Madison, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Madison, a city in Madison County, Illinois.
This Afternoon
98°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Sunny, with a high near 98. Heat index values as high as 106. Southeast wind around 3 mph. Chance of precipitation is 30%.
7-day forecast for Madison
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 98°F | Chance Showers And Thunderstorms | 3 mph SE | 26% |
| Tonight | 74°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 5 mph SE | 24% |
| Saturday | 99°F | Mostly Sunny | 3 to 8 mph SW | 6% |
| Saturday Night | 75°F | Partly Cloudy | 5 mph S | 2% |
| Sunday | 95°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 3 to 7 mph W | 20% |
| Sunday Night | 68°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 8 mph N | 60% |
| Monday | 82°F | Rain Showers Likely | 5 to 10 mph N | 70% |
| Monday Night | 62°F | Showers And Thunderstorms Likely | 7 to 12 mph N | 70% |
| Tuesday | 73°F | Chance Rain Showers then Mostly Cloudy | 12 mph N | 27% |
| Tuesday Night | 56°F | Mostly Cloudy | 5 to 12 mph N | 6% |
| Wednesday | 76°F | Mostly Sunny | 6 to 9 mph N | 2% |
| Wednesday Night | 57°F | Partly Cloudy | 3 to 8 mph N | 2% |
| Thursday | 77°F | Mostly Sunny | 3 to 8 mph N | 3% |
| Thursday Night | 59°F | Partly Cloudy | 3 to 8 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Madison (38.686, -90.102). Updated through the day.
Growing snapshot for Madison
Last spring frost
Apr 8
First fall frost
Oct 26
Growing season
200 days
Hardiness zone
7a
More local growing data for Madison: nearby ZIP 62040 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Alhambra
Alton
Bethalto
Collinsville
East Alton
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Glen Carbon
Godfrey
Granite City
Grantfork
Hamel
Hartford
Highland
Holiday Shores
Livingston
Marine
Maryville
Mitchell
Moro
New Douglas
Pontoon Beach
Prairietown
Rosewood Heights
Roxana
South Roxana
St. Jacob
Troy
Venice
Williamson
Wood River
Climate data from the nearest NOAA station, Cahokia St Louis Ap, Il (10.4 mi from Madison). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.