Indianapolis/ Weather & Environment

Last Cool Breath Before 90-Degree Blast: Indianapolis Braces for Steamy Week

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Published on August 28, 2026
Last Cool Breath Before 90-Degree Blast: Indianapolis Braces for Steamy WeekSource: Google Street View

Indianapolis is getting one more comfortable morning before summer turns the dial back up. Friday starts near 66 degrees with mostly cloudy skies and patchy fog, but sunshine will take over and push the afternoon high to about 82.

Fog Clears For A Sunny Friday

Patchy fog may linger in spots until around 9 a.m., then skies should clear for a dry afternoon, according to the National Weather Service Indianapolis. North-northeast winds will stay light at 3 to 7 mph, while tonight turns mostly clear with temperatures falling to around 61.

Weekend Warm-Up Arrives Quickly

Saturday looks sunny and mild, with patchy fog possible between 7 and 8 a.m. before the temperature reaches about 84 degrees. Sunday then climbs to near 89 under mostly sunny skies, marking a quick warm-up from Thursday’s forecast of a cooler, low-80s day, as per Hoodline.

90-Degree Heat Takes Over Next Week

Monday is expected to reach 92 degrees, followed by highs near 93 Tuesday and 94 Wednesday. Wednesday brings a 20% chance of showers and thunderstorms after 2 p.m., while Thursday could see a slight shower or storm chance before 8 a.m. before mostly sunny skies return.

Outdoor Plans Stay Dry For Now

No watches, warnings or advisories are in effect for Indianapolis. Friday and Saturday offer the most comfortable stretch for outdoor plans, but Sunday through Thursday will feel increasingly hot and humid, so earlier outings and regular water breaks will be the better bet.