Harman US

Portland, IN Weather & Growing Conditions

Today
79°F
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
A slight chance of showers and thunderstorms before 11am, then showers and thunderstorms likely between 11am and 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 79. Southeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Today 79°F Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 5 to 10 mph SE 60%
Tonight 67°F Chance Showers And Thunderstorms 5 mph S 49%
Sunday 79°F Chance Showers And Thunderstorms 5 to 10 mph NW 62%
Sunday Night 55°F Showers And Thunderstorms Likely 10 to 15 mph NE 61%
Monday 67°F Chance Rain Showers 10 to 15 mph NE 53%
Monday Night 51°F Chance Rain Showers 10 to 15 mph NE 46%
Tuesday 66°F Slight Chance Rain Showers 10 to 15 mph NE 19%
Tuesday Night 53°F Chance Showers And Thunderstorms 5 to 15 mph NE 34%
Wednesday 67°F Chance Rain Showers 5 to 10 mph NE 34%
Wednesday Night 53°F Chance Rain Showers then Mostly Cloudy 5 to 10 mph NE 29%
Thursday 69°F Mostly Cloudy 5 to 10 mph NE 10%
Thursday Night 52°F Mostly Cloudy 5 to 10 mph NE 8%
Friday 70°F Mostly Sunny 5 to 10 mph NE 6%
Friday Night 50°F Partly Cloudy 5 to 10 mph NE 6%

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

Growing snapshot for Portland, IN

Last spring frost
Apr 28
First fall frost
Oct 15
Growing season
171 days
Hardiness zone
6a

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

Climate data from the nearest NOAA station, Portland 1 Sw, In (1.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.