GLEN CARBON, IL 62034 Weather Forecast & Current Conditions
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  62034 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)
 CURRENT WEATHER

ALTON, IL
Current Weather
1:55 AM CDT JUN 9, 2026
Broken Clouds
75°F
Feels Like: 75°F
Dewpoint: 72°F
Rel. Hum.: 90%
Visibility: 10 miles
Wind: S at 7 mph
Pressure: 29.97 inches
Last 72 hours

Local Area Snow Depth

Illinois Current Weather

Illinois MOS Forecast Weather


Weather Map

(Automated weather data from NWS/FAA)
  62034 WEATHER FORECAST
10-Day model forecast maps
2025 Hurricanes

GLEN CARBON, IL 62034
Weather Forecast

 Snowfall Forecast pages
Snow Depth pages
REST OF TONIGHT
Mostly cloudy with a slight chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall. Near steady temperature in the lower 70s. Southwest winds around 5 mph. Chance of rain 20 percent.
TUESDAY
Mostly cloudy with a chance of showers with a slight chance of thunderstorms in the morning, then mostly sunny with a slight chance of showers and thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the morning. Humid with highs around 90. Southwest winds 5 to 10 mph. Chance of rain 40 percent. Heat index values up to 107 in the afternoon.
TUESDAY NIGHT
Mostly clear. Humid with lows in the mid 70s. Southwest winds 5 to 10 mph. Heat index values up to 107 early in the evening.
WEDNESDAY
Sunny with highs in the lower 90s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 104.
WEDNESDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. A slight chance of thunderstorms in the evening. A slight chance of showers. Lows in the mid 70s. South winds 10 to 15 mph. Chance of rain 20 percent. Heat index values up to 103 early in the evening.
THURSDAY
Mostly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 50 percent. Heat index values up to 105.
THURSDAY NIGHT
Showers with a chance of thunderstorms in the evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 80 percent. Heat index values up to 100 early in the evening.
FRIDAY
Mostly sunny. Highs in the mid 80s.
FRIDAY NIGHT
Mostly clear. A slight chance of showers after midnight. Lows in the mid 60s. Chance of rain 20 percent.
SATURDAY
Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent.
SATURDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 50 percent.
SUNDAY
Partly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent.
SUNDAY NIGHT
A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the lower 60s. Chance of rain 40 percent.

  62034 WEATHER SATELLITE LOOPS
Visible Weather Satellite
GLEN CARBON, IL 62034
Infrared Weather Satellite
GLEN CARBON, IL 62034
  62034 WEATHER RADAR LOOP
NEXRAD Weather Radar
GLEN CARBON, IL 62034
 MOS COMPUTER WEATHER FORECAST

ALTON, IL 3 hourly weather forecast
weather forecast created  6:00 PM MDT  6/ 8/2026
Tuesday
9 JUN 2026		 GLEN CARBON, IL 62034 weather forecast Day 1, 0 hours 1 AM 74° 74° Mostly Cloudy 59%
RAIN
***		 0% Thunder
( 23% severe)		 SSW   5 90% 71°
Low 72° GLEN CARBON, IL 62034 weather forecast Day 1, 3 hours 4 AM 73° 73° Mostly Cloudy SSW   5 90% 70°
High 91° GLEN CARBON, IL 62034 weather forecast Day 1, 6 hours 7 AM 74° 74° Mostly Cloudy 20%
RAIN
.01–.1 in		 0% Thunder
( 30% severe)		 S   5 93% 72°

Mostly Cloudy

Chance of Rain

 GLEN CARBON, IL 62034 weather forecast Day 1, 9 hours 10 AM 81° 86° Mostly Cloudy SW   10 77% 73°
GLEN CARBON, IL 62034 weather forecast Day 1, 12 hours 1 PM 87° 98° Mostly Cloudy 23%
RAIN
<.01 in		 0% Thunder
( 41% severe)		 SW   10 70% 76°
GLEN CARBON, IL 62034 weather forecast Day 1, 15 hours 4 PM 90° 102° Partly Cloudy SW   12 64% 76°
GLEN CARBON, IL 62034 weather forecast Day 1, 18 hours 7 PM 89° 102° Partly Cloudy 6%

 0% Thunder
( 19% severe)		 SSW   8 68% 77°
GLEN CARBON, IL 62034 weather forecast Day 1, 21 hours 10 PM 81° 87° Partly Cloudy S   6 82% 75°
Wednesday
10 JUN 2026		 GLEN CARBON, IL 62034 weather forecast Day 2, 0 hours 1 AM 79° 82° Clear 2%

 0% Thunder
( 7% severe)		 SSW   7 79% 72°
Low 73° GLEN CARBON, IL 62034 weather forecast Day 2, 3 hours 4 AM 76° 77° Clear SSW   7 82% 70°
High 92° GLEN CARBON, IL 62034 weather forecast Day 2, 6 hours 7 AM 77° 79° Clear 0%

 0% Thunder
( 9% severe)		 SSW   8 82% 71°

Clear



 GLEN CARBON, IL 62034 weather forecast Day 2, 9 hours 10 AM 84° 90° Clear SSW   13 67% 72°
GLEN CARBON, IL 62034 weather forecast Day 2, 12 hours 1 PM 90° 99° Clear 4%

 0% Thunder
( 37% severe)		 SSW   14 58% 73°
GLEN CARBON, IL 62034 weather forecast Day 2, 15 hours 4 PM 92° 99° Partly Cloudy SSW   16 51% 71°
GLEN CARBON, IL 62034 weather forecast Day 2, 18 hours 7 PM 90° 99° Clear 15%
RAIN
<.01 in		 0% Thunder
( 26% severe)		 S   15 58% 73°
GLEN CARBON, IL 62034 weather forecast Day 2, 21 hours 10 PM 82° 86° Partly Cloudy SSW   12 67% 70°

ALTON, IL extended weather forecast
Thursday
11 JUN 2026		 Friday
12 JUN 2026		 Saturday
13 JUN 2026		 Sunday
14 JUN 2026		 Monday
15 JUN 2026
Low 72° Low 65° Low 59° Low 65° Low 62°
High 93° High 82° High 84° High 78° High 76°
GLEN CARBON, IL 62034 weather forecast Day 3 GLEN CARBON, IL 62034 weather forecast Day 4 GLEN CARBON, IL 62034 weather forecast Day 5 GLEN CARBON, IL 62034 weather forecast Day 6 GLEN CARBON, IL 62034 weather forecast Day 7
Partly Cloudy
34% Rain		 Partly Cloudy
62% Rain		 Partly Cloudy
16% Rain		 Overcast
61% Rain		 Overcast
45% Rain
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