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Alton, IL

75°F
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Alton

Illinois

75°
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Alton, IL Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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Hourly

 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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10 AM

78°
RealFeel® 79°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 85%
Chevron down
Thunderstorms
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™79°

WindS 10 mph

Air QualityExcellent

Max UV Index0.9 (Low)

Wind Gusts17 mph

Humidity81%

Indoor Humidity81% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover99%

Rain0.05 in

Visibility10 mi

Cloud Ceiling2000 ft

11 AM

78°
RealFeel® 83°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 49%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™81°

Heat Index80°

WindS 10 mph

Air QualityExcellent

Max UV Index1.8 (Low)

Wind Gusts17 mph

Humidity80%

Indoor Humidity80% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling2500 ft

12 PM

79°
RealFeel® 84°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 49%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™81°

Heat Index80°

WindSSW 12 mph

Air QualityExcellent

Max UV Index2.4 (Low)

Wind Gusts18 mph

Humidity78%

Indoor Humidity78% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling3100 ft

1 PM

79°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 60%
Chevron down
Thunderstorms
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™76°

Heat Index80°

WindSSW 12 mph

Air QualityExcellent

Max UV Index1.8 (Low)

Wind Gusts18 mph

Humidity77%

Indoor Humidity77% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Rain0.25 in

Visibility3 mi

Cloud Ceiling2000 ft

2 PM

79°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 74%
Chevron down
Thunderstorms
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™76°

Heat Index80°

WindSSW 12 mph

Air QualityExcellent

Max UV Index1.7 (Low)

Wind Gusts18 mph

Humidity76%

Indoor Humidity76% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover98%

Rain0.24 in

Visibility3 mi

Cloud Ceiling2000 ft

3 PM

79°
RealFeel® 81°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 69%
Chevron down
Thunderstorms
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™79°

Heat Index83°

WindSSW 10 mph

Air QualityFair

Max UV Index1.5 (Low)

Wind Gusts17 mph

Humidity80%

Indoor Humidity80% (Extremely Humid)

Dew Point73° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover97%

Rain0.12 in

Visibility4 mi

Cloud Ceiling2000 ft

4 PM

80°
RealFeel® 84°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 49%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™82°

Heat Index83°

WindSSW 10 mph

Air QualityFair

Max UV Index1.8 (Low)

Wind Gusts16 mph

Humidity75%

Indoor Humidity75% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover96%

Visibility10 mi

Cloud Ceiling14700 ft

5 PM

79°
RealFeel® 83°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 34%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™81°

Heat Index80°

WindSW 10 mph

Air QualityFair

Max UV Index1.3 (Low)

Wind Gusts17 mph

Humidity77%

Indoor Humidity77% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover97%

Visibility10 mi

Cloud Ceiling14700 ft

6 PM

78°
RealFeel® 82°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 34%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™82°

WindSW 9 mph

Air QualityExcellent

Max UV Index0.8 (Low)

Wind Gusts15 mph

Humidity80%

Indoor Humidity80% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover98%

Visibility10 mi

Cloud Ceiling14700 ft

7 PM

77°
RealFeel® 80°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 40%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™80°

WindWSW 8 mph

Air QualityExcellent

Max UV Index0.4 (Low)

Wind Gusts14 mph

Humidity82%

Indoor Humidity82% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover98%

Visibility10 mi

Cloud Ceiling14700 ft

8 PM

76°
RealFeel® 76°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 51%
Chevron down
Thunderstorms
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

RealFeel Shade™76°

WindWSW 8 mph

Air QualityExcellent

Max UV Index0.1 (Low)

Wind Gusts12 mph

Humidity86%

Indoor Humidity86% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover96%

Rain0.04 in

Visibility6 mi

Cloud Ceiling4000 ft

9 PM

75°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 47%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

WindWSW 7 mph

Air QualityExcellent

Wind Gusts9 mph

Humidity89%

Indoor Humidity89% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling14700 ft

10 PM

73°
RealFeel® 76°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 40%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

WindWSW 7 mph

Air QualityExcellent

Wind Gusts8 mph

Humidity95%

Indoor Humidity95% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling14700 ft

11 PM

73°
RealFeel® 77°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 33%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Monday - 1:00 AM Tuesday

WindSW 6 mph

Air QualityExcellent

Wind Gusts7 mph

Humidity96%

Indoor Humidity95% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling12100 ft

Hourly Weather Forecast for Alton

AccuWeather's hourly forecast for Alton provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 78° with a RealFeel® of 79°, thunderstorms with a 85% chance of precipitation. Each hourly forecast includes wind speed, humidity, air quality, UV index, and the AccuLumen Brightness Index™, AccuWeather's measure of perceived outdoor light intensity. Forecasts are generated by proprietary systems developed by AccuWeather meteorologists since 1962.

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