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Alton, IL

82°F
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Alton

Illinois

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Alton, IL Weather
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Winter Center

Today

 Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities
2
Heat Advisory

Today's Weather

Wed, Sep 2

Mostly sunny and very hot; caution advised if outside for extended periods of time Hi: 99°

Tonight: Clear, warm and humid Lo: 74°

Current Weather

8:21 AM

82°F
RealFeel® 93°
Sunny More Details
RealFeel Shade™ 88°
Heat Index 87°
Wind NW 3 mph
Wind Gusts 7 mph
Air Quality Fair

Looking Ahead

Sweltering late-season heat and humidity expected this week; stay hydrated

Alton Weather Radar

Alton Weather Radar
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Clouds
Temperature

Hourly Weather

9 AM 83°
rain drop 0%
10 AM 87°
rain drop 0%
11 AM 91°
rain drop 0%
12 PM 94°
rain drop 0%
1 PM 96°
rain drop 0%
2 PM 97°
rain drop 7%
3 PM 99°
rain drop 7%
4 PM 98°
rain drop 7%
5 PM 96°
rain drop 7%
6 PM 95°
rain drop 7%
7 PM 92°
rain drop 5%
8 PM 89°
rain drop 0%

10-Day Weather Forecast

Today

9/2

99° 74°

Mostly sunny and very hot

Night: Clear, warm and humid
25%

Thu

9/3

99° 74°

Mostly sunny and very hot

Clear, warm and humid
5%

Fri

9/4

100° 72°

Mostly sunny and very hot

Mainly clear, warm and humid
8%

Sat

9/5

96° 71°

Partly sunny, a t-storm; hot

Mainly clear, warm and humid
55%

Sun

9/6

93° 69°

A thunderstorm possible

Mainly clear and humid
30%

Mon

9/7

91° 70°

Clouds and sun; hot and humid

Partly cloudy and humid
10%

Tue

9/8

92° 70°

High clouds and hot

Partly cloudy and humid
1%

Wed

9/9

94° 71°

Mostly sunny and hot

Mostly cloudy, late showers
9%

Thu

9/10

92° 67°

Showers around; hot and humid

Mainly clear
75%

Fri

9/11

85° 64°

Sunny and less humid

Mainly clear
1%

Sun & Moon

13 hrs 00 mins
Rise 6:30 AM
Set 7:30 PM
Waning Gibbous
Rise 10:12 PM
Set 1:46 PM

Air Quality

See More
Air Quality Fair

The air quality is generally acceptable for most individuals. However, sensitive groups may experience minor to moderate symptoms from long-term exposure.

Allergy Outlook

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

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World North America United States Illinois Alton

Weather Near Alton:

  • O'Fallon, MO
  • St. Charles, MO
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