What is today's weather forecast for Marengo, IL?

Today's forecast for Marengo shows a high of 46 degrees and a low of 41 degrees Fahrenheit. Patchy drizzle and fog before 10am, then a chance of drizzle after 3pm.

What is the 7-day weather forecast for Marengo, IL?

The 7-day forecast for Marengo shows highs from 41 to 56 degrees and lows from 28 to 41 degrees Fahrenheit. Expect precipitation on 2 days with chances of 20% or higher.

Will it rain in Marengo, IL this week?

Yes, rain is possible in Marengo this week. Precipitation chances: Monday (50% chance), Tuesday (50% chance).

How accurate is the Marengo weather forecast?

WeatherForYou provides highly accurate Marengo forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Marengo, IL Weather Forecast and Current Conditions

Current Conditions From Nearby Station

Switch to Metric Units

42°F
Feels Like 39°F

Humidity 98% Dew Point 42°F Wind SSE 5 MPH Gusts 6 Barometer N/A

Solar Rad 187 w/m² Visibility 1.77 mi.

Report from a MADIS/MESONET weather station 5.3 miles NNW of central Marengo
at 8:20 AM Thu, Nov 20, 2025

Point Forecast at a Glance

ThuNov 20

FriNov 21

SatNov 22

SunNov 23

MonNov 24

TueNov 25

50%

WedNov 26

7-Day Temperature Trend

Week Ahead Summary

Variable high temperatures through the week, ranging from 41°F to 56°F. Some rain possible with at least 3 days showing precipitation chances of 20% or higher.

Climate Context

This week's forecast shows temperatures running 3°F above the historical average for November. Normal highs for this period are around 47°F with lows around 29°F.

This Date in Weather History

1979 - A blizzard struck Cheyenne, WY, producing a record 19.8 inches of snow in 24 hours, and a record total of 25.6 inches in forty hours. Strong winds created huge drifts stopping all transportation.

Marengo, IL 7 Day Weather Forecast Details

Thursday Nov 20

Day: Patchy drizzle and fog before 10am, then a chance of drizzle after 3pm. Cloudy, with a high near 46. Southwest wind 5 to 10 mph.

Night: A chance of drizzle before 9pm. Cloudy, with a low around 41. Southwest wind around 5 mph becoming calm.

Friday Nov 21

Day: Mostly cloudy, with a high near 50. Calm wind becoming north around 5 mph in the morning. Winds could gust as high as 10 mph.

Night: Cloudy, then gradually becoming partly cloudy, with a low around 28. North wind around 5 mph becoming calm in the evening.

Saturday Nov 22

Day: Mostly sunny, with a high near 49. Calm wind becoming south southwest around 5 mph in the morning. Winds could gust as high as 10 mph.

Night: Mostly clear, with a low around 36.

Sunday Nov 23

Day: Sunny, with a high near 56.

Night: Partly cloudy, with a low around 33.

Monday Nov 24

Day: Partly sunny, with a high near 54.

Night: A chance of rain. Mostly cloudy, with a low around 40.

Tuesday Nov 25

Day: A chance of rain. Mostly cloudy, with a high near 52.

Night: Mostly cloudy, with a low around 33.

Wednesday Nov 26

Day: Partly sunny, with a high near 41.

About Marengo, IL

Marengo is a city in McHenry County, Illinois, United States on the Kishwaukee River. It lies approximately 60 miles west northwest of Chicago and approximately 30 miles east of Rockford. Per the 2020 census, the population was 7,568.

Content from Wikipedia, licensed under CC BY-SA 3.0.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

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