Harman US

Dayton, IN Weather & Growing Conditions

This Afternoon
81°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly sunny, with a high near 81. South southwest wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 81°F Chance Showers And Thunderstorms 5 mph SSW 31%
Tonight 69°F Chance Showers And Thunderstorms 5 mph SSE 29%
Sunday 80°F Chance Showers And Thunderstorms 1 to 9 mph N 58%
Sunday Night 57°F Showers And Thunderstorms Likely then Chance Showers And Thunderstorms 13 mph NE 60%
Monday 68°F Chance Showers And Thunderstorms 12 to 15 mph ENE 53%
Monday Night 53°F Chance Showers And Thunderstorms 9 to 14 mph ENE 48%
Tuesday 67°F Chance Showers And Thunderstorms 10 to 14 mph NE 34%
Tuesday Night 53°F Chance Showers And Thunderstorms 7 to 13 mph NE 34%
Wednesday 68°F Mostly Cloudy 9 mph NNE 13%
Wednesday Night 53°F Mostly Cloudy 3 to 9 mph NNE 11%
Thursday 70°F Mostly Cloudy 3 to 8 mph NNE 2%
Thursday Night 54°F Mostly Cloudy 2 to 8 mph NNE 6%
Friday 73°F Partly Sunny 2 to 8 mph NNE 5%
Friday Night 52°F Partly Cloudy 2 to 8 mph NE 3%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Dayton, IN

Last spring frost
Apr 20
First fall frost
Oct 20
Growing season
182 days
Hardiness zone
6a

Explore more for Dayton, IN: full frost dates · planting calendar · Indiana frost dates

Climate data from the nearest NOAA station, Lafayette 8 S, In (8.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.