Rensselaer, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rensselaer, a village in Marion County, Missouri.
Tonight
51°F
Chance Rain Showers
A chance of rain showers. Cloudy, with a low around 51. Southwest wind 8 to 13 mph, with gusts as high as 23 mph.
7-day forecast for Rensselaer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Chance Rain Showers | 8 to 13 mph SW | 12% |
| Wednesday | 58°F | Chance Rain Showers then Cloudy | 12 to 15 mph SW | 12% |
| Wednesday Night | 44°F | Partly Cloudy | 9 mph SW | 0% |
| Thursday | 59°F | Mostly Sunny | 8 to 12 mph W | 7% |
| Thursday Night | 43°F | Mostly Cloudy | 7 mph NW | 11% |
| Friday | 54°F | Partly Sunny | 6 to 9 mph N | 4% |
| Friday Night | 38°F | Partly Cloudy | 1 to 5 mph N | 2% |
| Saturday | 55°F | Partly Sunny | 3 mph NW | 1% |
| Saturday Night | 37°F | Mostly Clear | 0 to 3 mph W | 3% |
| Sunday | 61°F | Sunny | 3 to 7 mph W | 8% |
| Sunday Night | 38°F | Mostly Clear | 3 mph W | 2% |
| Monday | 65°F | Sunny | 3 to 9 mph SW | 2% |
| Monday Night | 43°F | Mostly Clear | 5 mph SW | 0% |
| Tuesday | 67°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Rensselaer (39.670, -91.540). Updated through the day.
Growing snapshot for Rensselaer
Last spring frost
Apr 10
First fall frost
Oct 27
Growing season
199 days
Hardiness zone
6a
More local growing data for Rensselaer: nearby ZIP 63401 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Hannibal Wtr Wks, Mo (5.4 mi from Rensselaer). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.