Mendon, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 69°F 21°C	Observed at: Mendon, IL	Elevation: 751 ft | 229 m
	Last Updated: July 29, 6:00 AM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 69°F | 21°C
	Pressure: 29.13 in | 986.4 mb	Dewpoint: 67°F | 19°C
	Humidity: 92%	Wind: E 8 mph | E 13 kph
	Feels Like: 72°F | 22°C	Visibility: 26.5 mi | 42.7 km
	Lat/Long: 40.0883 | -91.2836	Sunrise: 6:00 AM   Sunset: 8:22 PM

7 Day Graphical Forecast

Valid: 6:05 AM 7/29/2026

Tonight Partly Cloudy 69 °F 1% Chance Precipitation Thursday Overcast 91 |68 °F 2% Chance Precipitation Friday Showers 84 |66 °F 87% Chance Precipitation Saturday Drizzle 77 |64 °F 59% Chance Precipitation Sunday Clear 83 |61 °F 10% Chance Precipitation Monday Clear 84 |64 °F 7% Chance Precipitation Tuesday Clear 89 |62 °F 9% Chance Precipitation

7 Hour Graphical Forecast

Valid: 6:05 AM 7/29/2026

6 AM Clear 69 °F 1% Chance Precipitation

7 AM Clear 69 °F 1% Chance Precipitation

8 AM Clear 71 °F 1% Chance Precipitation

9 AM Clear 76 °F 1% Chance Precipitation

10 AM Clear 78 °F 0% Chance Precipitation

11 AM Clear 81 °F 0% Chance Precipitation

12 PM Clear 84 °F 0% Chance Precipitation

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

7 Day & Night Weather Forecast for Mendon, IL - (Fahrenheit & Celsius) Valid: 6:05 AM 7/29/2026 Tonight Partly Cloudy with a low around 69°F [21°C]. E wind to around 8 mph [12 kph], with gusts to near 17 mph [27 kph]. Chance of precipitation 1% with QPF of 0.00 in [0.0 mm]. Thursday Overcast with a high near 91°F [33°C]. SE wind to around 9 mph [14 kph], with gusts to near 17 mph [28 kph]. Dewpoint near 67°F [19°C] with humidity of 60%. Pressure around 29.13 in [986.4 mb]. UV Index: 7.6. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Thursday Night Overcast with a low around 68°F [20°C]. SE wind to around 9 mph [14 kph], with gusts to near 17 mph [28 kph]. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Friday Showers with a high near 84°F [29°C]. SE wind to around 17 mph [27 kph], with gusts to near 33 mph [54 kph]. Dewpoint near 67°F [19°C] with humidity of 99%. Pressure around 29.13 in [986.4 mb]. UV Index: 7.15. Chance of precipitation 87% with QPF of 0.91 in [23.1 mm]. Friday Night Showers with a low around 66°F [19°C]. SE wind to around 17 mph [27 kph], with gusts to near 33 mph [54 kph]. Chance of precipitation 87% with QPF of 0.91 in [23.1 mm]. Saturday Drizzle with a high near 77°F [25°C]. NNE wind to around 16 mph [25 kph], with gusts to near 26 mph [42 kph]. Dewpoint near 67°F [19°C] with humidity of 98%. Pressure around 29.13 in [986.4 mb]. UV Index: 6.45. Chance of precipitation 59% with QPF of 0.05 in [1.3 mm]. Saturday Night Drizzle with a low around 64°F [18°C]. NNE wind to around 16 mph [25 kph], with gusts to near 26 mph [42 kph]. Chance of precipitation 59% with QPF of 0.05 in [1.3 mm]. Sunday Clear with a high near 83°F [28°C]. NE wind to around 9 mph [15 kph], with gusts to near 15 mph [24 kph]. Dewpoint near 67°F [19°C] with humidity of 95%. Pressure around 29.13 in [986.4 mb]. UV Index: 7.5. Chance of precipitation 10% with QPF of 0.00 in [0.0 mm]. Sunday Night Clear with a low around 61°F [16°C]. NE wind to around 9 mph [15 kph], with gusts to near 15 mph [24 kph]. Chance of precipitation 10% with QPF of 0.00 in [0.0 mm]. Monday Clear with a high near 84°F [29°C]. ESE wind to around 9 mph [14 kph], with gusts to near 18 mph [28 kph]. Dewpoint near 67°F [19°C] with humidity of 94%. Pressure around 29.13 in [986.4 mb]. UV Index: 7.45. Chance of precipitation 7% with QPF of 0.00 in [0.0 mm]. Monday Night Clear with a low around 64°F [18°C]. ESE wind to around 9 mph [14 kph], with gusts to near 18 mph [28 kph]. Chance of precipitation 7% with QPF of 0.00 in [0.0 mm]. Tuesday Clear with a high near 89°F [32°C]. SE wind to around 13 mph [20 kph], with gusts to near 23 mph [37 kph]. Dewpoint near 67°F [19°C] with humidity of 95%. Pressure around 29.13 in [986.4 mb]. UV Index: 7.45. Chance of precipitation 9% with QPF of 0.00 in [0.0 mm]. Tuesday Night Clear with a low around 62°F [17°C]. SE wind to around 13 mph [20 kph], with gusts to near 23 mph [37 kph]. Chance of precipitation 9% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Mendon, IL

Tonight: 0.0 mm | 0.00 in

Thursday: 0.0 mm | 0.00 in

Thursday Night: 0.0 mm | 0.00 in

Friday: 23.1 mm | 0.91 in

Friday Night: 23.1 mm | 0.91 in

Saturday: 1.3 mm | 0.05 in

Saturday Night: 1.3 mm | 0.05 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: 0.0 mm | 0.00 in

Tuesday Night: 0.0 mm | 0.00 in

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

Tonight: E @ 12 kph | 8 mph

Thursday: SE @ 14 kph | 9 mph

Thursday Night: SE @ 14 kph | 9 mph

Friday: SE @ 27 kph | 17 mph

Friday Night: SE @ 27 kph | 17 mph

Saturday: NNE @ 25 kph | 16 mph

Saturday Night: NNE @ 25 kph | 16 mph

Sunday: NE @ 15 kph | 9 mph

Sunday Night: NE @ 15 kph | 9 mph

Monday: ESE @ 14 kph | 9 mph

Monday Night: ESE @ 14 kph | 9 mph

Tuesday: SE @ 20 kph | 13 mph

Tuesday Night: SE @ 20 kph | 13 mph

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

Tonight: 94 %

Thursday: 60 %

Thursday Night: 60 %

Friday: 99 %

Friday Night: 99 %

Saturday: 98 %

Saturday Night: 98 %

Sunday: 95 %

Sunday Night: 95 %

Monday: 94 %

Monday Night: 94 %

Tuesday: 95 %

Tuesday Night: 95 %

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

Tonight: 0.0 cm | 0.00 in

Thursday: 0.0 cm | 0.00 in

Thursday Night: 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

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