Bethalto, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bethalto, a village in Madison County, Illinois.
Today
97°F
Partly Sunny
Partly sunny, with a high near 97. Southwest wind 3 to 8 mph.
7-day forecast for Bethalto
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 97°F | Partly Sunny | 3 to 8 mph SW | 6% |
| Tonight | 72°F | Partly Cloudy | 5 mph SW | 4% |
| Sunday | 92°F | Chance Rain Showers then Chance Showers And Thunderstorms | 3 to 8 mph NW | 33% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 7 to 12 mph NE | 63% |
| Monday | 78°F | Showers And Thunderstorms Likely | 8 to 13 mph NE | 66% |
| Monday Night | 58°F | Chance Showers And Thunderstorms | 8 to 13 mph NE | 52% |
| Tuesday | 71°F | Slight Chance Rain Showers then Partly Sunny | 13 mph NE | 19% |
| Tuesday Night | 53°F | Mostly Cloudy | 6 to 13 mph N | 8% |
| Wednesday | 74°F | Mostly Sunny | 8 to 12 mph N | 1% |
| Wednesday Night | 54°F | Partly Cloudy | 3 to 10 mph N | 0% |
| Thursday | 77°F | Mostly Sunny | 5 to 9 mph N | 1% |
| Thursday Night | 56°F | Partly Cloudy | 3 to 9 mph NE | 3% |
| Friday | 78°F | Mostly Sunny | 5 to 9 mph NE | 5% |
| Friday Night | 56°F | Partly Cloudy | 5 to 8 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Bethalto (38.902, -90.045). Updated through the day.
Growing snapshot for Bethalto
Last spring frost
Apr 4
First fall frost
Nov 5
Growing season
214 days
Hardiness zone
6b
More local growing data for Bethalto: nearby ZIP 62010 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Alton - Melvin Price L&D, Il (6.5 mi from Bethalto). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.