Chapin, IL Weather Forecast
Local 7-day forecast
Patchy Fog
Track current conditions, temperature changes, wind, and the full daily outlook for Chapin, IL in one place.
Patchy fog. Mostly clear, with a low around 60. North northeast wind around 5 mph.
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: Aug 3, 2026 7:11 AM CDT.
The active forecast window currently covers Aug 3 to Aug 9, 2026 for Chapin, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 3 to Aug 9, 2026
- Latest sync
- Aug 3, 2026 7:11 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Chapin
Sunday looks like the warmest upcoming period in Chapin at 87 degrees F.
Overnight is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Sunday at about 7 to 10 mph SSW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 3, 2026 7:11 AM CDT
- Coverage
- 7 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
Patchy fog before 10am. Mostly sunny, with a high near 82. Northeast wind around 5 mph.
Mostly clear, with a low around 61. East southeast wind around 6 mph.
Sunny, with a high near 84. South southeast wind around 6 mph.
Mostly clear, with a low around 62. Southeast wind around 5 mph.
Sunny, with a high near 85. South wind 3 to 7 mph.
A chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 66. South southeast wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Chance of precipitation is 70%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms. Partly sunny, with a high near 82.
A chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 67.
Mostly sunny, with a high near 87.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Aug 3
|
Patchy Fog
|
60°F |
5 mph
NNE
|
|
Monday
Aug 3
|
Patchy Fog then Mostly Sunny
|
82°F |
5 mph
NE
|
|
Monday Night
Aug 3
|
Mostly Clear
|
61°F |
6 mph
ESE
|
|
Tuesday
Aug 4
|
Sunny
|
84°F |
6 mph
SSE
|
|
Tuesday Night
Aug 4
|
Mostly Clear
|
62°F |
5 mph
SE
|
|
Wednesday
Aug 5
|
Sunny
|
85°F |
3 to 7 mph
S
|
|
Wednesday Night
Aug 5
|
Chance Showers And Thunderstorms
|
66°F |
6 mph
SSE
|
|
Thursday
Aug 6
|
Showers And Thunderstorms Likely
|
81°F |
7 mph
SW
|
|
Thursday Night
Aug 6
|
Chance Showers And Thunderstorms
|
65°F |
2 to 6 mph
NW
|
|
Friday
Aug 7
|
Slight Chance Showers And Thunderstorms
|
82°F |
5 mph
SSW
|
|
Friday Night
Aug 7
|
Chance Showers And Thunderstorms
|
64°F |
5 mph
SE
|
|
Saturday
Aug 8
|
Slight Chance Showers And Thunderstorms
|
84°F |
3 to 7 mph
SSW
|
|
Saturday Night
Aug 8
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
67°F |
6 mph
S
|
|
Sunday
Aug 9
|
Mostly Sunny
|
87°F |
7 to 10 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Chapin.