Walnut, IL Weather Forecast
Local 7-day forecast
Patchy Fog then Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Walnut, IL in one place.
Patchy fog before 9am. Sunny, with a high near 92. Heat index values as high as 100. West wind around 0 mph.
Local Weather Overview
This forecast page for Walnut, 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: Jul 14, 2026 6:06 PM CDT.
The active forecast window currently covers Jul 15 to Jul 20, 2026 for Walnut, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 15 to Jul 20, 2026
- Latest sync
- Jul 14, 2026 6:06 PM CDT
- Forecast office
- DVN
- Source
- NOAA / NWS
Daily Outlook
This Week in Walnut
Wednesday looks like the warmest upcoming period in Walnut at 92 degrees F.
Monday Night is the coolest period ahead with temperatures near 68 degrees F.
The strongest winds are forecast for Monday at about 5 to 15 mph SW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 6:06 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- DVN
- Radar station
- KDVN
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 71. Southwest wind around 0 mph.
A chance of rain showers between 1pm and 4pm, then a chance of showers and thunderstorms. Sunny, with a high near 92. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 71. Chance of precipitation is 30%.
A chance of showers and thunderstorms between 7am and 1pm, then showers and thunderstorms likely. Mostly sunny, with a high near 90. Chance of precipitation is 60%.
Showers and thunderstorms likely before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 72. Chance of precipitation is 60%.
Sunny, with a high near 91.
Mostly clear, with a low around 70.
Sunny, with a high near 89.
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 69.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89.
A slight chance of rain showers. Partly cloudy, with a low around 68.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Jul 15
|
Patchy Fog then Sunny
|
92°F |
0 mph
|
|
Wednesday Night
Jul 15
|
Partly Cloudy
|
71°F |
0 mph
|
|
Thursday
Jul 16
|
Sunny then Chance Showers And Thunderstorms
|
92°F |
0 to 5 mph
SW
|
|
Thursday Night
Jul 16
|
Chance Showers And Thunderstorms then Mostly Clear
|
71°F |
5 mph
S
|
|
Friday
Jul 17
|
Chance Showers And Thunderstorms
|
90°F |
5 mph
SW
|
|
Friday Night
Jul 17
|
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
|
72°F |
5 mph
SW
|
|
Saturday
Jul 18
|
Sunny
|
91°F |
5 to 10 mph
W
|
|
Saturday Night
Jul 18
|
Mostly Clear
|
70°F |
5 to 10 mph
NW
|
|
Sunday
Jul 19
|
Sunny
|
89°F |
5 mph
E
|
|
Sunday Night
Jul 19
|
Mostly Clear then Slight Chance Showers And Thunderstorms
|
69°F |
5 mph
S
|
|
Monday
Jul 20
|
Slight Chance Showers And Thunderstorms
|
89°F |
5 to 15 mph
SW
|
|
Monday Night
Jul 20
|
Slight Chance Rain Showers
|
68°F |
10 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Walnut.