Current Weather Forecast for Glen Carbon

IL 62034  |   1:16pm

Weather Conditions

91°

Feels Like 104°

Partly Cloudy

77° 93° EXTREME HEAT

EXTREME HEAT

10

UV Index

Good

Air Quality

S 5 mph

Wind

0 in

rain

Today

Sun 7/20

93°

Highest Temperature

15%

A mix of clouds and sun. A stray shower or thunderstorm is possible. High 93F. Winds SW at 5 to 10 mph.

Tonight

Sun 7/20

74°

Lowest Temperature

42%

A few clouds with an isolated thunderstorm possible after midnight. Low 74F. Winds SSE at 5 to 10 mph. Chance of rain 40%.

Tomorrow

Mon 7/21

87°

Highest Temperature

24%

Mostly cloudy. A stray shower or thunderstorm is possible. High 87F. Winds NNE at 5 to 10 mph.

Next 12 Hours Next 7 Days

Next 12 Hours Forecast in Glen Carbon

Hourly Weather Forecast & Temperature

2PM

15%

92°

Feels Like 104°

EXTREME HEAT

Partly Cloudy

SW 7 mph

Wind

1012 mb

Pressure

58%

Humidity

8

UV Index

10mi

Visibility

53%

Cloud Cover

3PM

15%

92°

Feels Like 104°

EXTREME HEAT

Partly Cloudy

SW 8 mph

Wind

1012 mb

Pressure

56%

Humidity

7

UV Index

10mi

Visibility

48%

Cloud Cover

4PM

15%

92°

Feels Like 103°

EXTREME HEAT

Partly Cloudy

SW 9 mph

Wind

1011 mb

Pressure

57%

Humidity

5

UV Index

10mi

Visibility

54%

Cloud Cover

5PM

2%

91°

Feels Like 100°

FLOOD WATCH

2

Partly Cloudy

SW 9 mph

Wind

1010 mb

Pressure

55%

Humidity

3

UV Index

10mi

Visibility

40%

Cloud Cover

6PM

2%

90°

Feels Like 99°

FLOOD WATCH

2

Partly Cloudy

SW 6 mph

Wind

1010 mb

Pressure

57%

Humidity

1

UV Index

10mi

Visibility

53%

Cloud Cover

7PM

3%

89°

Feels Like 98°

FLOOD WATCH

2

Partly Cloudy

SW 7 mph

Wind

1010 mb

Pressure

59%

Humidity

0

UV Index

10mi

Visibility

53%

Cloud Cover

8PM

9%

87°

Feels Like 95°

FLOOD WATCH

2

Partly Cloudy

SSW 6 mph

Wind

1011 mb

Pressure

62%

Humidity

0

UV Index

10mi

Visibility

54%

Cloud Cover

9PM

6%

85°

Feels Like 92°

FLOOD WATCH

2

Partly Cloudy

SSW 6 mph

Wind

1011 mb

Pressure

67%

Humidity

0

UV Index

10mi

Visibility

32%

Cloud Cover

10PM

32%

83°

Feels Like 90°

FLOOD WATCH

2

Few Showers

SSW 5 mph

Wind

1012 mb

Pressure

75%

Humidity

0

UV Index

10mi

Visibility

49%

Cloud Cover

11PM

9%

81°

Feels Like 87°

FLOOD WATCH

2

Partly Cloudy

SSE 4 mph

Wind

1012 mb

Pressure

81%

Humidity

0

UV Index

8mi

Visibility

52%

Cloud Cover

12AM

24%

80°

Feels Like 87°

FLOOD WATCH

2

Mostly Cloudy

S 3 mph

Wind

1012 mb

Pressure

85%

Humidity

0

UV Index

8mi

Visibility

76%

Cloud Cover

1AM

24%

78°

Feels Like 83°

FLOOD WATCH

2

Partly Cloudy

NE 6 mph

Wind

1013 mb

Pressure

90%

Humidity

0

UV Index

7mi

Visibility

54%

Cloud Cover

Sun 7/20

Sun

15%

77°

93°

EXTREME HEAT

Mix of sun and clouds. Highs in the low 90s and lows in the mid 70s.

104°

Feels Like

SW 9 mph

Wind

56%

Humidity

10

UV Index

5:51 AM

Sunrise

8:21 PM

Sunset

Mon 7/21

Mon

24%

74°

87°

FLOOD WATCH

2

More clouds than sun. Highs in the upper 80s and lows in the mid 70s.

95°

Feels Like

NNE 6 mph

Wind

78%

Humidity

8

UV Index

5:52 AM

Sunrise

8:20 PM

Sunset

Tue 7/22

Tue

20%

74°

91°

EXTREME HEAT

Mix of sun and clouds. Highs in the low 90s and lows in the mid 70s.

102°

Feels Like

ESE 7 mph

Wind

75%

Humidity

9

UV Index

5:53 AM

Sunrise

8:19 PM

Sunset

Wed 7/23

Wed

18%

75°

95°

EXTREME HEAT

Plenty of sun. Highs in the mid 90s and lows in the mid 70s.

105°

Feels Like

SSE 7 mph

Wind

65%

Humidity

10

UV Index

5:53 AM

Sunrise

8:18 PM

Sunset

Thu 7/24

Thu

22%

76°

96°

EXTREME HEAT

A few clouds. Highs in the mid 90s and lows in the upper 70s.

104°

Feels Like

S 9 mph

Wind

59%

Humidity

10

UV Index

5:54 AM

Sunrise

8:18 PM

Sunset

Fri 7/25

Fri

53%

77°

92°

Showers and thunderstorms late. Highs in the low 90s and lows in the mid 70s.

101°

Feels Like

SSW 8 mph

Wind

63%

Humidity

9

UV Index

5:55 AM

Sunrise

8:17 PM

Sunset

Sat 7/26

Sat

37%

76°

93°

Thunderstorms developing in the afternoon. Highs in the low 90s and lows in the mid 70s.

102°

Feels Like

SSW 8 mph

Wind

66%

Humidity

9

UV Index

5:56 AM

Sunrise

8:16 PM

Sunset

Sun 7/27

Sun

22%

76°

94°

Partly cloudy. Highs in the mid 90s and lows in the mid 70s.

105°

Feels Like

W 6 mph

Wind

66%

Humidity

9

UV Index

5:57 AM

Sunrise

8:15 PM

Sunset

Need to see beyond 12 Hours?

Find more forecast on the FREE FOX WEATHER App

GO TO APP STORE

Latest Stories from Illinois

New York City, Boston, Indianapolis among major cities threatened by severe storms, flooding rain on Sunday

The weekend is ending on a stormy note across a large portion of the U.S., as more than 76 million Americans face the threat of severe weather on Sunday from the Northeast to the Midwest.

Detroit, Indianapolis amid over 30 million covered in Saturday severe weather threat

Forecasters are tracking a potential mesoscale convective system that could unleash damaging winds, hail and possible tornadoes across parts of Iowa, Illinois, Indiana, Wisconsin, Michigan and surrounding areas over the next 24 hours.

Weekend weather update from FOX Weather: Chicago, Detroit under Saturday severe weather threat

Top weather news for July 19, 2025. The Midwest and Great Lakes region could see severe thunderstorms over the next 24 hours, with damaging winds, hail and even a few tornadoes.

Hear It: Booming thunderclap caught on Illinois officer's body camera after lightning strike

A close call for a police officer and two other people in Round Lake, Illinois after lightning struck the base of a nearby tree during a severe thunderstorm. The shocking video was captured on the officer's body camera.

Load More Stories