Pontoon Beach, IL Weather Forecast
Local 7-day forecast
Isolated Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Pontoon Beach, IL in one place.
Isolated showers and thunderstorms. Mostly cloudy, with a low around 70. Southwest wind around 9 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Pontoon Beach, 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 6:27 AM CDT.
The active forecast window currently covers Apr 15 to Apr 21, 2026 for Pontoon Beach, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 15 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 6:27 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Pontoon Beach
Friday looks like the warmest upcoming period in Pontoon Beach at 88 degrees F.
Saturday Night is the coolest period ahead with temperatures near 41 degrees F.
The strongest winds are forecast for Saturday at about 12 to 15 mph W.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 6:27 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 high near 83. Southwest wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
Scattered showers and thunderstorms before 9pm, then showers and thunderstorms. Mostly cloudy, with a low around 64. Southwest wind 8 to 12 mph. Chance of precipitation is 90%.
Scattered rain showers between 7am and 1pm, then scattered showers and thunderstorms. Mostly sunny, with a high near 84. Southwest wind 7 to 10 mph. Chance of precipitation is 40%.
Scattered showers and thunderstorms before 7pm. Mostly clear, with a low around 61. Southwest wind around 6 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 1am, then showers and thunderstorms. Mostly cloudy, with a low around 55. Chance of precipitation is 80%.
Showers and thunderstorms. Partly sunny, with a high near 68. Chance of precipitation is 80%.
A chance of rain showers before 1am. Partly cloudy, with a low around 41. Chance of precipitation is 40%.
Sunny, with a high near 64.
Clear, with a low around 42.
Sunny, with a high near 72.
Mostly clear, with a low around 51.
Mostly sunny, with a high near 78.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Apr 15
|
Isolated Showers And Thunderstorms
|
70°F |
9 mph
SW
|
|
Wednesday
Apr 15
|
Chance Showers And Thunderstorms
|
83°F |
8 to 14 mph
SW
|
|
Wednesday Night
Apr 15
|
Scattered Showers And Thunderstorms then Showers And Thunderstorms
|
64°F |
8 to 12 mph
SW
|
|
Thursday
Apr 16
|
Scattered Rain Showers
|
84°F |
7 to 10 mph
SW
|
|
Thursday Night
Apr 16
|
Scattered Showers And Thunderstorms then Mostly Clear
|
61°F |
6 mph
SW
|
|
Friday
Apr 17
|
Mostly Sunny then Chance Showers And Thunderstorms
|
88°F |
3 to 14 mph
S
|
|
Friday Night
Apr 17
|
Chance Showers And Thunderstorms
|
55°F |
13 mph
S
|
|
Saturday
Apr 18
|
Showers And Thunderstorms
|
68°F |
12 to 15 mph
W
|
|
Saturday Night
Apr 18
|
Chance Rain Showers
|
41°F |
8 to 14 mph
W
|
|
Sunday
Apr 19
|
Sunny
|
64°F |
8 to 13 mph
W
|
|
Sunday Night
Apr 19
|
Clear
|
42°F |
5 to 8 mph
NE
|
|
Monday
Apr 20
|
Sunny
|
72°F |
5 to 10 mph
S
|
|
Monday Night
Apr 20
|
Mostly Clear
|
51°F |
9 mph
S
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
78°F |
7 to 12 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Pontoon Beach.