Arnold, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Mostly Clear 78°F 26°C Heat Index: 78°F	Observed at: Arnold, IL	Elevation: 704 ft | 215 m
	Last Updated: July 16, 10:15 PM Timezone: GMT -5/-4
	Sky Conditions: Mostly Clear	Temperature: 78°F | 26°C
	Pressure: 29.33 in | 993.3 mb	Dewpoint: 72°F | 22°C
	Humidity: 82%	Wind: S 3 mph | S 5 kph
	Feels Like: 86°F | 30°C	Visibility: 35.7 mi | 57.4 km
	Lat/Long: 39.7211 | -90.145	Sunrise: 5:46 AM   Sunset: 8:27 PM

7 Day Graphical Forecast

Valid: 10:26 PM 7/16/2026

Tonight Light Drizzle 69 °F 15% Chance Precipitation Friday Overcast 91 |73 °F 23% Chance Precipitation Saturday Light Drizzle 94 |75 °F 37% Chance Precipitation Sunday Showers 84 |71 °F 25% Chance Precipitation Monday Showers 91 |69 °F 6% Chance Precipitation Tuesday Overcast 88 |67 °F 15% Chance Precipitation Wednesday Partly Cloudy 70 |53 °F 3% Chance Precipitation

7 Hour Graphical Forecast

Valid: 10:26 PM 7/16/2026

10 PM Clear 79 °F 2% Chance Precipitation

11 PM Overcast 77 °F 3% Chance Precipitation

12 AM Overcast 77 °F 4% Chance Precipitation

1 AM Overcast 76 °F 6% Chance Precipitation

2 AM Mostly Clear 75 °F 5% Chance Precipitation

3 AM Partly Cloudy 74 °F 6% Chance Precipitation

4 AM Mostly Clear 74 °F 6% Chance Precipitation

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

7 Day & Night Weather Forecast for Arnold, IL - (Fahrenheit & Celsius) Valid: 10:26 PM 7/16/2026 Tonight Light Drizzle with a low around 69°F [21°C]. SE wind to around 9 mph [15 kph], with gusts to near 11 mph [17 kph]. Chance of precipitation 15% with QPF of 0.02 in [0.4 mm]. Friday Overcast with a high near 91°F [33°C]. WSW wind to around 12 mph [20 kph], with gusts to near 19 mph [31 kph]. Dewpoint near 72°F [22°C] with humidity of 94%. Pressure around 29.33 in [993.3 mb]. UV Index: 7.55. Chance of precipitation 23% with QPF of 0.00 in [0.0 mm]. Friday Night Overcast with a low around 73°F [23°C]. WSW wind to around 12 mph [20 kph], with gusts to near 19 mph [31 kph]. Chance of precipitation 23% with QPF of 0.00 in [0.0 mm]. Saturday Light Drizzle with a high near 94°F [34°C]. W wind to around 14 mph [23 kph], with gusts to near 28 mph [44 kph]. Dewpoint near 72°F [22°C] with humidity of 91%. Pressure around 29.33 in [993.3 mb]. UV Index: 7.75. Chance of precipitation 37% with QPF of 0.04 in [1.0 mm]. Saturday Night Light Drizzle with a low around 75°F [24°C]. W wind to around 14 mph [23 kph], with gusts to near 28 mph [44 kph]. Chance of precipitation 37% with QPF of 0.04 in [1.0 mm]. Sunday Showers with a high near 84°F [29°C]. E wind to around 9 mph [15 kph], with gusts to near 21 mph [33 kph]. Dewpoint near 72°F [22°C] with humidity of 97%. Pressure around 29.33 in [993.3 mb]. UV Index: 7.75. Chance of precipitation 25% with QPF of 0.26 in [6.5 mm]. Sunday Night Showers with a low around 71°F [22°C]. E wind to around 9 mph [15 kph], with gusts to near 21 mph [33 kph]. Chance of precipitation 25% with QPF of 0.26 in [6.5 mm]. Monday Showers with a high near 91°F [33°C]. S wind to around 9 mph [14 kph], with gusts to near 20 mph [33 kph]. Dewpoint near 72°F [22°C] with humidity of 96%. Pressure around 29.33 in [993.3 mb]. UV Index: 7.8. Chance of precipitation 6% with QPF of 0.29 in [7.4 mm]. Monday Night Showers with a low around 69°F [20°C]. S wind to around 9 mph [14 kph], with gusts to near 20 mph [33 kph]. Chance of precipitation 6% with QPF of 0.29 in [7.4 mm]. Tuesday Overcast with a high near 88°F [31°C]. WNW wind to around 19 mph [30 kph], with gusts to near 37 mph [59 kph]. Dewpoint near 72°F [22°C] with humidity of 80%. Pressure around 29.33 in [993.3 mb]. UV Index: 7. Chance of precipitation 15% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 67°F [19°C]. WNW wind to around 19 mph [30 kph], with gusts to near 37 mph [59 kph]. Chance of precipitation 15% with QPF of 0.00 in [0.0 mm]. Wednesday Partly Cloudy with a high near 70°F [21°C]. NNE wind to around 13 mph [20 kph], with gusts to near 26 mph [42 kph]. Dewpoint near 72°F [22°C] with humidity of 85%. Pressure around 29.33 in [993.3 mb]. UV Index: 7.55. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Wednesday Night Partly Cloudy with a low around 53°F [12°C]. NNE wind to around 13 mph [20 kph], with gusts to near 26 mph [42 kph]. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Arnold, IL

Tonight: 0.4 mm | 0.02 in

Friday: 0.0 mm | 0.00 in

Friday Night: 0.0 mm | 0.00 in

Saturday: 1.0 mm | 0.04 in

Saturday Night: 1.0 mm | 0.04 in

Sunday: 6.5 mm | 0.26 in

Sunday Night: 6.5 mm | 0.26 in

Monday: 7.4 mm | 0.29 in

Monday Night: 7.4 mm | 0.29 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 Arnold, IL

Tonight: SE @ 15 kph | 9 mph

Friday: WSW @ 20 kph | 12 mph

Friday Night: WSW @ 20 kph | 12 mph

Saturday: W @ 23 kph | 14 mph

Saturday Night: W @ 23 kph | 14 mph

Sunday: E @ 15 kph | 9 mph

Sunday Night: E @ 15 kph | 9 mph

Monday: S @ 14 kph | 9 mph

Monday Night: S @ 14 kph | 9 mph

Tuesday: WNW @ 30 kph | 19 mph

Tuesday Night: WNW @ 30 kph | 19 mph

Wednesday: NNE @ 20 kph | 13 mph

Wednesday Night: NNE @ 20 kph | 13 mph

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

Tonight: 98 %

Friday: 94 %

Friday Night: 94 %

Saturday: 91 %

Saturday Night: 91 %

Sunday: 97 %

Sunday Night: 97 %

Monday: 96 %

Monday Night: 96 %

Tuesday: 80 %

Tuesday Night: 80 %

Wednesday: 85 %

Wednesday Night: 85 %

7 Day and Night - Snowfall Totals Forecast for Arnold, 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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