Marengo, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Marengo, IL in one place.
A chance of showers and thunderstorms between 7am and 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers and thunderstorms likely. Mostly sunny, with a high near 89. Chance of precipitation is 60%.
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: Jul 14, 2026 9:40 PM CDT.
The active forecast window currently covers Jul 17 to Jul 21, 2026 for Marengo, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 17 to Jul 21, 2026
- Latest sync
- Jul 14, 2026 9:40 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Marengo
Saturday looks like the warmest upcoming period in Marengo at 90 degrees F.
Monday Night is the coolest period ahead with temperatures near 66 degrees F.
The strongest winds are forecast for Tuesday at about 5 to 15 mph NW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 9:40 PM CDT
- Coverage
- 5 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
Showers and thunderstorms likely before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 71.
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 90.
A slight chance of showers and thunderstorms before 1am. Mostly clear, with a low around 68.
Sunny, with a high near 87.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 67.
A slight chance of rain showers. Mostly sunny, with a high near 88.
A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 66.
A chance of rain showers before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 17
|
Chance Showers And Thunderstorms
|
89°F |
0 to 5 mph
S
|
|
Friday Night
Jul 17
|
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
|
71°F |
5 mph
SW
|
|
Saturday
Jul 18
|
Sunny then Slight Chance Showers And Thunderstorms
|
90°F |
5 to 10 mph
W
|
|
Saturday Night
Jul 18
|
Slight Chance Showers And Thunderstorms
|
68°F |
5 to 10 mph
N
|
|
Sunday
Jul 19
|
Sunny
|
87°F |
5 mph
N
|
|
Sunday Night
Jul 19
|
Partly Cloudy then Slight Chance Rain Showers
|
67°F |
5 mph
SSW
|
|
Monday
Jul 20
|
Slight Chance Rain Showers
|
88°F |
5 to 10 mph
WSW
|
|
Monday Night
Jul 20
|
Chance Showers And Thunderstorms
|
66°F |
5 to 10 mph
WNW
|
|
Tuesday
Jul 21
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
83°F |
5 to 15 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Marengo.
