Douglas, IL Weather Forecast
Local 7-day forecast
Sunny then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Douglas, IL in one place.
A slight chance of showers and thunderstorms after 4pm. Sunny, with a high near 99. Heat index values as high as 109. South wind 7 to 10 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Douglas, 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: Sep 15, 2026 8:12 AM CDT.
The active forecast window currently covers Sep 15 to Sep 21, 2026 for Douglas, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 8:12 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Douglas
Today looks like the warmest upcoming period in Douglas at 99 degrees F.
Monday Night is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Today at about 7 to 10 mph S.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 8:12 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Heat index values as high as 104. Southeast wind 2 to 7 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 8am. Partly sunny, with a high near 96. Heat index values as high as 106. Southeast wind 2 to 6 mph. Chance of precipitation is 30%.
Partly cloudy, with a low around 73. Heat index values as high as 102. South wind around 5 mph.
Sunny, with a high near 96. West wind 2 to 6 mph.
Mostly clear, with a low around 72.
Sunny, with a high near 94.
Partly cloudy, with a low around 71.
Mostly sunny, with a high near 94.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 78. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 57. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Sep 15
|
Sunny then Slight Chance Showers And Thunderstorms
|
99°F |
7 to 10 mph
S
|
|
Tonight
Sep 15
|
Chance Showers And Thunderstorms
|
72°F |
2 to 7 mph
SE
|
|
Wednesday
Sep 16
|
Chance Showers And Thunderstorms then Partly Sunny
|
96°F |
2 to 6 mph
SE
|
|
Wednesday Night
Sep 16
|
Partly Cloudy
|
73°F |
5 mph
S
|
|
Thursday
Sep 17
|
Sunny
|
96°F |
2 to 6 mph
W
|
|
Thursday Night
Sep 17
|
Mostly Clear
|
72°F |
2 mph
NE
|
|
Friday
Sep 18
|
Sunny
|
94°F |
3 mph
S
|
|
Friday Night
Sep 18
|
Partly Cloudy
|
71°F |
5 mph
SE
|
|
Saturday
Sep 19
|
Mostly Sunny
|
94°F |
5 to 10 mph
SW
|
|
Saturday Night
Sep 19
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
69°F |
6 mph
SW
|
|
Sunday
Sep 20
|
Chance Showers And Thunderstorms
|
85°F |
5 to 9 mph
W
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
62°F |
8 mph
N
|
|
Monday
Sep 21
|
Slight Chance Showers And Thunderstorms
|
78°F |
7 to 10 mph
N
|
|
Monday Night
Sep 21
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
57°F |
6 to 9 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Douglas.