Weather forecast for todayGlen Carbon, IL

Weather forecast for today

Current condition 7:28 am CDT

  • 46°F
  • Feels like:
    46°F
Sunny
Sunny
  • Precipitation: 0"
  • Wind: 0mphWNW 290°
  • Humidity: 88%
  • Dewpoint: 45°F
  • Pressure: 30.29"Hg
  • Visibility: 7mi
  • UV index: 0
  • ▼
In Glen Carbon, at the moment, the sun is shining brightly, creating a warm atmosphere.
The temperature is a chilly 46.4°F. The current temperature is near the lowest anticipated 44.6°F for today.

Wednesday Oct 21, 2026

  • 75°F
  • 45°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 2mphSSW 200°
  • Humidity: 55%
  • UV index: 4
  • Sunrise: 7:15 am CDT
  • Sunset: 6:13 pm CDT
  • ▼
On Wednesday, in Glen Carbon, sunny skies and pleasant visibility are expected.
Dramatic temperature shifts from a high of a moderately hot 75.2°F to a low of a brisk 44.6°F are predicted.
This October day will feature warmer weather, consistent with September's average of 79°F.
Sunrise was at 7:15 am and sunset will be at 6:13 pm; the daylight will last for 10h and 58min.

Hourly overview

Hourly temperatures

Warmest period: 2 pm - 4 pm 73°C.
Coldest hour: 8 am 48°C.

Chance of precipitation

Highest chance: 2%.

Hourly weather forecast

  • 8 am
  • 48°F
  • Feels like:
    48°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 0mphESE 107°
  • Humidity: 89%
  • Pressure: 30.27"Hg
  • Visibility: 7mi
  • UV index: 0
  • ▼
  • 9 am
  • 54°F
  • Feels like:
    54°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 1mphESE 112°
  • Humidity: 82%
  • Pressure: 30.27"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 10 am
  • 61°F
  • Feels like:
    61°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 1mphSE 129°
  • Humidity: 66%
  • Pressure: 30.27"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 11 am
  • 64°F
  • Feels like:
    64°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphS 172°
  • Humidity: 56%
  • Pressure: 30.27"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 12 pm
  • 68°F
  • Feels like:
    68°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphSSW 196°
  • Humidity: 47%
  • Pressure: 30.24"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 1 pm
  • 72°F
  • Feels like:
    72°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphSW 224°
  • Humidity: 40%
  • Pressure: 30.24"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 2 pm
  • 73°F
  • Feels like:
    73°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphSW 222°
  • Humidity: 37%
  • Pressure: 30.21"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 3 pm
  • 73°F
  • Feels like:
    73°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphWSW 243°
  • Humidity: 35%
  • Pressure: 30.18"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 4 pm
  • 73°F
  • Feels like:
    73°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphW 259°
  • Humidity: 35%
  • Pressure: 30.18"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 5 pm
  • 72°F
  • Feels like:
    72°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphWSW 243°
  • Humidity: 38%
  • Pressure: 30.18"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 pm
  • 70°F
  • Feels like:
    70°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 1mphSW 225°
  • Humidity: 45%
  • Pressure: 30.18"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:13 pm
  • 7 pm
  • 63°F
  • Feels like:
    63°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 0mphNW 321°
  • Humidity: 62%
  • Pressure: 30.18"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 8 pm
  • 59°F
  • Feels like:
    59°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 0mphNNW 340°
  • Humidity: 71%
  • Pressure: 30.18"Hg
  • Visibility: 9mi
  • UV index: 0
  • ▼
  • 9 pm
  • 57°F
  • Feels like:
    57°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 0mphNE 34°
  • Humidity: 77%
  • Pressure: 30.21"Hg
  • Visibility: 9mi
  • UV index: 0
  • ▼
  • 10 pm
  • 55°F
  • Feels like:
    55°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 0mphNNW 337°
  • Humidity: 80%
  • Pressure: 30.21"Hg
  • Visibility: 9mi
  • UV index: 0
  • ▼
  • 11 pm
  • 54°F
  • Feels like:
    54°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 0mphNW 324°
  • Humidity: 83%
  • Pressure: 30.21"Hg
  • Visibility: 9mi
  • UV index: 0
  • ▼
Today, sunshine is expected.
The temperature will be between a minimum of 48.2°F and a maximum of 73.4°F. The warmest part of the day will be from 2 pm to 4 pm.
The forecasted maximum is more similar to September's typical high of 79°F than the average for October. The lowest temperature is expected to be slightly cooler than the average minimum in October, typically 48.9°F.
Updated: Oct 21, 2026 @ 12:28:38 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

The current temperature (7:28 am CDT) is 46.4°F.

On Wednesday, the forecast calls for abundant sunshine.

Today, the highest temperature in Glen Carbon will be 75.2°F, while the lowest temperature will be 44.6°F.
The maximum temperature will be uncommonly higher than the average highest temperature of 66°F in October. The lowest temperature will be a couple of degrees lower than the average low of 48.9°F.

On Wednesday, in Glen Carbon, sunrise was at 7:15 am and sunset will be at 6:13 pm (CDT).

In Glen Carbon, Illinois, today, there will be 10h and 58min of daylight.