Thebes, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thebes, a village in Scott County, Illinois.
Today
99°F
Sunny
Sunny. High near 99, with temperatures falling to around 96 in the afternoon. Southwest wind 1 to 6 mph.
7-day forecast for Thebes
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Sunny | 1 to 6 mph SW | 1% |
| Tonight | 72°F | Mostly Clear | 5 mph SSW | 0% |
| Sunday | 97°F | Mostly Sunny | 2 to 6 mph WSW | 0% |
| Sunday Night | 71°F | Partly Cloudy then Chance Showers And Thunderstorms | 3 mph NNW | 25% |
| Monday | 88°F | Chance Showers And Thunderstorms | 3 to 7 mph NNE | 52% |
| Monday Night | 63°F | Chance Showers And Thunderstorms | 5 to 8 mph NNE | 52% |
| Tuesday | 78°F | Chance Showers And Thunderstorms | 7 to 12 mph N | 32% |
| Tuesday Night | 58°F | Partly Cloudy | 5 to 12 mph N | 11% |
| Wednesday | 77°F | Mostly Sunny | 8 mph N | 1% |
| Wednesday Night | 57°F | Partly Cloudy | 2 to 7 mph N | 1% |
| Thursday | 78°F | Mostly Sunny | 3 to 7 mph NNE | 3% |
| Thursday Night | 59°F | Partly Cloudy | 6 mph NNE | 3% |
| Friday | 79°F | Mostly Sunny | 3 to 7 mph NNE | 3% |
| Friday Night | 58°F | Partly Cloudy | 6 mph NNE | 3% |
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 Sep 19, 2026.