Portage, IN Weather & Growing Conditions
Tonight
60°F
Slight Chance Rain Showers then Chance Showers And Thunderstorms
A slight chance of rain showers between 10pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 60. East southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 60°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 10 mph ESE | 36% |
| Saturday | 76°F | Showers And Thunderstorms Likely | 5 to 10 mph SSE | 83% |
| Saturday Night | 65°F | Showers And Thunderstorms Likely | 5 mph S | 83% |
| Sunday | 69°F | Showers And Thunderstorms | 10 to 15 mph NNE | 83% |
| Sunday Night | 54°F | Rain Showers Likely | 10 to 15 mph NE | 63% |
| Monday | 65°F | Showers And Thunderstorms Likely | 10 to 15 mph ENE | 56% |
| Monday Night | 52°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph ENE | 33% |
| Tuesday | 64°F | Slight Chance Rain Showers | 10 mph NE | 17% |
| Tuesday Night | 53°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 17% |
| Wednesday | 66°F | Partly Sunny | 5 to 10 mph NNE | 14% |
| Wednesday Night | 54°F | Mostly Cloudy | 5 mph NE | 6% |
| Thursday | 67°F | Partly Sunny | 5 to 10 mph NNE | 4% |
| Thursday Night | 55°F | Mostly Cloudy | 0 to 5 mph NE | 5% |
| Friday | 70°F | Mostly Sunny | 0 to 5 mph NNE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portage, IN
Last spring frost
Apr 22
First fall frost
Oct 27
Growing season
188 days
Hardiness zone
6a
Explore more for Portage, IN: full frost dates · planting calendar · Indiana frost dates
Climate data from the nearest NOAA station, Indiana Dunes Nl, In (5.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.