Weather forecast for todayPetersburg, IL

Weather forecast for today

Current condition 10:20 am CDT

  • 48°F
  • Feels like:
    46°F
Sunny
Sunny
  • Precipitation: 0"
  • Wind: 4mphNE 40°
  • Humidity: 62%
  • Dewpoint: 36°F
  • Pressure: 30.58"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
Currently, sunlight is streaming down, with a gentle warmth in the air.
The temperature is a chilly 48.2°F, and the real-feel temperature is almost the same at 46.4°F. The current temperature is relatively far from today's maximum-anticipated 59°F.

Saturday Oct 17, 2026

  • 59°F
  • 37°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 4mphSSW 200°
  • Humidity: 48%
  • UV index: 4
  • Sunrise: 7:12 am CDT
  • Sunset: 6:17 pm CDT
  • ▼
Today, uninterrupted sunshine is anticipated.
Temperature fluctuations between a refreshing 59°F and an icy 37.4°F are forecasted.
Today’s expected high is set to be relatively lower than October's regular high of 63.9°F.
Sunrise was at 7:12 am and sunset will be at 6:17 pm; the daylight will last for 11h and 5min.

Hourly overview

Hourly temperatures

Warmest period: 3 pm - 5 pm 57°C.
Coldest period: 11 pm - 1 am 41°C.

Chance of precipitation

Highest chance: 1 am 2%.

Hourly weather forecast

  • 11 am
  • 50°F
  • Feels like:
    50°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 3mphNE 41°
  • Humidity: 57%
  • Pressure: 30.56"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 12 pm
  • 54°F
  • Feels like:
    54°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphNE 52°
  • Humidity: 52%
  • Pressure: 30.53"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 1 pm
  • 55°F
  • Feels like:
    55°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphSSW 210°
  • Humidity: 47%
  • Pressure: 30.5"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 2 pm
  • 55°F
  • Feels like:
    55°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 1mphSW 219°
  • Humidity: 44%
  • Pressure: 30.5"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 3 pm
  • 57°F
  • Feels like:
    57°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphSSW 211°
  • Humidity: 41%
  • Pressure: 30.47"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 4 pm
  • 57°F
  • Feels like:
    57°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphSW 222°
  • Humidity: 39%
  • Pressure: 30.47"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 5 pm
  • 57°F
  • Feels like:
    57°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 3mphSW 215°
  • Humidity: 39%
  • Pressure: 30.45"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 pm
  • 54°F
  • Feels like:
    54°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphSSW 212°
  • Humidity: 51%
  • Pressure: 30.45"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:17 pm
  • 7 pm
  • 48°F
  • Feels like:
    48°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphSSW 193°
  • Humidity: 61%
  • Pressure: 30.45"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 8 pm
  • 46°F
  • Feels like:
    46°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphS 179°
  • Humidity: 67%
  • Pressure: 30.45"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 9 pm
  • 45°F
  • Feels like:
    45°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphS 170°
  • Humidity: 71%
  • Pressure: 30.45"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 43°F
  • Feels like:
    41°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 3mphSSE 168°
  • Humidity: 75%
  • Pressure: 30.45"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 11 pm
  • 41°F
  • Feels like:
    39°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 4mphS 170°
  • Humidity: 76%
  • Pressure: 30.45"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Today, in Petersburg, bright and mostly sunny weather is expected.
The temperature will vary between a minimum of 41°F and a maximum of 57.2°F. The warmest part of the day will be from 3 pm to 5 pm.
Today, expect temperatures a couple of degrees lower than what is usual for October. The lowest temperature is more resembling November's average minimum of 36°F than the usual minimum of 47.7°F in October.
Updated: Oct 17, 2026 @ 15:20:11 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

The temperature at 10:20 am CDT is 48.2°F.

On Saturday, sunny skies and pleasant visibility are expected.

Today, the highest temperature will be 59°F, while the lowest temperature will be 37.4°F.
Today, the highest temperature will be relatively lower than the average maximum temperature in October. The lowest temperature today will be significantly lower than the average low of 47.7°F.

On Saturday, in Petersburg, sunrise was at 7:12 am and sunset will be at 6:17 pm (CDT).

Today, the daylight will last for 11h and 5min.