Washington, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Washington, IL in one place.
Showers and thunderstorms likely after 4am. Mostly cloudy, with a low around 64. Southwest wind 12 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
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: Apr 15, 2026 3:05 AM CDT.
The active forecast window currently covers Apr 15 to Apr 21, 2026 for Washington, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 15 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 3:05 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Washington
Friday looks like the warmest upcoming period in Washington at 83 degrees F.
Saturday Night is the coolest period ahead with temperatures near 36 degrees F.
The strongest winds are forecast for Saturday at about 15 to 18 mph W.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 3:05 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
Showers and thunderstorms likely before 7am, then showers and thunderstorms likely between 7am and 4pm, then showers and thunderstorms likely. Cloudy, with a high near 76. Southwest wind 12 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and thunderstorms likely before 11pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 59. South southwest wind 12 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
A chance of rain showers. Mostly sunny, with a high near 76. West southwest wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of rain showers before 7pm. Mostly clear, with a low around 55. Southwest wind 5 to 9 mph, with gusts as high as 16 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain showers between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 83. South wind 5 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Showers and thunderstorms. Mostly cloudy, with a low around 49. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and thunderstorms. Partly sunny, with a high near 63. Chance of precipitation is 80%.
A chance of rain showers before 1am. Mostly clear, with a low around 36. Chance of precipitation is 30%.
Sunny, with a high near 54.
Mostly clear, with a low around 36.
Sunny, with a high near 65.
Mostly clear, with a low around 48.
Sunny, with a high near 72.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Apr 15
|
Showers And Thunderstorms Likely
|
64°F |
12 to 15 mph
SW
|
|
Wednesday
Apr 15
|
Showers And Thunderstorms Likely
|
76°F |
12 to 16 mph
SW
|
|
Wednesday Night
Apr 15
|
Showers And Thunderstorms Likely
|
59°F |
12 to 15 mph
SSW
|
|
Thursday
Apr 16
|
Chance Rain Showers
|
76°F |
10 to 14 mph
WSW
|
|
Thursday Night
Apr 16
|
Chance Rain Showers then Mostly Clear
|
55°F |
5 to 9 mph
SW
|
|
Friday
Apr 17
|
Mostly Sunny then Chance Showers And Thunderstorms
|
83°F |
5 to 16 mph
S
|
|
Friday Night
Apr 17
|
Showers And Thunderstorms
|
49°F |
15 mph
SSW
|
|
Saturday
Apr 18
|
Showers And Thunderstorms
|
63°F |
15 to 18 mph
W
|
|
Saturday Night
Apr 18
|
Chance Rain Showers
|
36°F |
10 to 16 mph
WNW
|
|
Sunday
Apr 19
|
Sunny
|
54°F |
10 to 16 mph
WNW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
36°F |
6 to 10 mph
WSW
|
|
Monday
Apr 20
|
Sunny
|
65°F |
7 to 12 mph
S
|
|
Monday Night
Apr 20
|
Mostly Clear
|
48°F |
12 mph
S
|
|
Tuesday
Apr 21
|
Sunny
|
72°F |
12 to 16 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Washington.
