Chapin, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chapin, a village in Morgan County, Illinois.
Today
88°F
Sunny
Sunny, with a high near 88. South wind around 6 mph.
7-day forecast for Chapin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Sunny | 6 mph S | 0% |
| Tonight | 69°F | Partly Cloudy | 6 mph SSE | 4% |
| Wednesday | 87°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 7 mph S | 33% |
| Wednesday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 6 mph SE | 78% |
| Thursday | 83°F | Showers And Thunderstorms | 5 mph SSW | 78% |
| Thursday Night | 65°F | Partly Cloudy | 3 mph SE | 14% |
| Friday | 85°F | Mostly Sunny | 2 mph SSW | 7% |
| Friday Night | 67°F | Chance Showers And Thunderstorms | 2 mph S | 25% |
| Saturday | 88°F | Chance Showers And Thunderstorms then Sunny | 2 to 6 mph SSW | 25% |
| Saturday Night | 71°F | Mostly Clear | 3 to 9 mph S | 7% |
| Sunday | 90°F | Sunny | 9 to 13 mph SSW | 3% |
| Sunday Night | 72°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 10 mph SSW | 15% |
| Monday | 91°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 mph SSW | 15% |
| Monday Night | 73°F | Slight Chance Showers And Thunderstorms | 9 mph SSW | 24% |
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 Aug 4, 2026.