Rentchler, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rentchler, a community in St. Clair County, Illinois.
Tonight
54°F
Rain
Rain and a slight chance of thunderstorms before 3am, then a chance of rain showers between 3am and 4am, then a slight chance of rain between 4am and 5am, then a chance of rain showers. Cloudy, with a low around 54. South wind 8 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 100%.
7-day forecast for Rentchler
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Rain | 8 to 15 mph S | 96% |
| Wednesday | 64°F | Chance Rain Showers then Mostly Cloudy | 6 to 13 mph W | 11% |
| Wednesday Night | 44°F | Partly Cloudy | 5 mph SW | 0% |
| Thursday | 67°F | Sunny | 3 to 10 mph W | 1% |
| Thursday Night | 45°F | Mostly Cloudy | 3 mph NW | 7% |
| Friday | 58°F | Mostly Cloudy | 5 to 10 mph NW | 6% |
| Friday Night | 39°F | Partly Cloudy | 1 to 6 mph N | 1% |
| Saturday | 56°F | Partly Sunny | 1 to 5 mph NW | 0% |
| Saturday Night | 36°F | Partly Cloudy | 1 mph NW | 0% |
| Sunday | 62°F | Sunny | 1 to 7 mph W | 7% |
| Sunday Night | 36°F | Mostly Clear | 3 mph NW | 5% |
| Monday | 66°F | Sunny | 1 to 7 mph W | 2% |
| Monday Night | 40°F | Mostly Clear | 3 mph SW | 1% |
| Tuesday | 69°F | Sunny | 2 to 6 mph W | 0% |
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 Nov 4, 2026.