Chapin, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Chapin, IL in one place.
Showers and thunderstorms before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 75. Southeast wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for Chapin, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 14, 2026 8:25 AM CDT.
The active forecast window currently covers Oct 15 to Oct 20, 2026 for Chapin, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 20, 2026
- Latest sync
- Oct 14, 2026 8:25 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Chapin
Tuesday looks like the warmest upcoming period in Chapin at 76 degrees F.
Friday Night is the coolest period ahead with temperatures near 35 degrees F.
The strongest winds are forecast for Friday at about 22 to 28 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 14, 2026 8:25 AM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms. Mostly cloudy, with a low around 47. West wind 10 to 24 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
A chance of rain showers. Partly sunny, with a high near 56. Northwest wind 22 to 28 mph, with gusts as high as 36 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of rain showers before 7pm, then areas of frost. Mostly clear, with a low around 35. North northwest wind 7 to 18 mph, with gusts as high as 25 mph.
Areas of frost before 8am. Sunny, with a high near 59. Southeast wind around 5 mph.
Areas of frost after 5am. Clear, with a low around 36.
Areas of frost before 8am. Sunny, with a high near 70.
Partly cloudy, with a low around 44.
Partly sunny, with a high near 72.
Partly cloudy, with a low around 46.
Mostly sunny, with a high near 76.
Mostly clear, with a low around 50.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
75°F |
10 mph
SE
|
|
Thursday Night
Oct 15
|
Showers And Thunderstorms
|
47°F |
10 to 24 mph
W
|
|
Friday
Oct 16
|
Chance Rain Showers
|
56°F |
22 to 28 mph
NW
|
|
Friday Night
Oct 16
|
Slight Chance Rain Showers then Areas Of Frost
|
35°F |
7 to 18 mph
NNW
|
|
Saturday
Oct 17
|
Areas Of Frost then Sunny
|
59°F |
5 mph
SE
|
|
Saturday Night
Oct 17
|
Clear then Areas Of Frost
|
36°F |
2 to 7 mph
S
|
|
Sunday
Oct 18
|
Areas Of Frost then Sunny
|
70°F |
7 to 12 mph
S
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
44°F |
9 mph
S
|
|
Monday
Oct 19
|
Partly Sunny
|
72°F |
9 mph
SSW
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
46°F |
2 to 6 mph
S
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
76°F |
3 to 7 mph
SSE
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
50°F |
6 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Chapin.