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Marietta, IL Weather Conditions

Updated: Wed Mar 11th 2026 8:00 PM CDT

Partly Cloudy

39^°F 4^°C

Feels Like 31^°F / -0^°C

Marietta, IL weather condition is Partly Cloudy and 39°F.

Today's Weather in Marietta,IL

The current weather in Marietta IL as of 8:00 PM CDT on Wed Mar 11th 2026, has a sky condition of Partly Cloudy with the visibility of 9 mile(s). It is 39 degrees fahrenheit but feels like 31 degrees. The barometric pressure is 30.22 - measured by inches of mercury - and is rising since its last observation. The humidity is 76 percent that's falling since the last report, with a dew point of 31 degrees fahrenheit which is falling. Wind direction is from the North-Northwest at 12.8 miles per hour, gusting at 20.2 miles per hour. Sunrise was at 7:20 AM and Sunset was at 7:04 PM. The moon phase is a Last Quarter moon rising at 2:50 AM. Thank you for listening to the weather report from LocalConditions.com!

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Sun & Moon

Sun

Sunrise: 7:20 AM

Sunset: 7:04 PM

As of:

Moon

Moonrise: 2:50 AM

Moonset: 11:27 AM

Phase: Last Quarter Moon

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Radar Alerts Next 48 Hours Traffic

Hourly Forecast - Next 8 hours

Next 5 Days...

Partly Cloudy

Partly Cloudy with a high of 54°F and a low of 28°F. Winds will be strong at speeds peaking at 26mph. The humidity will be on the higher side, reaching around 63%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 54° \| Lo 28°	63%	0%	0%	25.3 mph

Cloudy

Cloudy with a high of 54°F and a low of 40°F. Winds will be strong at speeds peaking at 29mph. Humidity levels are comfortable, sitting around 49%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 54° \| Lo 40°	49%	0%	0%	28.4 mph

Overcast

Overcast with a high of 49°F and a low of 34°F. Winds will be moderate, blowing around 16mph. Humidity levels are comfortable, sitting around 50%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 49° \| Lo 34°	50%	0%	0%	15.9 mph

Moderate Rain

Moderate Rain with a high of 61°F and a low of 27°F. Probable rainfall forecasted, having an 89% chance with an estimated 0.21in. Possible light Snowfall with a 10% chance but not having significate accumulation. Winds will be strong at speeds peaking at 30mph. Expect high humidity with levels above 80% to 82%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 61° \| Lo 27°	82%	89% \| est. 0.21in	10%	30 mph

Blowing Snow

Blowing Snow with a high of 18°F and a low of 12°F. Probable rainfall forecasted, having an 82% chance with an estimated 0.02in. Snow is likely with a 44% chance having an estimated 0in. Winds will be strong at speeds peaking at 29mph. The humidity will be on the higher side, reaching around 74%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 18° \| Lo 12°	74%	82% \| est. 0.02in	44% \| est. 0in	28.2 mph

Yesterday 5-Day Wind

Weather Radar Map

Live Marietta, IL weather with minute-by-minute precipitation, radar, barometric pressure, temperatures and wind speeds for today thru Sunday, as you toggle through each map layer. Use the slider to move forward and back in time to view how current data and forecasts will affect the region; you can press or click on the map to show metrics available for each tab. The related timestamp is located above the Play button which will animate the weather forecast.

Hourly Temperature

The current temperature today is 39^°F. The morning temperature of 41°^F is lowest at 9am with the daytime high of 39°^F at 11am and a low around 33°^F at 11pm is expected.

Hourly Barometric Pressure

The highest pressure today is 30.29^inHg at 11pm and lowest being 29.6^inHg at 3am.

Hourly Wind Speeds

The fastest wind is reported to be 23.5^mph at 2am, while the slowest is 7.4^mph around 11pm; expect wind gusts peaking 34.7^mph at 1am. View live wind conditions in Marietta

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