Rensselaer, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rensselaer, a city in Jasper County, Indiana.
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. South wind 0 to 5 mph.
7-day forecast for Rensselaer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 0 to 5 mph S | 0% |
| Tonight | 60°F | Partly Cloudy | 0 mph | 0% |
| Wednesday | 83°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 16% |
| Wednesday Night | 64°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 5 mph SSW | 76% |
| Thursday | 80°F | Showers And Thunderstorms | 0 to 5 mph SSW | 76% |
| Thursday Night | 62°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph S | 58% |
| Friday | 81°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 mph | 16% |
| Friday Night | 62°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 16% |
| Saturday | 83°F | Mostly Sunny | 0 to 5 mph SSW | 11% |
| Saturday Night | 67°F | Partly Cloudy | 0 to 5 mph SSW | 11% |
| Sunday | 85°F | Mostly Sunny | 5 to 10 mph SW | 11% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 26% |
| Monday | 85°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 26% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 41% |
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 Aug 4, 2026.