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Williamson, IL Weather Conditions

Updated: Sun Mar 15th 2026 10:15 PM CDT

Overcast

35^°F 2^°C

Feels Like 24^°F / -5^°C

Williamson, IL weather condition is Overcast and 35°F.

Today's Weather in Williamson,IL

The current weather in Williamson IL as of 10:15 PM CDT on Sun Mar 15th 2026, has a sky condition of Overcast with the visibility of 9 mile(s). It is 35 degrees fahrenheit but feels like 24 degrees. The barometric pressure is 29.52 - measured by inches of mercury - and is falling since its last observation. The humidity is 90 percent that's falling since the last report, with a dew point of 35 degrees fahrenheit which is falling. Wind direction is from the West-Northwest at 21.9 miles per hour, gusting at 28.5 miles per hour. Sunrise was at 7:11 AM and Sunset was at 7:07 PM. The moon phase is a Waning Crescent moon rising at 5:31 AM. Thank you for listening to the weather report from LocalConditions.com!

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Sun & Moon

Sun

Sunrise: 7:11 AM

Sunset: 7:07 PM

As of:

Moon

Moonrise: 5:31 AM

Moonset: 3:37 PM

Phase: Waning Crescent Moon

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Radar Alerts Next 48 Hours Traffic

Hourly Forecast - Next 8 hours

Next 5 Days...

Light Freezing Rain

Light Freezing Rain with a high of 33°F and a low of 22°F. Probable rainfall forecasted, having an 87% chance with an estimated 0.09in. Snow is likely with a 36% chance having an estimated 0.4in. Winds will be strong at speeds peaking at 26mph. The humidity will be on the higher side, reaching around 69%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 33° \| Lo 22°	69%	87% \| est. 0.09in	36% \| est. 0.4in	25.3 mph

Light Freezing Rain

Light Freezing Rain with a high of 37°F and a low of 18°F. Probable rainfall forecasted, having a 65% chance with an estimated 0.01in. Possible light Snowfall with a 3% chance estimated at 0.1in accumulation. Winds will be moderate, blowing around 15mph. Humidity levels are comfortable, sitting around 43%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 37° \| Lo 18°	43%	65% \| est. 0.01in	3% \| est. 0.1in	15 mph

Partly Cloudy

Partly Cloudy with a high of 68°F and a low of 34°F. Winds will be moderate, blowing around 17mph. The humidity will be on the higher side, reaching around 63%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 68° \| Lo 34°	63%	0%	0%	16.3 mph

Partly Cloudy

Partly Cloudy with a high of 71°F and a low of 38°F. Winds will be moderate, blowing around 13mph. The humidity will be on the higher side, reaching around 75%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 71° \| Lo 38°	75%	0%	0%	12.5 mph

Sunny

Sunny with a high of 73°F and a low of 48°F. Winds will be light at 9mph at times. The humidity will be on the higher side, reaching around 75%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 73° \| Lo 48°	75%	0%	0%	8.3 mph

Yesterday 5-Day Wind

Weather Radar Map

Live Williamson, IL weather with minute-by-minute precipitation, radar, barometric pressure, temperatures and wind speeds for today thru Thursday, 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 35^°F. The morning temperature of 53°^F is lowest at 2am with the daytime high of 64°^F at 2pm and a low around 35°^F at 10pm is expected.

Hourly Barometric Pressure

The highest pressure today is 29.72^inHg at 12am and lowest being 29.29^inHg at 5pm.

Hourly Wind Speeds

The fastest wind is reported to be 25.1^mph at 12pm, while the slowest is 14.1^mph around 12am; expect wind gusts peaking 37.2^mph at 12pm. View live wind conditions in Williamson

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