Washington, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Washington, IL in one place.
Sunny, with a high near 91. East wind around 2 mph.
Local Weather Overview
This forecast page for Washington, 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 6:03 PM CDT.
The active forecast window currently covers Jul 14 to Jul 20, 2026 for Washington, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 14 to Jul 20, 2026
- Latest sync
- Jul 14, 2026 6:03 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Washington
Wednesday looks like the warmest upcoming period in Washington at 92 degrees F.
Monday Night is the coolest period ahead with temperatures near 69 degrees F.
The strongest winds are forecast for Monday at about 6 to 12 mph SW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 6:03 PM 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 after 3am. Clear, with a low around 71. South southeast wind around 2 mph.
Patchy fog before 8am. Sunny, with a high near 92. Heat index values as high as 101. West southwest wind around 2 mph.
Mostly clear, with a low around 72. South wind around 2 mph.
A chance of rain showers between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 91. South wind 0 to 3 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 72. South wind around 3 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Showers and thunderstorms likely after 7am. Mostly sunny, with a high near 89. Southwest wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms likely before 1am. Partly cloudy, with a low around 72. Chance of precipitation is 70%.
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 91.
A slight chance of showers and thunderstorms before 1am. Mostly clear, with a low around 71.
Sunny, with a high near 89.
Mostly clear, with a low around 70.
A chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 90.
A chance of rain showers. Partly cloudy, with a low around 69.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Jul 14
|
Sunny
|
91°F |
2 mph
E
|
|
Tonight
Jul 14
|
Clear then Patchy Fog
|
71°F |
2 mph
SSE
|
|
Wednesday
Jul 15
|
Patchy Fog then Sunny
|
92°F |
2 mph
WSW
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
72°F |
2 mph
S
|
|
Thursday
Jul 16
|
Mostly Sunny then Chance Showers And Thunderstorms
|
91°F |
0 to 3 mph
S
|
|
Thursday Night
Jul 16
|
Chance Showers And Thunderstorms then Mostly Clear
|
72°F |
3 mph
S
|
|
Friday
Jul 17
|
Showers And Thunderstorms Likely
|
89°F |
6 mph
SW
|
|
Friday Night
Jul 17
|
Showers And Thunderstorms Likely
|
72°F |
6 mph
SW
|
|
Saturday
Jul 18
|
Sunny then Slight Chance Showers And Thunderstorms
|
91°F |
6 to 10 mph
WSW
|
|
Saturday Night
Jul 18
|
Slight Chance Showers And Thunderstorms
|
71°F |
8 mph
W
|
|
Sunday
Jul 19
|
Sunny
|
89°F |
7 mph
NW
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
70°F |
7 mph
SSW
|
|
Monday
Jul 20
|
Chance Showers And Thunderstorms
|
90°F |
6 to 12 mph
SW
|
|
Monday Night
Jul 20
|
Chance Rain Showers
|
69°F |
9 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Washington.
