Temperatures are expected to fall as low as 34 degrees tonight throughout most of south-central Indiana. Wind chills could drop to 26 degrees.
National Weather Service officials have issued a frost advisory from 2 a.m. until 9 a.m. Thursday.
The cold conditions could kill crops, flowers, and other sensitive vegetation and damage outdoor plumbing.
Forecasters say the first freeze of the season is likely Thursday night into Friday morning.
Highs are expected to reach 60 by the end of the week. A slight chance of rain showers is possible Saturday night into Sunday.