Rentchler, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rentchler, a community in St. Clair County, Illinois.
Overnight
72°F
Clear
Clear, with a low around 72. Southeast wind around 5 mph.
7-day forecast for Rentchler
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 72°F | Clear | 5 mph SE | 3% |
| Saturday | 97°F | Mostly Sunny | 2 to 8 mph SW | 4% |
| Saturday Night | 73°F | Partly Cloudy | 5 mph S | 4% |
| Sunday | 93°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 6 mph W | 20% |
| Sunday Night | 67°F | Showers And Thunderstorms Likely | 5 to 8 mph N | 56% |
| Monday | 80°F | Showers And Thunderstorms Likely | 6 to 12 mph NE | 63% |
| Monday Night | 59°F | Showers And Thunderstorms Likely | 6 to 12 mph N | 58% |
| Tuesday | 72°F | Slight Chance Rain Showers then Partly Sunny | 12 mph N | 21% |
| Tuesday Night | 54°F | Mostly Cloudy | 5 to 12 mph N | 6% |
| Wednesday | 74°F | Mostly Sunny | 7 to 10 mph N | 1% |
| Wednesday Night | 55°F | Partly Cloudy | 2 to 8 mph N | 0% |
| Thursday | 76°F | Mostly Sunny | 3 to 8 mph N | 1% |
| Thursday Night | 57°F | Partly Cloudy | 2 to 8 mph NE | 4% |
| Friday | 78°F | Partly Sunny | 2 to 8 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Rentchler (38.493, -89.869). Updated through the day.
Growing snapshot for Rentchler
Last spring frost
Apr 12
First fall frost
Oct 20
Growing season
189 days
Hardiness zone
7a
More local growing data for Rentchler: nearby ZIP 62221 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Belleville Siu Rsch, Il (3.1 mi from Rentchler). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.