Cortland, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 59°F 15°C Wind Chill: 59°F	Observed at: Cortland, IL	Elevation: 990 ft | 302 m
	Last Updated: July 29, 5:15 AM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 59°F | 15°C
	Pressure: 28.99 in | 981.7 mb	Dewpoint: 54°F | 12°C
	Humidity: 82%	Wind: NNW 5 mph | NNW 8 kph
	Feels Like: 58°F | 14°C	Visibility: 34.5 mi | 55.4 km
	Lat/Long: 41.92 | -88.6886	Sunrise: 5:45 AM   Sunset: 8:16 PM

7 Day Graphical Forecast

Valid: 5:20 AM 7/29/2026

Tonight Clear 59 °F 1% Chance Precipitation Thursday Overcast 87 |62 °F 1% Chance Precipitation Friday Heavy Showers 69 |63 °F 77% Chance Precipitation Saturday Drizzle 74 |61 °F 76% Chance Precipitation Sunday Overcast 78 |59 °F 12% Chance Precipitation Monday Clear 78 |55 °F 7% Chance Precipitation Tuesday Clear 79 |61 °F 10% Chance Precipitation

7 Hour Graphical Forecast

Valid: 5:20 AM 7/29/2026

5 AM Clear 60 °F 0% Chance Precipitation

6 AM Clear 59 °F 0% Chance Precipitation

7 AM Clear 62 °F 0% Chance Precipitation

8 AM Clear 67 °F 0% Chance Precipitation

9 AM Clear 71 °F 0% Chance Precipitation

10 AM Clear 74 °F 0% Chance Precipitation

11 AM Clear 76 °F 0% Chance Precipitation

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

7 Day & Night Weather Forecast for Cortland, IL - (Fahrenheit & Celsius) Valid: 5:20 AM 7/29/2026 Tonight Clear with a low around 59°F [15°C]. NE wind to around 8 mph [13 kph], with gusts to near 16 mph [25 kph]. Chance of precipitation 1% with QPF of 0.00 in [0.0 mm]. Thursday Overcast with a high near 87°F [30°C]. SSW wind to around 6 mph [10 kph], with gusts to near 12 mph [19 kph]. Dewpoint near 54°F [12°C] with humidity of 68%. Pressure around 28.99 in [981.7 mb]. UV Index: 6.75. Chance of precipitation 1% with QPF of 0.00 in [0.0 mm]. Thursday Night Overcast with a low around 62°F [17°C]. SSW wind to around 6 mph [10 kph], with gusts to near 12 mph [19 kph]. Chance of precipitation 1% with QPF of 0.00 in [0.0 mm]. Friday Heavy Showers with a high near 69°F [20°C]. SE wind to around 13 mph [20 kph], with gusts to near 22 mph [36 kph]. Dewpoint near 54°F [12°C] with humidity of 98%. Pressure around 28.99 in [981.7 mb]. UV Index: 0.9. Chance of precipitation 77% with QPF of 0.95 in [24.0 mm]. Friday Night Heavy Showers with a low around 63°F [17°C]. SE wind to around 13 mph [20 kph], with gusts to near 22 mph [36 kph]. Chance of precipitation 77% with QPF of 0.95 in [24.0 mm]. Saturday Drizzle with a high near 74°F [23°C]. NE wind to around 13 mph [20 kph], with gusts to near 21 mph [33 kph]. Dewpoint near 54°F [12°C] with humidity of 98%. Pressure around 28.99 in [981.7 mb]. UV Index: 7.05. Chance of precipitation 76% with QPF of 0.09 in [2.4 mm]. Saturday Night Drizzle with a low around 61°F [16°C]. NE wind to around 13 mph [20 kph], with gusts to near 21 mph [33 kph]. Chance of precipitation 76% with QPF of 0.09 in [2.4 mm]. Sunday Overcast with a high near 78°F [26°C]. NNE wind to around 9 mph [14 kph], with gusts to near 14 mph [22 kph]. Dewpoint near 54°F [12°C] with humidity of 94%. Pressure around 28.99 in [981.7 mb]. UV Index: 6.35. Chance of precipitation 12% with QPF of 0.00 in [0.0 mm]. Sunday Night Overcast with a low around 59°F [15°C]. NNE wind to around 9 mph [14 kph], with gusts to near 14 mph [22 kph]. Chance of precipitation 12% with QPF of 0.00 in [0.0 mm]. Monday Clear with a high near 78°F [25°C]. SSE wind to around 6 mph [9 kph], with gusts to near 6 mph [10 kph]. Dewpoint near 54°F [12°C] with humidity of 90%. Pressure around 28.99 in [981.7 mb]. UV Index: 7.2. Chance of precipitation 7% with QPF of 0.00 in [0.0 mm]. Monday Night Clear with a low around 55°F [13°C]. SSE wind to around 6 mph [9 kph], with gusts to near 6 mph [10 kph]. Chance of precipitation 7% with QPF of 0.00 in [0.0 mm]. Tuesday Clear with a high near 79°F [26°C]. S wind to around 8 mph [13 kph], with gusts to near 14 mph [22 kph]. Dewpoint near 54°F [12°C] with humidity of 96%. Pressure around 28.99 in [981.7 mb]. UV Index: 7.15. Chance of precipitation 10% with QPF of 0.00 in [0.0 mm]. Tuesday Night Clear with a low around 61°F [16°C]. S wind to around 8 mph [13 kph], with gusts to near 14 mph [22 kph]. Chance of precipitation 10% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Cortland, IL

Tonight: 0.0 mm | 0.00 in

Thursday: 0.0 mm | 0.00 in

Thursday Night: 0.0 mm | 0.00 in

Friday: 24.0 mm | 0.95 in

Friday Night: 24.0 mm | 0.95 in

Saturday: 2.4 mm | 0.09 in

Saturday Night: 2.4 mm | 0.09 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 Cortland, IL

Tonight: NE @ 13 kph | 8 mph

Thursday: SSW @ 10 kph | 6 mph

Thursday Night: SSW @ 10 kph | 6 mph

Friday: SE @ 20 kph | 13 mph

Friday Night: SE @ 20 kph | 13 mph

Saturday: NE @ 20 kph | 13 mph

Saturday Night: NE @ 20 kph | 13 mph

Sunday: NNE @ 14 kph | 9 mph

Sunday Night: NNE @ 14 kph | 9 mph

Monday: SSE @ 9 kph | 6 mph

Monday Night: SSE @ 9 kph | 6 mph

Tuesday: S @ 13 kph | 8 mph

Tuesday Night: S @ 13 kph | 8 mph

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

Tonight: 86 %

Thursday: 68 %

Thursday Night: 68 %

Friday: 98 %

Friday Night: 98 %

Saturday: 98 %

Saturday Night: 98 %

Sunday: 94 %

Sunday Night: 94 %

Monday: 90 %

Monday Night: 90 %

Tuesday: 96 %

Tuesday Night: 96 %

7 Day and Night - Snowfall Totals Forecast for Cortland, 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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