Marengo, IL Weather Forecast
Local 7-day forecast
Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Marengo, IL in one place.
Partly sunny, with a high near 81. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Local Weather Overview
This forecast page for Marengo, 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: Aug 27, 2026 10:35 PM CDT.
The active forecast window currently covers Aug 29 to Sep 3, 2026 for Marengo, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 29 to Sep 3, 2026
- Latest sync
- Aug 27, 2026 10:35 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Marengo
Monday looks like the warmest upcoming period in Marengo at 88 degrees F.
Saturday Night is the coolest period ahead with temperatures near 67 degrees F.
The strongest winds are forecast for Sunday at about 15 mph S.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 27, 2026 10:35 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KMKX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of rain showers between 7pm and 10pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 67. South wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 86. Chance of precipitation is 30%.
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71.
A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 88.
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 72.
A chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87.
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70.
A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 87.
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70.
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Aug 29
|
Partly Sunny
|
81°F |
5 to 10 mph
SSW
|
|
Saturday Night
Aug 29
|
Chance Showers And Thunderstorms
|
67°F |
10 mph
S
|
|
Sunday
Aug 30
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
86°F |
15 mph
S
|
|
Sunday Night
Aug 30
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
71°F |
10 to 15 mph
S
|
|
Monday
Aug 31
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
88°F |
10 mph
SW
|
|
Monday Night
Aug 31
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
72°F |
5 to 10 mph
SSW
|
|
Tuesday
Sep 1
|
Chance Showers And Thunderstorms
|
87°F |
5 to 10 mph
SW
|
|
Tuesday Night
Sep 1
|
Partly Cloudy then Chance Showers And Thunderstorms
|
70°F |
0 to 5 mph
SW
|
|
Wednesday
Sep 2
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
87°F |
0 to 5 mph
SW
|
|
Wednesday Night
Sep 2
|
Partly Cloudy then Chance Showers And Thunderstorms
|
70°F |
0 to 5 mph
S
|
|
Thursday
Sep 3
|
Chance Showers And Thunderstorms
|
86°F |
0 to 5 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Marengo.
