Fountain Gap, IL Weather Forecast
Local 7-day forecast
Isolated Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Fountain Gap, IL in one place.
Isolated showers and thunderstorms. Partly sunny, with a high near 95. Heat index values as high as 106. South wind 1 to 5 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Fountain Gap, 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 5:16 PM CDT.
The active forecast window currently covers Sep 16 to Sep 21, 2026 for Fountain Gap, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 16 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 5:16 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Fountain Gap
Thursday looks like the warmest upcoming period in Fountain Gap at 98 degrees F.
Monday Night is the coolest period ahead with temperatures near 62 degrees F.
The strongest winds are forecast for Saturday at about 5 to 8 mph SW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 5:16 PM CDT
- Coverage
- 6 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
Isolated showers and thunderstorms before 8pm. Mostly clear, with a low around 75. Heat index values as high as 103. South wind around 3 mph. Chance of precipitation is 20%.
Sunny, with a high near 98. West wind around 5 mph.
Partly cloudy, with a low around 73.
Sunny, with a high near 97.
Partly cloudy, with a low around 72.
Mostly sunny, with a high near 98.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 93. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.
A chance of rain showers before 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 16
|
Isolated Showers And Thunderstorms
|
95°F |
1 to 5 mph
S
|
|
Wednesday Night
Sep 16
|
Isolated Showers And Thunderstorms then Mostly Clear
|
75°F |
3 mph
S
|
|
Thursday
Sep 17
|
Sunny
|
98°F |
5 mph
W
|
|
Thursday Night
Sep 17
|
Partly Cloudy
|
73°F |
1 mph
W
|
|
Friday
Sep 18
|
Sunny
|
97°F |
3 mph
S
|
|
Friday Night
Sep 18
|
Partly Cloudy
|
72°F |
5 mph
S
|
|
Saturday
Sep 19
|
Mostly Sunny
|
98°F |
5 to 8 mph
SW
|
|
Saturday Night
Sep 19
|
Partly Cloudy then Slight Chance Rain Showers
|
71°F |
5 mph
SW
|
|
Sunday
Sep 20
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
93°F |
3 to 8 mph
W
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
67°F |
3 to 7 mph
NW
|
|
Monday
Sep 21
|
Chance Showers And Thunderstorms
|
84°F |
3 to 7 mph
NW
|
|
Monday Night
Sep 21
|
Chance Rain Showers
|
62°F |
3 to 7 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fountain Gap.