Rensselaer, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rensselaer, a village in Marion County, Missouri.
Tonight
73°F
Partly Cloudy
Partly cloudy, with a low around 73. South wind around 7 mph.
7-day forecast for Rensselaer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 73°F | Partly Cloudy | 7 mph S | 7% |
| Saturday | 93°F | Partly Sunny | 6 to 9 mph SW | 6% |
| Saturday Night | 70°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SW | 34% |
| Sunday | 82°F | Showers And Thunderstorms Likely | 3 to 8 mph NW | 64% |
| Sunday Night | 63°F | Showers And Thunderstorms | 6 to 9 mph NE | 76% |
| Monday | 68°F | Showers And Thunderstorms | 6 to 9 mph NE | 76% |
| Monday Night | 57°F | Chance Showers And Thunderstorms | 9 mph NE | 48% |
| Tuesday | 65°F | Slight Chance Rain Showers then Mostly Cloudy | 9 mph NE | 19% |
| Tuesday Night | 51°F | Mostly Cloudy | 3 to 8 mph N | 5% |
| Wednesday | 68°F | Mostly Sunny | 6 mph N | 1% |
| Wednesday Night | 54°F | Partly Cloudy | 1 to 5 mph NE | 1% |
| Thursday | 70°F | Mostly Sunny | 5 mph NE | 6% |
| Thursday Night | 57°F | Partly Cloudy | 3 mph NE | 6% |
| Friday | 71°F | Mostly Sunny | 2 to 6 mph NE | 6% |
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 Sep 19, 2026.