Indianapolis started Saturday, July 25, on the calm side of summer. Mostly clear skies, cool air near 63°F at the airport, and a light southeast breeze made the city feel more early fall than late July. The break will not last long.
Afternoon And Evening
Saturday afternoon stays agreeable, with partly sunny skies and highs near 80°F. A stray shower could pop up, mainly over southwest central Indiana, but most neighborhoods stay dry. South winds at about 1–6 mph keep things comfortable for outdoor plans, and any isolated showers should fade by this evening.
As the sun goes down, low-level moisture sneaks back in while winds stay light. That combination may lay the groundwork for some patchy fog overnight into early Sunday.
Foggy Mornings, Then Big Heat
Patchy fog is possible early Sunday, with pockets of reduced visibility before around 9 a.m. Once it burns off, the real heat starts to move in. Highs climb to around 91°F on Sunday, then push toward about 95°F on Monday.
The humidity will pile on. By Monday afternoon, heat-index values could reach roughly 100–105°F, according to the National Weather Service. That is the kind of heat where you want to time yard work, exercise, and other heavy lifting for the morning or later in the evening.
Storm Threat Sunday Night Into Monday Night
Late Sunday into Monday night, forecasters see a growing chance that clusters of thunderstorms will organize and push into central Indiana. The main concerns are damaging straight-line winds and localized heavy rain.
Coverage will not be perfectly even across the metro, but stronger storm complexes could deliver quick-hitting bursts of heavy downpours and gusts strong enough to knock over unsecured items. If you have outdoor plans Sunday night or Monday evening, it is smart to have an indoor backup and keep an eye on updates.
How To Prepare
Hydrate early and often, limit mid-afternoon outdoor exertion Sunday and Monday, and check in on neighbors or family who do not have air conditioning. For relief from the heat, Indy Parks maintains a list of staffed family centers operating as cooling options. Call 2-1-1 for help or see the city’s cooling-center list at Indy Parks.
This follows earlier mid-July heat impacts across the city. For background on how the season has already tested Indy, see Indy sizzles as midweek heat advisory slams city.
