Weather forecast for todayMarietta, IL

Weather forecast for today

Current condition 12:08 am CDT

  • 45°F
  • Feels like:
    45°F
Clear
Clear
  • Precipitation: 0"
  • Wind: 3mphSSE 150°
  • Humidity: 75%
  • Dewpoint: 37°F
  • Pressure: 30.37"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
At the moment, a cloudless sky and calm conditions create ideal weather.
The temperature is a frosty 44.6°F. The current temperature is far from the maximum of 69.8°F anticipated for today.

Monday Oct 19, 2026

  • 70°F
  • 39°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 5mphSSE 157°
  • Humidity: 57%
  • UV index: 4
  • Sunrise: 7:17 am CDT
  • Sunset: 6:15 pm CDT
  • ▼
Today, in Marietta, golden sunshine will carry through the day.
The temperature will peak at an agreeable 69.8°F during the day, dropping to a low of a cold 39.2°F at night.
Forecasts suggest the maximum temperature will be a couple of degrees higher than October's average of 63°F.
Sunrise will be at 7:17 am and sunset at 6:15 pm; the daylight will last for 10h and 59min.

Hourly overview

Hourly temperatures

Warmest hour: 4 pm 68°C.
Coldest hour: 7 am 37°C.

Chance of precipitation

Highest chance: 7 am 4%.

Hourly weather forecast

  • 2 am
  • 43°F
  • Feels like:
    43°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 2mphS 172°
  • Humidity: 83%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 4 am
  • 39°F
  • Feels like:
    39°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 2mphS 184°
  • Humidity: 91%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 am
  • 37°F
  • Feels like:
    37°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 1mphS 169°
  • Humidity: 97%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 7:17 am
  • 8 am
  • 39°F
  • Feels like:
    39°F
Sunny
Sunny
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 2mphSSE 159°
  • Humidity: 95%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 am
  • 54°F
  • Feels like:
    54°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 4mphSSE 160°
  • Humidity: 67%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 12 pm
  • 64°F
  • Feels like:
    64°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphS 169°
  • Humidity: 45%
  • Pressure: 30.36"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 164°
  • Humidity: 38%
  • Pressure: 30.33"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 4 pm
  • 68°F
  • Feels like:
    68°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphSSE 151°
  • Humidity: 36%
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 6 pm
  • 61°F
  • Feels like:
    61°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphESE 122°
  • Humidity: 48%
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:15 pm
  • 8 pm
  • 54°F
  • Feels like:
    54°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphE 87°
  • Humidity: 70%
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 50°F
  • Feels like:
    50°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 2mphE 94°
  • Humidity: 78%
  • Pressure: 30.33"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Today, in Marietta, a combination of overcast and dry and sunny weather is anticipated.
The temperature will be between a maximum of 68°F and a minimum of 37.4°F. The warmest part of the day will be from 2 pm to 4 pm.
The forecasted high will be a few degrees higher than the typical October maximum of 63°F. The minimum temperature will be more similar to November's average low of 35.1°F than October's typical 46.6°F.
Updated: Oct 19, 2026 @ 05:08:36 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

The current temperature (12:08 am CDT) is 44.6°F.

Today, open skies and radiant sunshine are expected.

Today, the maximum temperature will be 69.8°F, while the minimum temperature will be 39.2°F.
The highest temperature will be a few degrees higher than the average maximum of 63°F in October. The lowest temperature will be also slightly cooler than the average low of 46.6°F.

On Monday, in Marietta, sunrise will be at 7:17 am and sunset at 6:15 pm (CDT).

In Marietta, Illinois, today, there will be 10h and 59min of daylight.