Marengo, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Partly Cloudy 73°F 23°C Heat Index: 73°F	Observed at: Marengo, IL	Elevation: 856 ft | 261 m
	Last Updated: July 16, 10:30 PM Timezone: GMT -5/-4
	Sky Conditions: Partly Cloudy	Temperature: 73°F | 23°C
	Pressure: 29.15 in | 987.2 mb	Dewpoint: 66°F | 19°C
	Humidity: 77%	Wind: E 6 mph | E 10 kph
	Feels Like: 77°F | 25°C	Visibility: 40 mi | 64.3 km
	Lat/Long: 42.2486 | -88.6083	Sunrise: 5:32 AM   Sunset: 8:28 PM

7 Day Graphical Forecast

Valid: 10:33 PM 7/16/2026

Tonight Heavy Rain 70 °F 17% Chance Precipitation Friday Showers 92 |70 °F 25% Chance Precipitation Saturday Heavy Drizzle 86 |68 °F 19% Chance Precipitation Sunday Overcast 81 |62 °F 5% Chance Precipitation Monday Overcast 82 |63 °F 44% Chance Precipitation Tuesday Light Showers 80 |57 °F 44% Chance Precipitation Wednesday Mostly Clear 71 |49 °F 4% Chance Precipitation

7 Hour Graphical Forecast

Valid: 10:33 PM 7/16/2026

10 PM Clear 74 °F 6% Chance Precipitation

11 PM Overcast 73 °F 5% Chance Precipitation

12 AM Overcast 72 °F 4% Chance Precipitation

1 AM Overcast 71 °F 2% Chance Precipitation

2 AM Overcast 71 °F 2% Chance Precipitation

3 AM Overcast 71 °F 2% Chance Precipitation

4 AM Clear 71 °F 1% Chance Precipitation

7 Day Textual Forecast - with QPF, Max Wind, Humidity, Snowfall & UV Index

7 Day & Night Weather Forecast for Marengo, IL - (Fahrenheit & Celsius) Valid: 10:33 PM 7/16/2026 Tonight Heavy Rain with a low around 70°F [21°C]. ENE wind to around 8 mph [13 kph], with gusts to near 18 mph [29 kph]. Chance of precipitation 17% with QPF of 0.65 in [16.6 mm]. Friday Showers with a high near 92°F [33°C]. SW wind to around 17 mph [27 kph], with gusts to near 24 mph [39 kph]. Dewpoint near 66°F [19°C] with humidity of 94%. Pressure around 29.15 in [987.2 mb]. UV Index: 7.45. Chance of precipitation 25% with QPF of 0.10 in [2.5 mm]. Friday Night Showers with a low around 70°F [21°C]. SW wind to around 17 mph [27 kph], with gusts to near 24 mph [39 kph]. Chance of precipitation 25% with QPF of 0.10 in [2.5 mm]. Saturday Heavy Drizzle with a high near 86°F [30°C]. NW wind to around 15 mph [25 kph], with gusts to near 24 mph [38 kph]. Dewpoint near 66°F [19°C] with humidity of 95%. Pressure around 29.15 in [987.2 mb]. UV Index: 7.35. Chance of precipitation 19% with QPF of 0.04 in [1.1 mm]. Saturday Night Heavy Drizzle with a low around 68°F [20°C]. NW wind to around 15 mph [25 kph], with gusts to near 24 mph [38 kph]. Chance of precipitation 19% with QPF of 0.04 in [1.1 mm]. Sunday Overcast with a high near 81°F [27°C]. ENE wind to around 9 mph [14 kph], with gusts to near 17 mph [27 kph]. Dewpoint near 66°F [19°C] with humidity of 96%. Pressure around 29.15 in [987.2 mb]. UV Index: 7.45. Chance of precipitation 5% with QPF of 0.00 in [0.0 mm]. Sunday Night Overcast with a low around 62°F [17°C]. ENE wind to around 9 mph [14 kph], with gusts to near 17 mph [27 kph]. Chance of precipitation 5% with QPF of 0.00 in [0.0 mm]. Monday Overcast with a high near 82°F [28°C]. SSW wind to around 15 mph [24 kph], with gusts to near 36 mph [57 kph]. Dewpoint near 66°F [19°C] with humidity of 97%. Pressure around 29.15 in [987.2 mb]. UV Index: 6.65. Chance of precipitation 44% with QPF of 0.00 in [0.0 mm]. Monday Night Overcast with a low around 63°F [17°C]. SSW wind to around 15 mph [24 kph], with gusts to near 36 mph [57 kph]. Chance of precipitation 44% with QPF of 0.00 in [0.0 mm]. Tuesday Light Showers with a high near 80°F [27°C]. NW wind to around 18 mph [28 kph], with gusts to near 37 mph [59 kph]. Dewpoint near 66°F [19°C] with humidity of 96%. Pressure around 29.15 in [987.2 mb]. UV Index: 5.3. Chance of precipitation 44% with QPF of 0.19 in [4.7 mm]. Tuesday Night Light Showers with a low around 57°F [14°C]. NW wind to around 18 mph [28 kph], with gusts to near 37 mph [59 kph]. Chance of precipitation 44% with QPF of 0.19 in [4.7 mm]. Wednesday Mostly Clear with a high near 71°F [22°C]. N wind to around 14 mph [23 kph], with gusts to near 31 mph [50 kph]. Dewpoint near 66°F [19°C] with humidity of 85%. Pressure around 29.15 in [987.2 mb]. UV Index: 7.3. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm]. Wednesday Night Mostly Clear with a low around 49°F [9°C]. N wind to around 14 mph [23 kph], with gusts to near 31 mph [50 kph]. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Marengo, IL

Tonight: 16.6 mm | 0.65 in

Friday: 2.5 mm | 0.10 in

Friday Night: 2.5 mm | 0.10 in

Saturday: 1.1 mm | 0.04 in

Saturday Night: 1.1 mm | 0.04 in

Sunday: 0.0 mm | 0.00 in

Sunday Night: 0.0 mm | 0.00 in

Monday: 0.0 mm | 0.00 in

Monday Night: 0.0 mm | 0.00 in

Tuesday: 4.7 mm | 0.19 in

Tuesday Night: 4.7 mm | 0.19 in

Wednesday: 0.0 mm | 0.00 in

Wednesday Night: 0.0 mm | 0.00 in

7 Day and Night - Maximum Wind Speed Forecast for Marengo, IL

Tonight: ENE @ 13 kph | 8 mph

Friday: SW @ 27 kph | 17 mph

Friday Night: SW @ 27 kph | 17 mph

Saturday: NW @ 25 kph | 15 mph

Saturday Night: NW @ 25 kph | 15 mph

Sunday: ENE @ 14 kph | 9 mph

Sunday Night: ENE @ 14 kph | 9 mph

Monday: SSW @ 24 kph | 15 mph

Monday Night: SSW @ 24 kph | 15 mph

Tuesday: NW @ 28 kph | 18 mph

Tuesday Night: NW @ 28 kph | 18 mph

Wednesday: N @ 23 kph | 14 mph

Wednesday Night: N @ 23 kph | 14 mph

7 Day and Night - Maximum Humidity Forecast for Marengo, IL

Tonight: 84 %

Friday: 94 %

Friday Night: 94 %

Saturday: 95 %

Saturday Night: 95 %

Sunday: 96 %

Sunday Night: 96 %

Monday: 97 %

Monday Night: 97 %

Tuesday: 96 %

Tuesday Night: 96 %

Wednesday: 85 %

Wednesday Night: 85 %

7 Day and Night - Snowfall Totals Forecast for Marengo, IL

Tonight: 0.0 cm | 0.00 in

Friday: 0.0 cm | 0.00 in

Friday Night: 0.0 cm | 0.00 in

Saturday: 0.0 cm | 0.00 in

Saturday Night: 0.0 cm | 0.00 in

Sunday: 0.0 cm | 0.00 in

Sunday Night: 0.0 cm | 0.00 in

Monday: 0.0 cm | 0.00 in

Monday Night: 0.0 cm | 0.00 in

Tuesday: 0.0 cm | 0.00 in

Tuesday Night: 0.0 cm | 0.00 in

Wednesday: 0.0 cm | 0.00 in

Wednesday Night: 0.0 cm | 0.00 in

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