Portland, IN Weather & Growing Conditions
Overnight
58°F
Mostly Cloudy
Mostly cloudy. Low around 58, with temperatures rising to around 63 overnight. East wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Mostly Cloudy | 5 mph E | 3% |
| Saturday | 82°F | Showers And Thunderstorms Likely | 5 mph SE | 60% |
| Saturday Night | 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% |
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.