Johnston City, IL Weather Forecast and Current Conditions

Current Conditions From Nearby Station

Clear 32°F
Feels Like 32°F  
Humidity 84% Dew Point 28°F Wind ENE 1 MPH Gusts 4 Barometer 29.91 in.
Report from a MADIS/MESONET weather station 8.6 mi. SW of central Johnston City
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Point Forecast at a Glance

FriDec 12
Fri Dec 12: Partly Sunny, High 42F, Low 27F
42
27
SatDec 13
Sat Dec 13: Partly Sunny, High 36F, Low 8F
36
8
SunDec 14
Sun Dec 14: Sunny, High 17F, Low 7F
17
7
MonDec 15
Mon Dec 15: Sunny, High 35F, Low 24F
35
24
TueDec 16
Tue Dec 16: Mostly Sunny, High 46F, Low 37F
46
37
WedDec 17
Wed Dec 17: Mostly Cloudy, High 55F, Low 48F
55
48
ThuDec 18
Thu Dec 18: Showers, High 59F
50%
59
 

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7-Day Temperature Trend

Week Ahead Summary

High temperatures dip from 42°F to a low of 17°F mid-week, then warm to 59°F. Some rain possible with at least 2 days showing precipitation chances of 20% or higher.

Climate Context

This week's forecast shows temperatures running 5°F below the historical average for December. Normal highs for this period are around 46°F with lows around 28°F.

This Date in Weather History

1969 - The worst tornado of record for western Washington State tracked south of Seattle, traveling five miles, from Des Moines to Kent. The tornado, 50 to 200 yards in width, began as a waterspout over Puget Sound. One person was injured and the tornado caused half a million dollars damage.

More on this and other weather history

Johnston City, IL 7 Day Weather Forecast Details

Friday Dec 12

Partly Sunny

Day: Partly sunny, with a high near 42. East northeast wind 6 to 10 mph becoming north northwest in the afternoon.

Mostly Cloudy

Night: Mostly cloudy, with a low around 27. North wind 5 to 7 mph becoming calm in the evening.

Saturday Dec 13

Partly Sunny

Day: Partly sunny, with a high near 36. Light and variable wind becoming north 5 to 10 mph in the morning.

Mostly Clear

Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 8. Wind chill values as low as -6. North wind 10 to 14 mph, with gusts as high as 21 mph.

Sunday Dec 14

Sunny

Day: Sunny, with a high near 17. North northwest wind 7 to 13 mph, with gusts as high as 20 mph.

Mostly Clear

Night: Mostly clear, with a low around 7. North wind around 5 mph becoming calm in the evening.

Monday Dec 15

Sunny

Day: Sunny, with a high near 35. Light south southeast wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

Mostly Clear

Night: Mostly clear, with a low around 24. South southwest wind 5 to 7 mph.

Tuesday Dec 16

Mostly Sunny

Day: Mostly sunny, with a high near 46. South southwest wind 6 to 10 mph.

Mostly Cloudy

Night: Mostly cloudy, with a low around 37. South southwest wind around 9 mph.

Wednesday Dec 17

Mostly Cloudy

Day: Mostly cloudy, with a high near 55. South southwest wind 9 to 13 mph, with gusts as high as 20 mph.

Showers

Night: A chance of showers. Mostly cloudy, with a low around 48. South southwest wind 11 to 14 mph, with gusts as high as 21 mph.

Thursday Dec 18

Showers

Day: A chance of showers. Partly sunny, with a high near 59. South southwest wind 8 to 14 mph becoming west in the afternoon. Winds could gust as high as 22 mph.


About Johnston City, IL

Johnston City is a city in Williamson County, Illinois, United States. The population was 3,348 at the 2020 census. This was a center of coal mining in the early 20th century, having a peak of population in the 1920s. The mining jobs attracted many immigrants from Europe.

Content from Wikipedia, licensed under CC BY-SA 3.0.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.