Bethalto, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bethalto, a village in Madison County, Illinois.
Overnight
65°F
Clear
Clear, with a low around 65. East wind around 2 mph.
7-day forecast for Bethalto
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Clear | 2 mph E | 0% |
| Tuesday | 87°F | Sunny | 5 mph S | 0% |
| Tuesday Night | 67°F | Mostly Clear | 5 mph SE | 0% |
| Wednesday | 89°F | Sunny | 2 to 7 mph S | 12% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 7 mph S | 74% |
| Thursday | 86°F | Showers And Thunderstorms Likely | 6 mph S | 74% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms | 5 mph SE | 30% |
| Friday | 86°F | Chance Showers And Thunderstorms | 5 mph SW | 30% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 5 mph S | 32% |
| Saturday | 88°F | Chance Showers And Thunderstorms then Mostly Sunny | 2 to 6 mph S | 32% |
| Saturday Night | 72°F | Mostly Clear | 7 mph S | 7% |
| Sunday | 91°F | Sunny | 6 to 9 mph S | 6% |
| Sunday Night | 73°F | Mostly Clear | 8 mph S | 5% |
| Monday | 92°F | Mostly Sunny | 6 to 9 mph SW | 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 Aug 4, 2026.