Waterloo, IL Weather Forecast
Local 7-day forecast
Chance Rain Showers then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Waterloo, IL in one place.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 76. Southeast wind around 7 mph. Chance of precipitation is 30%.
Local Weather Overview
This forecast page for Waterloo, 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 9, 2026 4:33 PM CDT.
The active forecast window currently covers Apr 11 to Apr 15, 2026 for Waterloo, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 11 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 4:33 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Waterloo
Tuesday looks like the warmest upcoming period in Waterloo at 84 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Sunday at about 9 to 16 mph S.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 4:33 PM CDT
- Coverage
- 5 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 before 7pm. Partly cloudy, with a low around 59. Chance of precipitation is 30%.
A slight chance of rain showers after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 20%.
A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Chance of precipitation is 50%.
A slight chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 68. Chance of precipitation is 20%.
A chance of showers and thunderstorms after 7am. Partly sunny, with a high near 84. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Chance of precipitation is 40%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 11
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
76°F |
7 mph
SE
|
|
Saturday Night
Apr 11
|
Chance Showers And Thunderstorms then Partly Cloudy
|
59°F |
6 to 9 mph
SE
|
|
Sunday
Apr 12
|
Mostly Cloudy then Slight Chance Rain Showers
|
79°F |
9 to 16 mph
S
|
|
Sunday Night
Apr 12
|
Chance Showers And Thunderstorms
|
64°F |
14 mph
S
|
|
Monday
Apr 13
|
Chance Showers And Thunderstorms
|
82°F |
12 to 15 mph
SW
|
|
Monday Night
Apr 13
|
Slight Chance Showers And Thunderstorms then Mostly Cloudy
|
68°F |
14 mph
S
|
|
Tuesday
Apr 14
|
Chance Showers And Thunderstorms
|
84°F |
12 to 15 mph
SW
|
|
Tuesday Night
Apr 14
|
Chance Showers And Thunderstorms
|
65°F |
14 mph
S
|
|
Wednesday
Apr 15
|
Chance Showers And Thunderstorms
|
81°F |
12 to 15 mph
SW
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
57°F |
7 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Waterloo.
