Weather forecast for todayHarrisburg, IL

Weather forecast for today

Current condition 5:17 am CDT

  • 43°F
  • Feels like:
    43°F
Fog
Fog
  • Precipitation: 0"
  • Wind: 0mphW 260°
  • Humidity: 100%
  • Dewpoint: 43°F
  • Pressure: 30.25"Hg
  • Visibility: 1mi
  • UV index: 0
  • ▼
In Harrisburg, currently, roads and buildings are barely visible as a dense fog settles over the city.
The temperature is a chilly 42.8°F. The current temperature is at the minimum expected for today.

Friday Oct 23, 2026

  • 75°F
  • 43°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 6mphESE 109°
  • Humidity: 62%
  • UV index: 4
  • Sunrise: 7:10 am CDT
  • Sunset: 6:06 pm CDT
  • ▼
On Friday, October 23, intermittent cloud cover is expected, allowing for some sunshine.
Significant variations in temperature are anticipated, peaking at a moderately hot 75.2°F and dropping to a low of a frosty 42.8°F.
The higher temperature of 75.2°F is more typical of September than October.
Sunrise will be at 7:10 am and sunset at 6:06 pm; the daylight will last for 10h and 56min.

Hourly overview

Hourly temperatures

Warmest period: 2 pm - 4 pm 73°C.
Coldest hour: 6 am 43°C.

Chance of precipitation

Highest chance: 6 am 15%.

Hourly weather forecast

  • 6 am
  • 43°F
  • Feels like:
    43°F
Cloudy
Cloudy
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 0mphS 180°
  • Humidity: 100%
  • Pressure: 30.24"Hg
  • Visibility: 2mi
  • UV index: 0
  • ▼
Sunrise: 7:10 am
  • 8 am
  • 45°F
  • Feels like:
    45°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 0mphS 180°
  • Humidity: 100%
  • Pressure: 30.27"Hg
  • Visibility: 1mi
  • UV index: 0
  • ▼
  • 10 am
  • 61°F
  • Feels like:
    61°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphE 93°
  • Humidity: 68%
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 12 pm
  • 70°F
  • Feels like:
    70°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphESE 107°
  • Humidity: 41%
  • Pressure: 30.27"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 2 pm
  • 73°F
  • Feels like:
    73°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 5mphE 95°
  • Humidity: 35%
  • Pressure: 30.21"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 4 pm
  • 73°F
  • Feels like:
    73°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 5mphE 90°
  • Humidity: 34%
  • Pressure: 30.21"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 6 pm
  • 68°F
  • Feels like:
    68°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphENE 76°
  • Humidity: 44%
  • Pressure: 30.21"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:06 pm
  • 8 pm
  • 57°F
  • Feels like:
    57°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphE 85°
  • Humidity: 67%
  • Pressure: 30.24"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 54°F
  • Feels like:
    54°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 1mphE 96°
  • Humidity: 79%
  • Pressure: 30.27"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Today, primarily clear and occasionally overcast weather is anticipated.
The temperature will be between the highest temperature of 73.4°F and the lowest temperature of 42.8°F. The warmest part of the day will be from 2 pm to 4 pm.
The maximum temperature will align more closely with September's average high of 80.8°F than with October's 67.8°F. The lowest temperature is more alike with November's average minimum of 38.7°F than the usual minimum of 49.3°F in October.
Updated: Oct 23, 2026 @ 10:17:41 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

The temperature at 5:17 am CDT is 42.8°F.

Today, in Harrisburg, high-altitude clouds may scatter across the sky, but the sun will still shine.

Today, the highest temperature will be 75.2°F, while the lowest temperature will be 42.8°F.
The highest temperature will be a couple of degrees higher than the average maximum of 67.8°F in October. The lowest temperature will be also a couple of degrees lower than the average low of 49.3°F.

On Friday, in Harrisburg, sunrise will be at 7:10 am and sunset at 6:06 pm (CDT).

Today, the daylight will last for 10h and 56min.