Lewistown, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 78°F 26°C Heat Index: 78°F	Observed at: Lewistown, IL	Elevation: 791 ft | 241 m
	Last Updated: July 16, 10:30 PM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 78°F | 26°C
	Pressure: 29.37 in | 994.5 mb	Dewpoint: 73°F | 23°C
	Humidity: 83%	Wind: S 3 mph | S 5 kph
	Feels Like: 87°F | 31°C	Visibility: 32.2 mi | 51.8 km
	Lat/Long: 40.3931 | -90.1547	Sunrise: 5:44 AM   Sunset: 8:29 PM

7 Day Graphical Forecast

Valid: 10:32 PM 7/16/2026

Tonight Partly Cloudy 69 °F 6% Chance Precipitation Friday Overcast 93 |74 °F 26% Chance Precipitation Saturday Heavy Drizzle 95 |74 °F 46% Chance Precipitation Sunday Light Drizzle 85 |69 °F 11% Chance Precipitation Monday Light Showers 93 |68 °F 15% Chance Precipitation Tuesday Overcast 87 |67 °F 18% Chance Precipitation Wednesday Overcast 72 |53 °F 4% Chance Precipitation

7 Hour Graphical Forecast

Valid: 10:32 PM 7/16/2026

10 PM Clear 80 °F 2% Chance Precipitation

11 PM Clear 79 °F 2% Chance Precipitation

12 AM Clear 78 °F 2% Chance Precipitation

1 AM Overcast 77 °F 3% Chance Precipitation

2 AM Partly Cloudy 77 °F 3% Chance Precipitation

3 AM Overcast 76 °F 4% Chance Precipitation

4 AM Mostly Clear 75 °F 5% Chance Precipitation

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

7 Day & Night Weather Forecast for Lewistown, IL - (Fahrenheit & Celsius) Valid: 10:32 PM 7/16/2026 Tonight Partly Cloudy with a low around 69°F [21°C]. SE wind to around 5 mph [8 kph], with gusts to near 8 mph [13 kph]. Chance of precipitation 6% with QPF of 0.00 in [0.0 mm]. Friday Overcast with a high near 93°F [34°C]. WSW wind to around 12 mph [19 kph], with gusts to near 16 mph [26 kph]. Dewpoint near 73°F [23°C] with humidity of 91%. Pressure around 29.37 in [994.5 mb]. UV Index: 7.7. Chance of precipitation 26% with QPF of 0.00 in [0.0 mm]. Friday Night Overcast with a low around 74°F [23°C]. WSW wind to around 12 mph [19 kph], with gusts to near 16 mph [26 kph]. Chance of precipitation 26% with QPF of 0.00 in [0.0 mm]. Saturday Heavy Drizzle with a high near 95°F [35°C]. WNW wind to around 16 mph [25 kph], with gusts to near 29 mph [46 kph]. Dewpoint near 73°F [23°C] with humidity of 94%. Pressure around 29.37 in [994.5 mb]. UV Index: 7.7. Chance of precipitation 46% with QPF of 0.08 in [2.0 mm]. Saturday Night Heavy Drizzle with a low around 74°F [23°C]. WNW wind to around 16 mph [25 kph], with gusts to near 29 mph [46 kph]. Chance of precipitation 46% with QPF of 0.08 in [2.0 mm]. Sunday Light Drizzle with a high near 85°F [30°C]. E wind to around 9 mph [15 kph], with gusts to near 17 mph [28 kph]. Dewpoint near 73°F [23°C] with humidity of 96%. Pressure around 29.37 in [994.5 mb]. UV Index: 7.75. Chance of precipitation 11% with QPF of 0.01 in [0.3 mm]. Sunday Night Light Drizzle with a low around 69°F [20°C]. E wind to around 9 mph [15 kph], with gusts to near 17 mph [28 kph]. Chance of precipitation 11% with QPF of 0.01 in [0.3 mm]. Monday Light Showers with a high near 93°F [34°C]. S wind to around 10 mph [17 kph], with gusts to near 26 mph [42 kph]. Dewpoint near 73°F [23°C] with humidity of 95%. Pressure around 29.37 in [994.5 mb]. UV Index: 7.7. Chance of precipitation 15% with QPF of 0.33 in [8.3 mm]. Monday Night Light Showers with a low around 68°F [20°C]. S wind to around 10 mph [17 kph], with gusts to near 26 mph [42 kph]. Chance of precipitation 15% with QPF of 0.33 in [8.3 mm]. Tuesday Overcast with a high near 87°F [31°C]. WNW wind to around 20 mph [32 kph], with gusts to near 34 mph [54 kph]. Dewpoint near 73°F [23°C] with humidity of 81%. Pressure around 29.37 in [994.5 mb]. UV Index: 6.9. Chance of precipitation 18% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 67°F [19°C]. WNW wind to around 20 mph [32 kph], with gusts to near 34 mph [54 kph]. Chance of precipitation 18% with QPF of 0.00 in [0.0 mm]. Wednesday Overcast with a high near 72°F [22°C]. NNE wind to around 13 mph [22 kph], with gusts to near 28 mph [44 kph]. Dewpoint near 73°F [23°C] with humidity of 87%. Pressure around 29.37 in [994.5 mb]. UV Index: 7.55. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm]. Wednesday Night Overcast with a low around 53°F [12°C]. NNE wind to around 13 mph [22 kph], with gusts to near 28 mph [44 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 Lewistown, IL

Tonight: 0.0 mm | 0.00 in

Friday: 0.0 mm | 0.00 in

Friday Night: 0.0 mm | 0.00 in

Saturday: 2.0 mm | 0.08 in

Saturday Night: 2.0 mm | 0.08 in

Sunday: 0.3 mm | 0.01 in

Sunday Night: 0.3 mm | 0.01 in

Monday: 8.3 mm | 0.33 in

Monday Night: 8.3 mm | 0.33 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

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

Tonight: SE @ 8 kph | 5 mph

Friday: WSW @ 19 kph | 12 mph

Friday Night: WSW @ 19 kph | 12 mph

Saturday: WNW @ 25 kph | 16 mph

Saturday Night: WNW @ 25 kph | 16 mph

Sunday: E @ 15 kph | 9 mph

Sunday Night: E @ 15 kph | 9 mph

Monday: S @ 17 kph | 10 mph

Monday Night: S @ 17 kph | 10 mph

Tuesday: WNW @ 32 kph | 20 mph

Tuesday Night: WNW @ 32 kph | 20 mph

Wednesday: NNE @ 22 kph | 13 mph

Wednesday Night: NNE @ 22 kph | 13 mph

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

Tonight: 97 %

Friday: 91 %

Friday Night: 91 %

Saturday: 94 %

Saturday Night: 94 %

Sunday: 96 %

Sunday Night: 96 %

Monday: 95 %

Monday Night: 95 %

Tuesday: 81 %

Tuesday Night: 81 %

Wednesday: 87 %

Wednesday Night: 87 %

7 Day and Night - Snowfall Totals Forecast for Lewistown, 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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