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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.