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Arlington Heights, Illinois Weather Forecast
Arlington Heights, Illinois Weather
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Weather Forecast for Arlington Heights, Illinois : Cook County
Issued: 8:01 am CST Jan 18, 2026 Latitude: 42.0883603 Longitude: -87.9806265 View on Google Maps

MouseOver for Detail Forecast
Today Tonight M.L.King Day Tuesday Wednesday Thursday Friday Saturday
70% chance of snow on Today 90% chance of snow on Tonight Mostly Sunny on M.L.King Day Mostly Sunny on Tuesday 30% chance of snow on Wednesday Mostly Sunny on Thursday 20% chance of snow on Friday 20% chance of snow on Saturday
High: 19°F Low: 1 °F High: 4 °F High: 20°F High: 29°F High: 20°F High: 27°F High: 16°F
Low: 1 °F Low: 14°F Low: 10°F Low: 12°F Low: 9°F  
Snow Snow Mostly Sunny Mostly Sunny Snow Mostly Sunny Snow Snow
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70% chance of snow Today Today... Snow likely, mainly after 5pm. Mostly cloudy, with a high near 19. Wind chill values as low as -6. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. Total daytime snow accumulation of less than a half inch possible.
90% chance of snow Tonight Tonight... Snow, mainly before 11pm. Low around 1. Wind chill values as low as -17. Blustery, with a southwest wind 10 to 15 mph becoming west northwest 20 to 25 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Mostly Sunny on M.L.King Day M.L.King Day... Mostly sunny and cold, with a steady temperature around 4. Wind chill values as low as -19. Blustery, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Mostly Clear on Monday Night Monday Night... Mostly cloudy, then gradually becoming mostly clear, with a low around 1. Wind chill values as low as -12. West wind 10 to 15 mph, with gusts as high as 20 mph.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 20. West southwest wind 5 to 10 mph, with gusts as high as 15 mph.
40% chance of snow Tuesday Night Tuesday Night... A 40 percent chance of snow. Mostly cloudy, with a low around 14.
30% chance of snow Wednesday Wednesday... A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 29.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 10.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 20.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 12.
20% chance of snow Friday Friday... A chance of snow. Mostly cloudy, with a high near 27.
20% chance of snow Friday Night Friday Night... A chance of snow. Mostly cloudy, with a low around 9.
20% chance of snow Saturday Saturday... A chance of snow. Partly sunny, with a high near 16.
Sun Almanac for Arlington Heights, Illinois
Sunrise: 07:16 AM
Sunset: 4:49 PM
Civil Sunrise:06:45 AM
Civil Sunset: 5:20 PM
Nautical Sunrise: 06:11 AM
Nautical Sunset: 5:54 PM
Astro Sunrise: 05:38 AM
Astro Sunset: 6:27 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.