Weather forecast for: Decatur IN
Last Update: 10:45 am EDT Sep 20, 2026
This Afternoon: Showers and possibly a thunderstorm. High near 73. Northeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight: Showers and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms between 10pm and 3am, then a chance of showers after 3am. Low around 56. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 65. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Monday Night: A 10 percent chance of showers before 8pm. Mostly cloudy, with a low around 53. Northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday: Mostly cloudy, with a high near 63. Northeast wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 53.
Wednesday: A 20 percent chance of showers before 2pm. Mostly cloudy, with a high near 64.
Wednesday Night: Mostly cloudy, with a low around 51.
Thursday: Mostly cloudy, with a high near 66.
Thursday Night: Mostly cloudy, with a low around 50.
Friday: Mostly sunny, with a high near 66.
Friday Night: Partly cloudy, with a low around 48.
Saturday: Mostly sunny, with a high near 69.
WeatherWorld.com
City of Decatur, IN
