Knoxville, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Overcast 78°F 26°C Heat Index: 78°F	Observed at: Knoxville, IL	Elevation: 858 ft | 262 m
	Last Updated: July 26, 11:30 PM Timezone: GMT -5/-4
	Sky Conditions: Overcast	Temperature: 78°F | 26°C
	Pressure: 29 in | 982.2 mb	Dewpoint: 76°F | 24°C
	Humidity: 93%	Wind: SE 8 mph | SE 13 kph
	Feels Like: 87°F | 31°C	Visibility: 25.1 mi | 40.4 km
	Lat/Long: 40.9083 | -90.2847	Sunrise: 5:52 AM   Sunset: 8:23 PM

7 Day Graphical Forecast

Valid: 5:45 AM 7/29/2026

Tonight Foggy 74 °F 19% Chance Precipitation Monday Foggy 102 |72 °F 20% Chance Precipitation Tuesday Overcast 86 |71 °F 2% Chance Precipitation Wednesday Overcast 82 |63 °F 4% Chance Precipitation Thursday Showers 84 |63 °F 17% Chance Precipitation Friday Heavy Showers 70 |65 °F 43% Chance Precipitation Saturday Light Drizzle 77 |63 °F 34% Chance Precipitation

7 Hour Graphical Forecast

Valid: 5:45 AM 7/29/2026

5 AM Clear 64 °F 4% Chance Precipitation

6 AM Clear 63 °F 4% Chance Precipitation

7 AM Clear 63 °F 4% Chance Precipitation

8 AM Clear 67 °F 1% Chance Precipitation

9 AM Mostly Clear 70 °F 1% Chance Precipitation

10 AM Mostly Clear 74 °F 1% Chance Precipitation

11 AM Clear 76 °F 1% Chance Precipitation

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

7 Day & Night Weather Forecast for Knoxville, IL - (Fahrenheit & Celsius) Valid: 5:45 AM 7/29/2026 Tonight Foggy with a low around 74°F [23°C]. SSW wind to around 6 mph [10 kph], with gusts to near 12 mph [19 kph]. Chance of precipitation 19% with QPF of 0.00 in [0.0 mm]. Monday Foggy with a high near 102°F [39°C]. SSW wind to around 18 mph [28 kph], with gusts to near 25 mph [41 kph]. Dewpoint near 76°F [24°C] with humidity of 97%. Pressure around 29.00 in [982.2 mb]. UV Index: 4.65. Chance of precipitation 20% with QPF of 0.00 in [0.0 mm]. Monday Night Foggy with a low around 72°F [22°C]. SSW wind to around 18 mph [28 kph], with gusts to near 25 mph [41 kph]. Chance of precipitation 20% with QPF of 0.00 in [0.0 mm]. Tuesday Overcast with a high near 86°F [30°C]. NNE wind to around 13 mph [20 kph], with gusts to near 22 mph [36 kph]. Dewpoint near 76°F [24°C] with humidity of 91%. Pressure around 29.00 in [982.2 mb]. UV Index: 7.2. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 71°F [22°C]. NNE wind to around 13 mph [20 kph], with gusts to near 22 mph [36 kph]. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Wednesday Overcast with a high near 82°F [28°C]. SE wind to around 10 mph [16 kph], with gusts to near 19 mph [30 kph]. Dewpoint near 76°F [24°C] with humidity of 91%. Pressure around 29.00 in [982.2 mb]. UV Index: 7.5. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm]. Wednesday Night Overcast with a low around 63°F [17°C]. SE wind to around 10 mph [16 kph], with gusts to near 19 mph [30 kph]. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm]. Thursday Showers with a high near 84°F [29°C]. S wind to around 12 mph [20 kph], with gusts to near 21 mph [33 kph]. Dewpoint near 76°F [24°C] with humidity of 99%. Pressure around 29.00 in [982.2 mb]. UV Index: 7.2. Chance of precipitation 17% with QPF of 0.37 in [9.3 mm]. Thursday Night Showers with a low around 63°F [17°C]. S wind to around 12 mph [20 kph], with gusts to near 21 mph [33 kph]. Chance of precipitation 17% with QPF of 0.37 in [9.3 mm]. Friday Heavy Showers with a high near 70°F [21°C]. SE wind to around 14 mph [23 kph], with gusts to near 29 mph [47 kph]. Dewpoint near 76°F [24°C] with humidity of 99%. Pressure around 29.00 in [982.2 mb]. UV Index: 0.5. Chance of precipitation 43% with QPF of 3.93 in [99.7 mm]. Friday Night Heavy Showers with a low around 65°F [18°C]. SE wind to around 14 mph [23 kph], with gusts to near 29 mph [47 kph]. Chance of precipitation 43% with QPF of 3.93 in [99.7 mm]. Saturday Light Drizzle with a high near 77°F [25°C]. NE wind to around 11 mph [17 kph], with gusts to near 23 mph [37 kph]. Dewpoint near 76°F [24°C] with humidity of 98%. Pressure around 29.00 in [982.2 mb]. UV Index: 6. Chance of precipitation 34% with QPF of 0.09 in [2.3 mm]. Saturday Night Light Drizzle with a low around 63°F [17°C]. NE wind to around 11 mph [17 kph], with gusts to near 23 mph [37 kph]. Chance of precipitation 34% with QPF of 0.09 in [2.3 mm].

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7 Day and Night - QPF Forecast for Knoxville, IL

Tonight: 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

Wednesday: 0.0 mm | 0.00 in

Wednesday Night: 0.0 mm | 0.00 in

Thursday: 9.3 mm | 0.37 in

Thursday Night: 9.3 mm | 0.37 in

Friday: 99.7 mm | 3.93 in

Friday Night: 99.7 mm | 3.93 in

Saturday: 2.3 mm | 0.09 in

Saturday Night: 2.3 mm | 0.09 in

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

Tonight: SSW @ 10 kph | 6 mph

Monday: SSW @ 28 kph | 18 mph

Monday Night: SSW @ 28 kph | 18 mph

Tuesday: NNE @ 20 kph | 13 mph

Tuesday Night: NNE @ 20 kph | 13 mph

Wednesday: SE @ 16 kph | 10 mph

Wednesday Night: SE @ 16 kph | 10 mph

Thursday: S @ 20 kph | 12 mph

Thursday Night: S @ 20 kph | 12 mph

Friday: SE @ 23 kph | 14 mph

Friday Night: SE @ 23 kph | 14 mph

Saturday: NE @ 17 kph | 11 mph

Saturday Night: NE @ 17 kph | 11 mph

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

Tonight: 100 %

Monday: 97 %

Monday Night: 97 %

Tuesday: 91 %

Tuesday Night: 91 %

Wednesday: 91 %

Wednesday Night: 91 %

Thursday: 99 %

Thursday Night: 99 %

Friday: 99 %

Friday Night: 99 %

Saturday: 98 %

Saturday Night: 98 %

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

Tonight: 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

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

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