Knoxville, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 79°F 26°C Heat Index: 79°F	Observed at: Knoxville, IL	Elevation: 858 ft | 262 m
	Last Updated: July 16, 10:30 PM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 79°F | 26°C
	Pressure: 29.19 in | 988.4 mb	Dewpoint: 69°F | 21°C
	Humidity: 70%	Wind: SW 3 mph | SW 5 kph
	Feels Like: 85°F | 29°C	Visibility: 45.9 mi | 73.8 km
	Lat/Long: 40.9083 | -90.2847	Sunrise: 5:43 AM   Sunset: 8:31 PM

7 Day Graphical Forecast

Valid: 10:37 PM 7/16/2026

Tonight Overcast 72 °F 2% Chance Precipitation Friday Overcast 92 |73 °F 22% Chance Precipitation Saturday Light Drizzle 91 |73 °F 23% Chance Precipitation Sunday Overcast 82 |67 °F 10% Chance Precipitation Monday Heavy Drizzle 88 |68 °F 20% Chance Precipitation Tuesday Light Drizzle 83 |64 °F 20% Chance Precipitation Wednesday Partly Cloudy 69 |50 °F 4% Chance Precipitation

7 Hour Graphical Forecast

Valid: 10:37 PM 7/16/2026

10 PM Clear 80 °F 1% Chance Precipitation

11 PM Clear 79 °F 1% Chance Precipitation

12 AM Clear 77 °F 1% Chance Precipitation

1 AM Clear 76 °F 2% Chance Precipitation

2 AM Clear 76 °F 2% Chance Precipitation

3 AM Clear 74 °F 2% Chance Precipitation

4 AM Clear 74 °F 3% 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: 10:37 PM 7/16/2026 Tonight Overcast with a low around 72°F [22°C]. SW wind to around 6 mph [9 kph], with gusts to near 7 mph [10 kph]. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Friday Overcast with a high near 92°F [33°C]. WSW wind to around 11 mph [17 kph], with gusts to near 18 mph [29 kph]. Dewpoint near 69°F [21°C] with humidity of 93%. Pressure around 29.19 in [988.4 mb]. UV Index: 7.55. Chance of precipitation 22% with QPF of 0.00 in [0.0 mm]. Friday Night Overcast with a low around 73°F [23°C]. WSW wind to around 11 mph [17 kph], with gusts to near 18 mph [29 kph]. Chance of precipitation 22% with QPF of 0.00 in [0.0 mm]. Saturday Light Drizzle with a high near 91°F [33°C]. WNW wind to around 14 mph [23 kph], with gusts to near 29 mph [47 kph]. Dewpoint near 69°F [21°C] with humidity of 93%. Pressure around 29.19 in [988.4 mb]. UV Index: 7.65. Chance of precipitation 23% with QPF of 0.07 in [1.8 mm]. Saturday Night Light Drizzle with a low around 73°F [23°C]. WNW wind to around 14 mph [23 kph], with gusts to near 29 mph [47 kph]. Chance of precipitation 23% with QPF of 0.07 in [1.8 mm]. Sunday Overcast with a high near 82°F [28°C]. E wind to around 9 mph [14 kph], with gusts to near 16 mph [26 kph]. Dewpoint near 69°F [21°C] with humidity of 96%. Pressure around 29.19 in [988.4 mb]. UV Index: 7.7. Chance of precipitation 10% with QPF of 0.00 in [0.0 mm]. Sunday Night Overcast with a low around 67°F [19°C]. E wind to around 9 mph [14 kph], with gusts to near 16 mph [26 kph]. Chance of precipitation 10% with QPF of 0.00 in [0.0 mm]. Monday Heavy Drizzle with a high near 88°F [31°C]. S wind to around 12 mph [20 kph], with gusts to near 31 mph [50 kph]. Dewpoint near 69°F [21°C] with humidity of 95%. Pressure around 29.19 in [988.4 mb]. UV Index: 7.25. Chance of precipitation 20% with QPF of 0.14 in [3.6 mm]. Monday Night Heavy Drizzle with a low around 68°F [20°C]. S wind to around 12 mph [20 kph], with gusts to near 31 mph [50 kph]. Chance of precipitation 20% with QPF of 0.14 in [3.6 mm]. Tuesday Light Drizzle with a high near 83°F [29°C]. NW wind to around 19 mph [30 kph], with gusts to near 36 mph [57 kph]. Dewpoint near 69°F [21°C] with humidity of 83%. Pressure around 29.19 in [988.4 mb]. UV Index: 7.4. Chance of precipitation 20% with QPF of 0.00 in [0.1 mm]. Tuesday Night Light Drizzle with a low around 64°F [18°C]. NW wind to around 19 mph [30 kph], with gusts to near 36 mph [57 kph]. Chance of precipitation 20% with QPF of 0.00 in [0.1 mm]. Wednesday Partly Cloudy with a high near 69°F [21°C]. NNE wind to around 14 mph [23 kph], with gusts to near 29 mph [46 kph]. Dewpoint near 69°F [21°C] with humidity of 87%. Pressure around 29.19 in [988.4 mb]. UV Index: 7.5. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm]. Wednesday Night Partly Cloudy with a low around 50°F [10°C]. NNE wind to around 14 mph [23 kph], with gusts to near 29 mph [46 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 Knoxville, IL

Tonight: 0.0 mm | 0.00 in

Friday: 0.0 mm | 0.00 in

Friday Night: 0.0 mm | 0.00 in

Saturday: 1.8 mm | 0.07 in

Saturday Night: 1.8 mm | 0.07 in

Sunday: 0.0 mm | 0.00 in

Sunday Night: 0.0 mm | 0.00 in

Monday: 3.6 mm | 0.14 in

Monday Night: 3.6 mm | 0.14 in

Tuesday: 0.1 mm | 0.00 in

Tuesday Night: 0.1 mm | 0.00 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 Knoxville, IL

Tonight: SW @ 9 kph | 6 mph

Friday: WSW @ 17 kph | 11 mph

Friday Night: WSW @ 17 kph | 11 mph

Saturday: WNW @ 23 kph | 14 mph

Saturday Night: WNW @ 23 kph | 14 mph

Sunday: E @ 14 kph | 9 mph

Sunday Night: E @ 14 kph | 9 mph

Monday: S @ 20 kph | 12 mph

Monday Night: S @ 20 kph | 12 mph

Tuesday: NW @ 30 kph | 19 mph

Tuesday Night: NW @ 30 kph | 19 mph

Wednesday: NNE @ 23 kph | 14 mph

Wednesday Night: NNE @ 23 kph | 14 mph

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

Tonight: 98 %

Friday: 93 %

Friday Night: 93 %

Saturday: 93 %

Saturday Night: 93 %

Sunday: 96 %

Sunday Night: 96 %

Monday: 95 %

Monday Night: 95 %

Tuesday: 83 %

Tuesday Night: 83 %

Wednesday: 87 %

Wednesday Night: 87 %

7 Day and Night - Snowfall Totals Forecast for Knoxville, 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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