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City of Marengo, ILMarengo, IL 7-Day Night Weather Forecast
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Marengo, IL Weather Forecast
Marengo, IL Weather Forecast Date: 901 AM CST Thu Nov 05 2026
The area/counties/county of: Mchenry, including the cities of: Crystal Lake, Algonquin, Mchenry, and Woodstock.or toggle through each period.
Rest of Today... Cloudy. Scattered showers and areas of drizzle. Nearly steady temperatures in the upper 40s. Southwest winds around 10 mph, becoming west in the afternoon. Chance of precipitation 50%.
Tonight... Mostly cloudy. Scattered rain showers with areas of drizzle early in the evening, then patchy very light drizzle with isolated rain showers late in the evening. Lows in the mid 30s. North winds 10 to 15 mph. Chance of precipitation 50%.
Friday... Partly cloudy. Highs in the upper 40s. North winds 10 to 15 mph. Gusts up to 25 mph in the morning.
Friday Night... Partly cloudy in the evening, then clearing. Lows in the upper 20s. Northwest winds 5 to 10 mph.
Saturday... Mostly sunny. Highs around 50. Northwest winds around 5 mph.
Saturday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 30s.
Sunday... Mostly sunny. Highs in the upper 50s.
Sunday Night... Clear. Lows in the mid 30s.
Monday... Mostly sunny. Highs in the lower 60s.
Monday Night... Mostly clear. Lows in the upper 30s.
Tuesday... Mostly sunny. Highs in the lower 60s.
Tuesday Night... Partly cloudy. Lows in the upper 30s.
POP = Probability of Precipitation
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