Chapin, IL Weather & Growing Conditions
This Afternoon
90°F
Mostly Sunny
Mostly sunny, with a high near 90. East wind around 6 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 90°F | Mostly Sunny | 6 mph E | 10% |
| Tonight | 72°F | Partly Cloudy | 8 mph SE | 12% |
| Saturday | 92°F | Partly Sunny | 6 to 9 mph SW | 7% |
| Saturday Night | 69°F | Mostly Cloudy then Chance Showers And Thunderstorms | 7 mph SSW | 34% |
| Sunday | 84°F | Rain Showers Likely | 2 to 9 mph NW | 70% |
| Sunday Night | 61°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 8 to 12 mph NE | 71% |
| Monday | 70°F | Showers And Thunderstorms Likely | 12 mph NE | 71% |
| Monday Night | 56°F | Chance Showers And Thunderstorms | 8 to 13 mph NE | 43% |
| Tuesday | 66°F | Chance Rain Showers then Mostly Cloudy | 12 mph NNE | 33% |
| Tuesday Night | 51°F | Mostly Cloudy | 5 to 9 mph NNE | 4% |
| Wednesday | 70°F | Mostly Sunny | 8 mph NNE | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 2 to 6 mph NNE | 0% |
| Thursday | 71°F | Mostly Sunny | 2 to 6 mph NNE | 4% |
| Thursday Night | 55°F | Partly Cloudy | 5 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Chapin, IL
Last spring frost
Apr 17
First fall frost
Oct 21
Growing season
186 days
Hardiness zone
6a
Explore more for Chapin, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Jacksonville 2, Il (10.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.