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Severe storms to rattle East, repeat in south-central US this week. Get the forecast

Alton, IL

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Alton, IL Weather

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11 AM

66°

RealFeel® 61°

Cool

RealFeel Guide

Cool

53° to 62°

Light jacket or sweater may be appropriate.

59%

Thunderstorms

RealFeel Shade™59°

WindWSW 13 mph

Air QualityExcellent

Max UV Index1 (Low)

Wind Gusts20 mph

Humidity81%

Indoor Humidity76% (Slightly Humid)

Dew Point60° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Rain0.02 in

Visibility5 mi

Cloud Ceiling2300 ft

12 PM

68°

RealFeel® 67°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

49%

Cloudy

RealFeel Shade™64°

WindWSW 13 mph

Air QualityExcellent

Max UV Index2 (Low)

Wind Gusts21 mph

Humidity76%

Indoor Humidity75% (Slightly Humid)

Dew Point60° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling3000 ft

1 PM

68°

RealFeel® 64°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

64%

Thunderstorms

RealFeel Shade™62°

WindW 13 mph

Air QualityFair

Max UV Index2 (Low)

Wind Gusts22 mph

Humidity75%

Indoor Humidity75% (Slightly Humid)

Dew Point60° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover95%

Rain0.05 in

Visibility5 mi

Cloud Ceiling3700 ft

2 PM

70°

RealFeel® 74°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

49%

Partly sunny

RealFeel Shade™66°

WindW 13 mph

Air QualityFair

Max UV Index8 (Very High)

Wind Gusts24 mph

Humidity69%

Indoor Humidity69% (Slightly Humid)

Dew Point60° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

3 PM

72°

RealFeel® 75°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

49%

Partly sunny

RealFeel Shade™69°

WindWSW 14 mph

Air QualityFair

Max UV Index6 (High)

Wind Gusts25 mph

Humidity63%

Indoor Humidity63% (Slightly Humid)

Dew Point59° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

4 PM

71°

RealFeel® 69°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

55%

Partly sunny w/ t-storms

RealFeel Shade™65°

WindWSW 13 mph

Air QualityFair

Max UV Index4 (Moderate)

Wind Gusts23 mph

Humidity67%

Indoor Humidity67% (Slightly Humid)

Dew Point60° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover45%

Rain0.05 in

Visibility5 mi

Cloud Ceiling30000 ft

5 PM

70°

RealFeel® 70°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

43%

Partly sunny

RealFeel Shade™67°

WindWSW 12 mph

Air QualityFair

Max UV Index3 (Moderate)

Wind Gusts21 mph

Humidity68%

Indoor Humidity68% (Slightly Humid)

Dew Point59° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

68°

RealFeel® 64°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

51%

Partly sunny w/ t-storms

RealFeel Shade™62°

WindWSW 10 mph

Air QualityFair

Max UV Index2 (Low)

Wind Gusts17 mph

Humidity74%

Indoor Humidity74% (Slightly Humid)

Dew Point60° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover45%

Rain0.05 in

Visibility5 mi

Cloud Ceiling30000 ft

7 PM

68°

RealFeel® 66°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

43%

Partly sunny

RealFeel Shade™66°

WindWSW 9 mph

Air QualityFair

Max UV Index1 (Low)

Wind Gusts14 mph

Humidity74%

Indoor Humidity74% (Slightly Humid)

Dew Point59° F

AccuLumen Brightness Index™4 (Dull)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

66°

RealFeel® 60°

Cool

RealFeel Guide

Cool

53° to 62°

Light jacket or sweater may be appropriate.

51%

Partly cloudy w/ t-storms

WindWSW 8 mph

Air QualityFair

Wind Gusts17 mph

Humidity81%

Indoor Humidity76% (Slightly Humid)

Dew Point60° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover38%

Rain0.04 in

Visibility7 mi

Cloud Ceiling30000 ft

9 PM

64°

RealFeel® 62°

Cool

RealFeel Guide

Cool

53° to 62°

Light jacket or sweater may be appropriate.

47%

Mostly clear

WindWSW 7 mph

Air QualityExcellent

Wind Gusts16 mph

Humidity86%

Indoor Humidity74% (Slightly Humid)

Dew Point60° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

61°

RealFeel® 60°

Cool

RealFeel Guide

Cool

53° to 62°

Light jacket or sweater may be appropriate.

40%

Mostly clear

WindWSW 6 mph

Air QualityExcellent

Wind Gusts15 mph

Humidity91%

Indoor Humidity71% (Slightly Humid)

Dew Point58° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover13%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

60°

RealFeel® 59°

Cool

RealFeel Guide

Cool

53° to 62°

Light jacket or sweater may be appropriate.

32%

Mostly clear

WindWSW 6 mph

Air QualityExcellent

Wind Gusts15 mph

Humidity94%

Indoor Humidity71% (Slightly Humid)

Dew Point58° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover14%

Visibility10 mi

Cloud Ceiling30000 ft

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World North America United States Illinois Alton

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