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Lanark Weather Warning NWS WEATHER ALERT FOR THE LANARK, IL AREA - Issued: 234 PM CDT Fri Sep 4 2026 Lanark Weather Warning

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61046 Weather (Lanark, IL)

Lanark, IL WeatherCurrent Conditions and Weather for Lanark, Illinois
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Clear at Lanark (61046), temperature is 95°F35°C, dew point 72°F22°C, humidity 47%. Wind direction is SSW at 7 mphat 11 km/h with visibility of 10 mi16 km. Barometric pressure is 29.88 in1012 mb. Last update: 4:29 pm.*
*Time is approximately 4:29 pm Fri, Sep 04, 2026. Time will be within 15 minutes of current local time. Lanark weather forecast data is updated every 15 minutes.

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Lanark IL Weather - 5:29 pm

Lanark Weather Forecast

Weather forecast for: Lanark IL
Last Update: 2:31 pm CDT Sep 4, 2026
This Afternoon: Sunny, with a high near 94. Heat index values as high as 103. Southwest wind around 10 mph.
Tonight: A slight chance of showers and thunderstorms between midnight and 2am. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm. Chance of precipitation is 20%.
Saturday: Patchy fog before 8am. Otherwise, sunny, with a high near 87. Northeast wind 5 to 10 mph.
Saturday Night: Partly cloudy, with a low around 63. East wind 5 to 10 mph.
Sunday: Mostly sunny, with a high near 83.
Sunday Night: Partly cloudy, with a low around 60.
Labor Day: Mostly sunny, with a high near 82.
Monday Night: Partly cloudy, with a low around 62.
Tuesday: Mostly sunny, with a high near 89.
Tuesday Night: A 50 percent chance of showers after 1am. Partly cloudy, with a low around 71.
Wednesday: Mostly sunny, with a high near 88.
Wednesday Night: A 30 percent chance of showers. Partly cloudy, with a low around 63.
Thursday: Mostly sunny, with a high near 80.

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