Johnston City, Illinois | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Partly Cloudy
    64°
    Friday 5/17
    Forecast night icon
    64°
    Partly Cloudy
    Hourly
    Night Details
    Partly cloudy. Areas of fog. Near steady temperature in the lower 60s. Calm winds.
  • Forecast day icon
    Saturday
    Mostly Sunny
    80°
    Forecast night icon
    Night
    Mostly Clear
    65°
    Saturday 5/18
    Day
    80°
    Mostly Sunny
    Forecast day icon
    Night
    65°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Areas of fog in the morning. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. East winds around 5 mph. Chance of rain 20 percent.
    Night Details
    Mostly clear. Lows in the lower 60s. North winds around 5 mph in the evening becoming light and variable.
  • Forecast day icon
    Sunday
    Sunny
    86°
    Forecast night icon
    Night
    Mostly Clear
    66°
    Sunday 5/19
    Day
    86°
    Sunny
    Forecast day icon
    Night
    66°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the upper 80s. Calm winds becoming southeast around 5 mph in the afternoon.
    Night Details
    Mostly clear. Lows in the mid 60s. Calm winds becoming south around 5 mph after midnight.
  • Forecast day icon
    Monday
    Mostly Sunny
    87°
    Forecast night icon
    Night
    Mostly Clear
    69°
    Monday 5/20
    Day
    87°
    Mostly Sunny
    Forecast day icon
    Night
    69°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs in the upper 80s.
    Night Details
    Mostly clear. Lows in the upper 60s. Highs around 90.
  • Forecast day icon
    Tuesday
    Mostly Sunny
    88°
    Forecast night icon
    Night
    50% Chance of Storms
    72°
    Tuesday 5/21
    Day
    88°
    Mostly Sunny
    Forecast day icon
    Night
    72°
    50% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly clear. Lows in the upper 60s. Highs around 90.
    Night Details
    Partly cloudy in the evening then becoming mostly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 50 percent.
  • Forecast day icon
    Wednesday
    60% Chance of Storms
    83°
    Forecast night icon
    Night
    60% Chance of Storms
    64°
    Wednesday 5/22
    Day
    83°
    60% Chance of Storms
    Forecast day icon
    Night
    64°
    60% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Partly sunny with a chance of thunderstorms. A chance of showers in the morning then showers likely in the afternoon. Highs in the mid 80s. Chance of rain 60 percent.
    Night Details
    A chance of thunderstorms. Showers likely mainly in the evening. Lows in the lower 60s. Chance of rain 60 percent.
  • Forecast day icon
    Thursday
    Mostly Sunny
    79°
    Forecast night icon
    Night
    40% Chance of Storms
    61°
    Thursday 5/23
    Day
    79°
    Mostly Sunny
    Forecast day icon
    Night
    61°
    40% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs in the lower 80s.
    Night Details
    Partly cloudy. A chance of showers and thunderstorms. Lows in the lower 60s. Highs in the lower 80s. Chance of rain 40 percent.
  • Forecast day icon
    Friday
    40% Chance of Storms
    79°
    Forecast night icon
    Night
    40% Chance of Rain
    63°
    Friday 5/24
    Day
    79°
    40% Chance of Storms
    Forecast day icon
    Night
    63°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy. A chance of showers and thunderstorms. Lows in the lower 60s. Highs in the lower 80s. Chance of rain 40 percent.
    Night Details
    Clear with a chance of rain. Chance of precipitation 35%. Low temperature around 63F. Dew point will be around 60F with an average humidity of 77%. Winds will be 3 mph from the SE.
  • Forecast day icon
    Saturday
    50% Chance of Rain
    80°
    Forecast night icon
    Night
    40% Chance of Rain
    66°
    Saturday 5/25
    Day
    80°
    50% Chance of Rain
    Forecast day icon
    Night
    66°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy with a chance of rain. Chance of precipitation 45%. High temperature around 80F. Dew point will be around 64F with an average humidity of 72%. Winds will be 4 mph from the S.
    Night Details
    Partly cloudy with a chance of rain. Chance of precipitation 40%. Low temperature around 66F. Dew point will be around 65F with an average humidity of 81%. Winds will be 3 mph from the S.
  • Forecast day icon
    Sunday
    50% Chance of Rain
    82°
    Forecast night icon
    Night
    60% Chance of Rain
    66°
    Sunday 5/26
    Day
    82°
    50% Chance of Rain
    Forecast day icon
    Night
    66°
    60% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy with a 45% chance for rain and thunderstorms. High temperature around 82F. Dew point will be around 66F with an average humidity of 73%. Winds will be 3 mph from the S.
    Night Details
    Mostly clear with a 55% chance for rain and thunderstorms. Low temperature around 66F. Dew point will be around 65F with an average humidity of 80%. Winds will be 2 mph from the S.