Coal City, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coal City, a village in Grundy County, Illinois.
Tonight
67°F
Showers And Thunderstorms
A chance of showers and thunderstorms before 9pm, then a chance of showers and thunderstorms between 9pm and 11pm, then showers and thunderstorms. Cloudy. Low around 67, with temperatures rising to around 70 overnight. Southeast wind 0 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Coal City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 67°F | Showers And Thunderstorms | 0 to 5 mph SE | 83% |
| Sunday | 71°F | Showers And Thunderstorms | 5 to 15 mph NNE | 81% |
| Sunday Night | 58°F | Chance Rain Showers | 10 to 15 mph NE | 40% |
| Monday | 67°F | Chance Rain Showers | 10 to 15 mph ENE | 52% |
| Monday Night | 54°F | Chance Rain Showers | 10 to 15 mph ENE | 32% |
| Tuesday | 65°F | Chance Rain Showers | 10 to 15 mph NE | 35% |
| Tuesday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 17% |
| Wednesday | 67°F | Partly Sunny | 5 to 10 mph NNE | 12% |
| Wednesday Night | 54°F | Mostly Cloudy | 0 to 5 mph NNE | 5% |
| Thursday | 70°F | Partly Sunny | 0 to 5 mph NNE | 3% |
| Thursday Night | 56°F | Mostly Cloudy | 0 to 5 mph NE | 8% |
| Friday | 73°F | Partly Sunny | 0 to 5 mph NE | 4% |
| Friday Night | 55°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Saturday | 75°F | Mostly Sunny | 0 to 5 mph ENE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Coal City (41.279, -88.280). Updated through the day.
Growing snapshot for Coal City
Last spring frost
Apr 16
First fall frost
Oct 26
Growing season
191 days
Hardiness zone
5b
More local growing data for Coal City: nearby ZIP 60416 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Braceville
Carbon Hill
Diamond
East Brooklyn
Gardner
Godley
Kinsman
Mazon
Morris
South Wilmington
Verona
Climate data from the nearest NOAA station, Channahon Dresden Isl Dam, Il (7.2 mi from Coal City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.