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Jefferson County, IL Weather Conditions

Updated: Sun Mar 8th 2026 5:30 PM WAT

Sunny

100^°F 38^°C

Feels Like 99^°F / 37^°C

Jefferson County, IL weather condition is Sunny and 100°F.

Today's Weather in Jefferson County,IL

The current weather in Jefferson County IL as of 5:30 PM WAT on Sun Mar 8th 2026, has a sky condition of Sunny with the visibility of 6 mile(s) and the UV index at 1.2. It is 100 degrees fahrenheit but feels like 99 degrees. The barometric pressure is 29.68 - measured by inches of mercury - and is rising since its last observation. The humidity is 29 percent that's rising since the last report, with a dew point of 47 degrees fahrenheit which is falling. Wind direction is from the North at 2.2 miles per hour, gusting at 6.7 miles per hour. Sunrise was at 6:52 AM and Sunset is at 6:53 PM. The moon phase is a Waning Gibbous moon rising at 11:00 PM. Thank you for listening to the weather report from LocalConditions.com!

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Sun & Moon

Sun

Sunrise: 6:52 AM

Sunset: 6:53 PM

As of:

Moon

Moonrise: 11:00 PM

Moonset: 10:07 AM

Phase: Waning Gibbous Moon

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Radar Alerts Next 48 Hours Traffic

Hourly Forecast - Next 8 hours

Next 5 Days...

Scattered Rain

Scattered Rain with a high of 105°F and a low of 77°F. Probable rainfall forecasted, having a 70% chance with an estimated 0.01in. Winds will be moderate, blowing around 16mph. Humidity levels are comfortable, sitting around 55%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 105° \| Lo 77°	55%	70% \| est. 0.01in	0%	15.2 mph

Sunny

Sunny with a high of 104°F and a low of 76°F. Winds will be moderate, blowing around 14mph. Humidity levels are comfortable, sitting around 55%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 104° \| Lo 76°	55%	0%	0%	13.4 mph

Partly Cloudy

Partly Cloudy with a high of 101°F and a low of 77°F. Winds will be moderate, blowing around 18mph. The humidity will be on the higher side, reaching around 61%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 101° \| Lo 77°	61%	0% \| est. 0in	0%	17.7 mph

Scattered Rain

Scattered Rain with a high of 102°F and a low of 76°F. Probable rainfall forecasted, having an 81% chance with an estimated 0.11in. Winds will be moderate, blowing around 15mph. Humidity levels are comfortable, sitting around 60%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 102° \| Lo 76°	60%	81% \| est. 0.11in	0%	14.3 mph

Scattered Rain

Scattered Rain with a high of 95°F and a low of 77°F. Probable rainfall forecasted, having a 77% chance with an estimated 0.03in. Winds will be moderate, blowing around 12mph. The humidity will be on the higher side, reaching around 63%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 95° \| Lo 77°	63%	77% \| est. 0.03in	0%	11.2 mph

Yesterday 5-Day Wind

Weather Radar Map

Live Jefferson County, 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 100^°F. The morning temperature of 77°^F is lowest at 7am with the daytime high of 105°^F at 1pm and a low around 84°^F at 11pm is expected.

Hourly Barometric Pressure

The highest pressure today is 29.81^inHg at 9am and lowest being 29.62^inHg at 4pm.

Hourly Wind Speeds

The fastest wind is reported to be 13.4^mph at 9pm, while the slowest is 0.9^mph around 1pm; expect wind gusts peaking 16.2^mph at 9pm. View live wind conditions in Jefferson County

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