Johnston City, IL Weather Forecast
Williamson County, Illinois
Live radar, warnings and storm tracking for Johnston City, with free alerts the moment it counts.
The next few hours
A dry evening, mostly sunny
It is 54° with a dew point of 45°, which is dry for this time of year. The sky is mostly sunny.
The wind backs into the west-northwest around 6 AM, which is the turn that usually comes ahead of the change rather than after it. Nothing in the next day and a half is wet enough to move plans for.
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Quiet through the next day and a half
Nothing wet is expected over the next day and a half.
The overnight low settles near 40°. Tomorrow tops out near 55°.
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
26–65°F across the weekThe week runs between 26° and 55°, with Tuesday the warmest day of it. There is no real trend across it: one day looks much like the next. Friday is the wettest day, peaking near 42%. 6 of the 7 days stay dry.
Free alerts for Johnston City
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Johnston City, IL at a glance
Johnston City is home to about 3,308 people in Williamson County, across 2.1 square miles. It ranks 402nd by population of 441 places in Illinois with a forecast here. The nearest neighbour with its own forecast is West Frankfort, 5 miles away.
- County
- Williamson County
- Population
- 3,308 2023 est.
- Land area
- 2.1 sq mi
- People per sq mi
- 1,563
- Forecast point
- 37.8210°N, 88.9293°W
How well can the network see Johnston City?
The nearest Doppler radar is KPAH (Paducah, KY), to the S. Its lowest scan passes about 3,800 ft above Johnston City. Close enough to see rotation in the low part of a storm, where tornadoes form.
The closest weather station is KMWA (Marion Rgnl). Representative on most days, though a thunderstorm can hit one and miss the other.
Forecasts near Johnston City
- West Frankfort, IL5 mi
- Herrin, IL6 mi
- Marion, IL6 mi
- Carterville, IL9 mi
- Christopher, IL12 mi
- Benton, IL13 mi
- Carbondale, IL17 mi
- Du Quoin, IL21 mi
Elsewhere in Illinois
ChicagoAuroraJolietNapervilleRockfordElginAll Illinois forecasts →