Weather forecast for todayPort Byron, IL

Weather forecast for today

Current condition 7:37 am CDT

  • 43°F
  • Feels like:
    43°F
Sunny
Sunny
  • Precipitation: 0"
  • Wind: 3mphE 100°
  • Humidity: 81%
  • Dewpoint: 37°F
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Currently, the sun is shining brightly, creating a warm atmosphere.
The temperature is a chilly 42.8°F. The current temperature is almost at the minimum-predicted 41°F for today.

Monday Oct 19, 2026

  • 70°F
  • 41°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 4mphSSE 165°
  • Humidity: 55%
  • UV index: 4
  • Sunrise: 7:18 am CDT
  • Sunset: 6:14 pm CDT
  • ▼
On Monday, in Port Byron, predominantly sunny weather will make for pleasant outdoor conditions.
A notable disparity in temperature is predicted, reaching up to a maximum of a pleasant 69.8°F and falling to a minimum of a cold 41°F.
The expected high of 69.8°F appears seasonally off, better matching September's typical values.
Sunrise was at 7:18 am and sunset will be at 6:14 pm; the daylight will last for 10h and 56min.

Hourly overview

Hourly temperatures

Warmest period: 2 pm - 4 pm 68°C.
Coldest hour: 8 am 43°C.

Chance of precipitation

Highest chance: 10 pm - 12 am 3%.

Hourly weather forecast

  • 8 am
  • 43°F
  • Feels like:
    43°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 3mphS 176°
  • Humidity: 82%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 9 am
  • 48°F
  • Feels like:
    48°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 3mphS 171°
  • Humidity: 74%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 10 am
  • 54°F
  • Feels like:
    54°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 4mphS 170°
  • Humidity: 61%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 11 am
  • 59°F
  • Feels like:
    59°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 4mphS 172°
  • Humidity: 55%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 12 pm
  • 63°F
  • Feels like:
    63°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphS 173°
  • Humidity: 47%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 1 pm
  • 66°F
  • Feels like:
    66°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphSSE 161°
  • Humidity: 43%
  • Pressure: 30.33"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 2 pm
  • 68°F
  • Feels like:
    68°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphSSE 166°
  • Humidity: 39%
  • Pressure: 30.33"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 3 pm
  • 68°F
  • Feels like:
    68°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphSSE 166°
  • Humidity: 38%
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 4 pm
  • 68°F
  • Feels like:
    68°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphSSE 164°
  • Humidity: 38%
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 5 pm
  • 66°F
  • Feels like:
    66°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphSSE 156°
  • Humidity: 41%
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 pm
  • 63°F
  • Feels like:
    63°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 3mphSE 135°
  • Humidity: 50%
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:14 pm
  • 7 pm
  • 57°F
  • Feels like:
    57°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphSE 126°
  • Humidity: 60%
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 8 pm
  • 54°F
  • Feels like:
    54°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 2mphESE 120°
  • Humidity: 69%
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 9 pm
  • 52°F
  • Feels like:
    52°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 2mphESE 122°
  • Humidity: 72%
  • Pressure: 30.33"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 50°F
  • Feels like:
    50°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 2mphESE 118°
  • Humidity: 77%
  • Pressure: 30.33"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 11 pm
  • 50°F
  • Feels like:
    50°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 2mphESE 117°
  • Humidity: 78%
  • Pressure: 30.33"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Today, in Port Byron, primarily dull and occasionally sunny weather is forecasted.
The temperature will be between a minimum of 42.8°F and a maximum of 68°F. The warmest part of the day will be from 2 pm to 4 pm.
The temperature will feel more consistent with September's average high than the expected maximum for October. The lowest temperature is expected to be a couple of degrees lower than the average minimum in October, typically 45°F.
Updated: Oct 19, 2026 @ 12:37:20 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

At 7:37 am CDT, the temperature is 42.8°F.

Today, expect brilliant sunshine under mostly clear skies.

Today, the maximum temperature will be 69.8°F, while the minimum temperature will be 41°F.
The highest temperature will be relatively higher than the average maximum of 61.3°F in October. The lowest temperature will be also relatively lower than the average low of 45°F.

On Monday, in Port Byron, sunrise was at 7:18 am and sunset will be at 6:14 pm (CDT).

In Port Byron, today, there will be 10h and 56min of daylight.