Indianapolis/ Weather & Environment

Indianapolis Sizzles to 87 Before Overnight Storms Flip Switch to Fall

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Published on October 01, 2026
Indianapolis Sizzles to 87 Before Overnight Storms Flip Switch to FallSource: Google Street View

Indianapolis is starting Thursday under mostly cloudy skies, but the city is headed for one more summerlike afternoon before a sharp weather turn. Temperatures will climb from the upper 60s early to around 87 degrees, with storms arriving overnight and much cooler air settling in by Friday.

One More Warm Afternoon

Thursday will stay mostly cloudy while south-southwest winds reach 8 to 13 mph, with gusts as high as 26 mph. According to the National Weather Service, rain chances remain minimal during the day, giving Indianapolis a warm and breezy window before the front moves in.

Storms Move In After Dark

Showers and thunderstorms are possible Thursday evening, followed by widespread showers and thunderstorms overnight. The forecast calls for a 100% chance of precipitation after that window, with roughly one-half to three-quarters of an inch of rain possible.

Friday will remain cloudy, with showers likely before 11 a.m. A few rumbles of thunder cannot be ruled out, but thunderstorms are unlikely before 2 p.m. The high will reach only about 67 degrees, while north winds gusting up to 22 mph could make the wet morning commute feel even cooler.

Sunny Weekend Brings A Serious Cooldown

The storm timing is now focused on Thursday night and Friday, a sharper update from Hoodline's earlier forecast. Friday night should turn partly cloudy and chilly, with a low near 49 degrees.

Saturday will bring sunny skies and a high near 68, followed by another sunny day Sunday with a high around 72. Dry weather continues into next week, with highs in the mid-60s Monday and Tuesday before a modest warm-up to about 74 Wednesday; overnight lows will generally run in the 40s, including a low near 43 Monday night.

No watches, warnings or advisories are currently listed for the Indianapolis area. For outdoor plans, Thursday afternoon offers the warmest window, while Friday morning is the day to keep an umbrella and a little extra travel time handy.