Chapin, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chapin, a village in Morgan County, Illinois.
Today
93°F
Mostly Cloudy
Mostly cloudy, with a high near 93. Southwest wind around 8 mph.
7-day forecast for Chapin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 93°F | Mostly Cloudy | 8 mph SW | 6% |
| Tonight | 69°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph SSW | 31% |
| Sunday | 82°F | Chance Showers And Thunderstorms | 2 to 9 mph NNW | 49% |
| Sunday Night | 61°F | Chance Showers And Thunderstorms | 9 to 13 mph NE | 71% |
| Monday | 69°F | Showers And Thunderstorms Likely | 13 mph NE | 71% |
| Monday Night | 55°F | Chance Rain Showers | 9 to 13 mph NE | 31% |
| Tuesday | 65°F | Slight Chance Rain Showers | 13 mph NE | 24% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 10 mph NNE | 7% |
| Wednesday | 69°F | Mostly Sunny | 9 mph NNE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 3 to 7 mph NNE | 1% |
| Thursday | 72°F | Mostly Sunny | 3 to 7 mph NNE | 3% |
| Thursday Night | 55°F | Partly Cloudy | 2 to 6 mph NE | 3% |
| Friday | 74°F | Mostly Sunny | 3 to 7 mph NE | 5% |
| Friday Night | 55°F | Partly Cloudy | 6 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Chapin (39.767, -90.403). Updated through the day.
Growing snapshot for Chapin
Last spring frost
Apr 17
First fall frost
Oct 21
Growing season
186 days
Hardiness zone
6a
More local growing data for Chapin: nearby ZIP 62628 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Alexander
Concord
Franklin
Jacksonville
Lynnville
Meredosia
Merritt
Murrayville
Riggston
South Jacksonville
Waverly
Woodson
Climate data from the nearest NOAA station, Jacksonville 2, Il (10.3 mi from Chapin). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.