Portland, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portland, a city in Jay County, Indiana.
This Afternoon
69°F
Scattered Rain Showers
Scattered rain showers. Cloudy, with a high near 69. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
7-day forecast for Portland
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Scattered Rain Showers | 15 mph SW | 46% |
| Tonight | 47°F | Mostly Cloudy | 5 to 10 mph SW | 11% |
| Thursday | 61°F | Partly Sunny | 10 to 15 mph SW | 5% |
| Thursday Night | 43°F | Chance Rain Showers | 5 to 10 mph W | 34% |
| Friday | 54°F | Slight Chance Rain Showers | 5 to 10 mph NW | 23% |
| Friday Night | 34°F | Mostly Cloudy | 5 to 10 mph NW | 13% |
| Saturday | 53°F | Partly Sunny | 5 to 10 mph NW | 1% |
| Saturday Night | 30°F | Partly Cloudy | 0 to 5 mph W | 1% |
| Sunday | 57°F | Sunny | 0 to 10 mph W | 1% |
| Sunday Night | 32°F | Mostly Clear | 5 to 10 mph W | 1% |
| Monday | 61°F | Sunny | 5 to 10 mph W | 0% |
| Monday Night | 37°F | Clear | 5 mph SW | 0% |
| Tuesday | 63°F | Sunny | 5 to 10 mph W | 1% |
| Tuesday Night | 35°F | Mostly Clear | 0 to 5 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Portland (40.438, -84.983). Updated through the day.
Growing snapshot for Portland
Last spring frost
Apr 28
First fall frost
Oct 15
Growing season
171 days
Hardiness zone
6a
More local growing data for Portland: nearby ZIP 47371 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Portland 1 Sw, In (1.6 mi from Portland). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.