Rensselaer, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rensselaer, a city in Jasper County, Indiana.
Today
80°F
Showers And Thunderstorms
Showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Cloudy, with a high near 80. East southeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Rensselaer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Showers And Thunderstorms | 5 mph ESE | 93% |
| Tonight | 65°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 63% |
| Sunday | 74°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 10 mph N | 69% |
| Sunday Night | 54°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 47% |
| Monday | 66°F | Rain Showers Likely | 10 to 15 mph ENE | 56% |
| Monday Night | 49°F | Chance Rain Showers | 10 to 15 mph NE | 28% |
| Tuesday | 65°F | Slight Chance Rain Showers | 10 mph NE | 20% |
| Tuesday Night | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NNE | 20% |
| Wednesday | 66°F | Partly Sunny | 5 to 10 mph NNE | 7% |
| Wednesday Night | 51°F | Mostly Cloudy | 5 to 10 mph NNE | 6% |
| Thursday | 68°F | Partly Sunny | 5 to 10 mph NNE | 3% |
| Thursday Night | 51°F | Mostly Cloudy | 0 to 5 mph NNE | 3% |
| Friday | 72°F | Mostly Sunny | 5 mph NNE | 2% |
| Friday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 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 Sep 19, 2026.