National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Overcast

62°F

17°C

Humidity 90%
Wind Speed NE 7 mph
Barometer 30.08 in (1017.9 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 14 Oct 9:51 am CDT
Extended Forecast for

Round Lake ILSimilar City Names

  • Today

    Today: A 20 percent chance of showers before 11am. Mostly cloudy, with a high near 63. Northeast wind around 10 mph.

    High: 63 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 54. Northeast wind around 10 mph, with gusts as high as 15 mph.

    Low: 54 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain likely, then rain and possibly a thunderstorm after 1pm. High near 58. East wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 58 °F

    Rain Likely
    then Rain

  • Thursday Night

    Thursday Night: Rain and possibly a thunderstorm before 1am, then a slight chance of rain. Low around 48. North wind 5 to 10 mph becoming northwest 10 to 15 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%.

    Low: 48 °F

    Rain

  • Friday

    Friday: A 30 percent chance of rain before 1pm. Partly sunny, with a high near 54. Breezy, with a northwest wind around 20 mph, with gusts as high as 35 mph.

    High: 54 °F

    Chance Rain
    and Breezy

  • Friday Night

    Friday Night: Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 34.

    Low: 34 °F

    Partly Cloudy
    then Frost

  • Saturday

    Saturday: Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 56.

    High: 56 °F

    Frost then
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of showers before 11am. Mostly cloudy, with a high near 63. Northeast wind around 10 mph.
Tonight
Mostly cloudy, with a low around 54. Northeast wind around 10 mph, with gusts as high as 15 mph.
Thursday
Rain likely, then rain and possibly a thunderstorm after 1pm. High near 58. East wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Rain and possibly a thunderstorm before 1am, then a slight chance of rain. Low around 48. North wind 5 to 10 mph becoming northwest 10 to 15 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%.
Friday
A 30 percent chance of rain before 1pm. Partly sunny, with a high near 54. Breezy, with a northwest wind around 20 mph, with gusts as high as 35 mph.
Friday Night
Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 34.
Saturday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 56.
Saturday Night
Mostly clear, with a low around 38.
Sunday
Sunny, with a high near 65.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Partly sunny, with a high near 67.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Round Lake ILSimilar City Names
 42.35°N 88.11°W
Last Update:
9:26 am CDT Oct 14, 2026
Forecast Valid:
9am CDT Oct 14, 2026-6pm CDT Oct 20, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation