Indianapolis, Indiana – Blue skies are giving way to building clouds across central Indiana, and the calm start won’t last. Sticky air already hangs over Indianapolis, with afternoon heat, thunderstorms and smoky skies creating a busy weather day for families and travelers.
Heat index values could reach 103 degrees across central Indiana today before scattered thunderstorms develop later this afternoon and evening. According to the National Weather Service in Indianapolis, isolated storms may strengthen into a line this evening, with damaging wind gusts posing the primary threat. While tornado potential remains low, meteorologists recommend staying weather-aware if outdoor plans extend into the evening.
Adding to the concern, the Indiana Department of Environmental Management has issued an Air Quality Alert through Monday night. Fine particulate pollution (PM2.5), influenced in part by wildfire smoke, is expected to reach levels considered unhealthy for sensitive groups. Children, older adults, and anyone with asthma or other respiratory conditions should limit prolonged outdoor activity and keep windows closed when possible.
Today’s high reaches 91 degrees, while temperatures remain well above average through early next week. Sunday turns mostly sunny with a high near 86 degrees, offering a brief break from widespread storm activity before another active pattern develops.
Additional showers and thunderstorms become likely Monday night into Tuesday, with highs returning to 88 to 89 degrees. Some storms could become strong, although details on timing and intensity remain uncertain.
If you’re traveling on Interstates 65, 69, 70 or 74, plan for rapidly changing conditions this evening. Heavy rain may briefly reduce visibility, while gusty winds could make driving difficult. Keep a weather app handy and delay outdoor activities if thunder develops nearby.
Looking farther ahead, temperatures ease into the upper 70s by Wednesday before warmer-than-normal conditions return later next week. More updates and advisories may be issued as the next round of storms approaches.
Five-Day Forecast for Indianapolis, Indiana
- Sunday: Mostly sunny. High 86°F, Low 66°F.
- Monday: Mostly sunny. High 88°F, Low 72°F. Showers likely late.
- Tuesday: Showers likely with thunderstorms possible. High 89°F, Low 66°F.
- Wednesday: Sunny. High 79°F, Low 59°F.
- Thursday: Sunny. High 80°F, Low 62°F.
