Rensselaer, IN Weather & Growing Conditions
Today
66°F
Chance Rain then Slight Chance Rain Showers
A chance of rain before noon, then a slight chance of drizzle between noon and 2pm, then a slight chance of rain showers and a slight chance of drizzle. Partly sunny. High near 66, with temperatures falling to around 57 in the afternoon. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Chance Rain then Slight Chance Rain Showers | 10 to 15 mph SW | 40% |
| Tonight | 46°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph SW | 10% |
| Thursday | 57°F | Mostly Cloudy then Chance Rain | 5 to 15 mph SW | 28% |
| Thursday Night | 40°F | Rain | 5 to 10 mph WNW | 79% |
| Friday | 50°F | Partly Sunny | 10 mph NNW | 14% |
| Friday Night | 35°F | Partly Cloudy | 5 to 10 mph NW | 4% |
| Saturday | 52°F | Mostly Sunny | 5 mph NW | 2% |
| Saturday Night | 32°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 55°F | Sunny | 0 to 10 mph W | 5% |
| Sunday Night | 32°F | Mostly Clear | 0 to 5 mph W | 1% |
| Monday | 61°F | Sunny | 0 to 5 mph SW | 1% |
| Monday Night | 37°F | Mostly Clear | 5 mph WSW | 1% |
| Tuesday | 63°F | Sunny | 0 to 5 mph WNW | 1% |
| Tuesday Night | 37°F | Partly Cloudy | 0 mph | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rensselaer, IN
Last spring frost
Apr 23
First fall frost
Oct 18
Growing season
177 days
Hardiness zone
6a
Explore more for Rensselaer, IN: full frost dates · planting calendar · Indiana frost dates
Climate data from the nearest NOAA station, Rensselaer, In (5.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.