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Alton, IL

77°F
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Alton, IL Weather
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Today

 Hourly Daily Radar MinuteCast® Monthly Air Quality Health & Activities
Air Quality Alert

Tonight's Weather

Wed, Sep 17

Mostly clear Lo: 57°

Tomorrow: Partly sunny and hot; possible danger of dehydration and heatstroke while doing strenuous activities Hi: 94°

Current Weather

8:39 PM

77°F
RealFeel® 76°
Clear More Details
Wind NNE 2 mph
Wind Gusts 2 mph
Air Quality Poor

Alton Weather Radar

Alton Weather Radar
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Clouds
Temperature

Hourly Weather

9 PM 75°
rain drop 0%
10 PM 72°
rain drop 0%
11 PM 68°
rain drop 0%
12 AM 66°
rain drop 0%
1 AM 65°
rain drop 0%
2 AM 64°
rain drop 0%
3 AM 62°
rain drop 0%
4 AM 61°
rain drop 0%
5 AM 60°
rain drop 0%
6 AM 59°
rain drop 0%
7 AM 57°
rain drop 0%
8 AM 61°
rain drop 0%

10-Day Weather Forecast

Tonight

9/17

57° Lo

Mostly clear

0%

Thu

9/18

94° 63°

Partly sunny and hot

Night: A thunderstorm in spots
1%

Fri

9/19

82° 62°

A shower and thunderstorm

Humid with a stray t-storm
88%

Sat

9/20

83° 65°

A t-storm around in the p.m.

Mainly clear and humid
55%

Sun

9/21

79° 65°

Humid; a stray p.m. t-storm

Clouds breaking; humid
55%

Mon

9/22

78° 64°

A strong afternoon t-storm

Humid with a t-storm in spots
85%

Tue

9/23

83° 61°

A thunderstorm in spots

A thunderstorm around late
55%

Wed

9/24

81° 61°

Thunderstorms in the morning

Cloudy, a couple of t-storms
67%

Thu

9/25

80° 60°

A couple of t-storms; humid

Early t-storms, then a shower
69%

Fri

9/26

81° 58°

Mostly cloudy, showers; warm

A little rain in the evening
60%

Sun & Moon

12 hrs 22 mins
Rise 6:44 AM
Set 7:06 PM
Waning Crescent
Rise 2:09 AM
Set 5:16 PM

Air Quality

See More
Air Quality Poor

The air has reached a high level of pollution and is unhealthy for sensitive groups. Reduce time spent outside if you are feeling symptoms such as difficulty breathing or throat irritation.

Allergy Outlook

See All
Tree Pollen Low Data is not supported in this location Ragweed Pollen Moderate Data is not supported in this location Mold High Data is not supported in this location Grass Pollen Low Data is not supported in this location Dust & Dander High Data is not supported in this location

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