Rensselaer, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rensselaer, a village in Marion County, Missouri.
Today
89°F
Sunny
Sunny, with a high near 89. South wind 3 to 7 mph.
7-day forecast for Rensselaer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Sunny | 3 to 7 mph S | 0% |
| Tonight | 71°F | Partly Cloudy | 5 mph S | 13% |
| Wednesday | 86°F | Mostly Sunny then Scattered Showers And Thunderstorms | 5 mph S | 50% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph NE | 91% |
| Thursday | 84°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 3 mph S | 91% |
| Thursday Night | 67°F | Partly Cloudy | 3 mph SE | 10% |
| Friday | 86°F | Mostly Sunny | 2 mph S | 10% |
| Friday Night | 69°F | Slight Chance Showers And Thunderstorms | 2 mph S | 24% |
| Saturday | 89°F | Slight Chance Showers And Thunderstorms then Sunny | 5 mph SW | 22% |
| Saturday Night | 73°F | Mostly Clear | 3 to 8 mph S | 7% |
| Sunday | 91°F | Sunny | 8 to 12 mph SW | 2% |
| Sunday Night | 74°F | Mostly Clear | 6 to 9 mph S | 7% |
| Monday | 92°F | Mostly Sunny | 8 to 12 mph SW | 8% |
| Monday Night | 75°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 9 mph S | 18% |
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 Aug 4, 2026.