Alta, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Partly Cloudy 73°F 23°C Heat Index: 73°F	Observed at: Alta, IL	Elevation: 845 ft | 258 m
	Last Updated: July 25, 9:30 PM Timezone: GMT -5/-4
	Sky Conditions: Partly Cloudy	Temperature: 73°F | 23°C
	Pressure: 29.13 in | 986.3 mb	Dewpoint: 70°F | 21°C
	Humidity: 90%	Wind: S 5 mph | S 8 kph
	Feels Like: 78°F | 26°C	Visibility: 27.7 mi | 44.6 km
	Lat/Long: 40.8108 | -89.6342	Sunrise: 5:48 AM   Sunset: 8:21 PM

7 Day Graphical Forecast

Valid: 11:41 AM 7/28/2026

Tonight Foggy 65 °F 17% Chance Precipitation Sunday Light Drizzle 95 |71 °F 13% Chance Precipitation Monday Light Drizzle 94 |71 °F 10% Chance Precipitation Tuesday Overcast 88 |73 °F 10% Chance Precipitation Wednesday Clear 85 |65 °F 2% Chance Precipitation Thursday Overcast 82 |66 °F 9% Chance Precipitation Friday Light Drizzle 85 |64 °F 23% Chance Precipitation

7 Hour Graphical Forecast

Valid: 11:41 AM 7/28/2026

11 AM Overcast 83 °F 1% Chance Precipitation

12 PM Overcast 86 °F 1% Chance Precipitation

1 PM Overcast 88 °F 1% Chance Precipitation

2 PM Overcast 87 °F 2% Chance Precipitation

3 PM Overcast 85 °F 2% Chance Precipitation

4 PM Overcast 85 °F 2% Chance Precipitation

5 PM Overcast 82 °F 2% Chance Precipitation

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

7 Day & Night Weather Forecast for Alta, IL - (Fahrenheit & Celsius) Valid: 11:41 AM 7/28/2026 Tonight Foggy with a low around 65°F [19°C]. S wind to around 8 mph [13 kph], with gusts to near 19 mph [30 kph]. Chance of precipitation 17% with QPF of 0.00 in [0.0 mm]. Sunday Light Drizzle with a high near 95°F [35°C]. SW wind to around 10 mph [16 kph], with gusts to near 18 mph [28 kph]. Dewpoint near 70°F [21°C] with humidity of 95%. Pressure around 29.13 in [986.3 mb]. UV Index: 7.45. Chance of precipitation 13% with QPF of 0.02 in [0.4 mm]. Sunday Night Light Drizzle with a low around 71°F [21°C]. SW wind to around 10 mph [16 kph], with gusts to near 18 mph [28 kph]. Chance of precipitation 13% with QPF of 0.02 in [0.4 mm]. Monday Light Drizzle with a high near 94°F [34°C]. SE wind to around 16 mph [25 kph], with gusts to near 28 mph [45 kph]. Dewpoint near 70°F [21°C] with humidity of 93%. Pressure around 29.13 in [986.3 mb]. UV Index: 7.6. Chance of precipitation 10% with QPF of 0.02 in [0.4 mm]. Monday Night Light Drizzle with a low around 71°F [21°C]. SE wind to around 16 mph [25 kph], with gusts to near 28 mph [45 kph]. Chance of precipitation 10% with QPF of 0.02 in [0.4 mm]. Tuesday Overcast with a high near 88°F [31°C]. N wind to around 12 mph [19 kph], with gusts to near 20 mph [32 kph]. Dewpoint near 70°F [21°C] with humidity of 94%. Pressure around 29.13 in [986.3 mb]. UV Index: 7.1. Chance of precipitation 10% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 73°F [23°C]. N wind to around 12 mph [19 kph], with gusts to near 20 mph [32 kph]. Chance of precipitation 10% with QPF of 0.00 in [0.0 mm]. Wednesday Clear with a high near 85°F [30°C]. NE wind to around 8 mph [13 kph], with gusts to near 11 mph [18 kph]. Dewpoint near 70°F [21°C] with humidity of 94%. Pressure around 29.13 in [986.3 mb]. UV Index: 7.5. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Wednesday Night Clear with a low around 65°F [18°C]. NE wind to around 8 mph [13 kph], with gusts to near 11 mph [18 kph]. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Thursday Overcast with a high near 82°F [28°C]. SE wind to around 7 mph [11 kph], with gusts to near 11 mph [18 kph]. Dewpoint near 70°F [21°C] with humidity of 94%. Pressure around 29.13 in [986.3 mb]. UV Index: 5.55. Chance of precipitation 9% with QPF of 0.00 in [0.0 mm]. Thursday Night Overcast with a low around 66°F [19°C]. SE wind to around 7 mph [11 kph], with gusts to near 11 mph [18 kph]. Chance of precipitation 9% with QPF of 0.00 in [0.0 mm]. Friday Light Drizzle with a high near 85°F [29°C]. ESE wind to around 9 mph [14 kph], with gusts to near 11 mph [18 kph]. Dewpoint near 70°F [21°C] with humidity of 88%. Pressure around 29.13 in [986.3 mb]. UV Index: 7.55. Chance of precipitation 23% with QPF of 0.01 in [0.3 mm]. Friday Night Light Drizzle with a low around 64°F [18°C]. ESE wind to around 9 mph [14 kph], with gusts to near 11 mph [18 kph]. Chance of precipitation 23% with QPF of 0.01 in [0.3 mm].

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7 Day and Night - QPF Forecast for Alta, IL

Tonight: 0.0 mm | 0.00 in

Sunday: 0.4 mm | 0.02 in

Sunday Night: 0.4 mm | 0.02 in

Monday: 0.4 mm | 0.02 in

Monday Night: 0.4 mm | 0.02 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: 0.0 mm | 0.00 in

Thursday Night: 0.0 mm | 0.00 in

Friday: 0.3 mm | 0.01 in

Friday Night: 0.3 mm | 0.01 in

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

Tonight: S @ 13 kph | 8 mph

Sunday: SW @ 16 kph | 10 mph

Sunday Night: SW @ 16 kph | 10 mph

Monday: SE @ 25 kph | 16 mph

Monday Night: SE @ 25 kph | 16 mph

Tuesday: N @ 19 kph | 12 mph

Tuesday Night: N @ 19 kph | 12 mph

Wednesday: NE @ 13 kph | 8 mph

Wednesday Night: NE @ 13 kph | 8 mph

Thursday: SE @ 11 kph | 7 mph

Thursday Night: SE @ 11 kph | 7 mph

Friday: ESE @ 14 kph | 9 mph

Friday Night: ESE @ 14 kph | 9 mph

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

Tonight: 100 %

Sunday: 95 %

Sunday Night: 95 %

Monday: 93 %

Monday Night: 93 %

Tuesday: 94 %

Tuesday Night: 94 %

Wednesday: 94 %

Wednesday Night: 94 %

Thursday: 94 %

Thursday Night: 94 %

Friday: 88 %

Friday Night: 88 %

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

Tonight: 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

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

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