Indianapolis/ Weather & Environment

Frost To Flip-Flops: Indianapolis Shivers Early, Basks At 68 By Afternoon

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Published on October 19, 2026
Frost To Flip-Flops: Indianapolis Shivers Early, Basks At 68 By AfternoonSource: Google Street View

Indianapolis is starting Monday with clear skies, calm winds and temperatures near 45 degrees, but a chilly frost threat is lingering through the morning. A Frost Advisory remains in effect until 9 a.m., followed by a sunny afternoon that should reach 68 degrees.

The National Weather Service Indianapolis said patchy frost could form through about 8 a.m. across central Indiana. Sensitive outdoor plants may be damaged, so tender vegetation is the main concern before the morning chill gives way to a quiet, dry day.

Sunny Stretch Builds Through The Week

Monday afternoon will stay mostly windless, with an east-southeast breeze around 1 mph and no rain in the forecast. Monday night will be mostly clear with a low near 43, setting up another cool start Tuesday before temperatures climb to about 70 under sunny skies.

The mild pattern holds through Friday, with highs near 70 on Wednesday, 71 Thursday and 70 Friday. Overnight lows will generally settle in the mid-40s, so residents can expect a noticeable morning chill even as afternoons feel comfortably mild.

Weekend Looks Warm And Mostly Dry

Saturday is forecast to be sunny with a high near 72, followed by a partly cloudy night around 50 degrees. Sunday should be mostly sunny and warmer, reaching about 73, with only a 1% chance of precipitation.

For now, the forecast is a rare stretch of easy autumn weather: protect the plants early, then enjoy several days of sunshine and light winds. No significant rain is expected through the weekend.