Rensselaer, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rensselaer, a city in Jasper County, Indiana.
This Afternoon
67°F
Slight Chance Rain Showers
A slight chance of rain showers and a slight chance of drizzle. Mostly cloudy. High near 67, with temperatures falling to around 57 in the afternoon. West southwest wind around 15 mph, with gusts as high as 25 mph.
7-day forecast for Rensselaer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Slight Chance Rain Showers | 15 mph WSW | 1% |
| Tonight | 47°F | Slight Chance Rain Showers then Cloudy | 10 to 15 mph SW | 10% |
| Thursday | 57°F | Mostly Cloudy then Chance Rain | 5 to 15 mph SW | 27% |
| Thursday Night | 40°F | Rain | 5 mph WNW | 77% |
| Friday | 51°F | Mostly Cloudy | 10 mph NNW | 13% |
| Friday Night | 33°F | Partly Cloudy | 5 mph NW | 3% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph NW | 1% |
| Saturday Night | 30°F | Mostly Clear | 0 mph | 0% |
| Sunday | 58°F | Sunny | 0 to 10 mph W | 1% |
| Sunday Night | 32°F | Mostly Clear | 0 to 5 mph W | 0% |
| Monday | 62°F | Sunny | 0 to 5 mph WSW | 0% |
| Monday Night | 38°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Tuesday | 63°F | Sunny | 0 to 5 mph WNW | 0% |
| Tuesday Night | 36°F | Partly Cloudy | 0 mph | 2% |
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 Nov 4, 2026.