Thebes, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thebes, a village in Scott County, Illinois.
Today
87°F
Sunny
Sunny. High near 87, with temperatures falling to around 85 in the afternoon. East northeast wind around 2 mph.
7-day forecast for Thebes
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 2 mph ENE | 0% |
| Tonight | 66°F | Mostly Clear | 2 mph ENE | 0% |
| Wednesday | 89°F | Sunny | 2 mph S | 0% |
| Wednesday Night | 70°F | Mostly Clear | 3 mph SSE | 1% |
| Thursday | 89°F | Slight Chance Showers And Thunderstorms | 1 to 6 mph SSW | 20% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 1 to 6 mph S | 50% |
| Friday | 89°F | Chance Showers And Thunderstorms | 5 mph SSW | 50% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 3 mph SSW | 42% |
| Saturday | 89°F | Chance Showers And Thunderstorms | 3 mph SSW | 35% |
| Saturday Night | 71°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph S | 20% |
| Sunday | 90°F | Sunny | 2 to 7 mph SSW | 10% |
| Sunday Night | 72°F | Mostly Clear | 2 to 6 mph SSW | 6% |
| Monday | 92°F | Sunny | 2 to 8 mph SSW | 6% |
| Monday Night | 73°F | Mostly Clear | 3 to 7 mph SSW | 4% |
Forecast source: National Weather Service (api.weather.gov) for Thebes (37.212, -89.451). Updated through the day.
Growing snapshot for Thebes
Last spring frost
Apr 5
First fall frost
Oct 25
Growing season
201 days
Hardiness zone
7a
More local growing data for Thebes: nearby ZIP 63742 weather · frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Cape Girardeau Muni Ap, Mo (8.2 mi from Thebes). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.