Rensselaer, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rensselaer, a city in Jasper County, Indiana.
Tonight
61°F
Partly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 61. East southeast wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Rensselaer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph ESE | 18% |
| Saturday | 80°F | Showers And Thunderstorms Likely | 5 to 10 mph SE | 68% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely | 5 mph SSW | 68% |
| Sunday | 75°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 68% |
| Sunday Night | 55°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 64% |
| Monday | 66°F | Showers And Thunderstorms Likely | 10 to 15 mph ENE | 62% |
| Monday Night | 50°F | Chance Rain Showers | 10 to 15 mph NE | 41% |
| Tuesday | 66°F | Slight Chance Rain Showers | 10 mph NE | 22% |
| Tuesday Night | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 22% |
| Wednesday | 68°F | Mostly Cloudy | 5 to 10 mph NNE | 6% |
| Wednesday Night | 51°F | Mostly Cloudy | 0 to 5 mph NNE | 6% |
| Thursday | 70°F | Partly Sunny | 5 mph NNE | 3% |
| Thursday Night | 52°F | Mostly Cloudy | 0 to 5 mph NNE | 3% |
| Friday | 72°F | Mostly Sunny | 0 to 5 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Rensselaer (40.940, -87.169). Updated through the day.
Growing snapshot for Rensselaer
Last spring frost
Apr 23
First fall frost
Oct 18
Growing season
177 days
Hardiness zone
6a
More local growing data for Rensselaer: nearby ZIP 47978 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Rensselaer, In (5.4 mi from Rensselaer). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.