thursday Night | 64°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph ENE | 42% |
| Friday | 83°F | Mostly Sunny | 0 mph | 5% |
| Friday Night | 65°F | Mostly Clear | 0 mph | 9% |
| Saturday | 86°F | Mostly Sunny | 0 to 5 mph SSW | 12% |
| Saturday Night | 70°F | Partly Cloudy | 0 to 5 mph SSW | 12% |
| Sunday | 88°F | Mostly Sunny | 5 to 10 mph SW | 11% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 5 mph SSW | 30% |
| Monday | 87°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 mph SSW | 30% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 5 mph WSW | 39% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Coal City, IL
Last spring frost
Apr 16
First fall frost
Oct 26
Growing season
191 days
Hardiness zone
5b
Explore more for Coal City, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Channahon Dresden Isl Dam, Il (7.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.