St. Paul, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Paul, a city in St. Charles County, Missouri.
Tonight
51°F
Light Rain Likely
Rain likely before 3am, then a chance of rain showers between 3am and 5am. Cloudy, with a low around 51. Southwest wind 7 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
7-day forecast for St. Paul
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Light Rain Likely | 7 to 13 mph SW | 69% |
| Wednesday | 62°F | Mostly Cloudy | 8 to 15 mph W | 5% |
| Wednesday Night | 41°F | Partly Cloudy | 6 mph SW | 0% |
| Thursday | 64°F | Sunny | 6 to 12 mph W | 4% |
| Thursday Night | 41°F | Mostly Cloudy | 6 mph NW | 10% |
| Friday | 57°F | Mostly Cloudy | 6 to 9 mph NW | 3% |
| Friday Night | 36°F | Mostly Cloudy | 1 to 5 mph N | 1% |
| Saturday | 56°F | Partly Sunny | 3 mph NW | 0% |
| Saturday Night | 34°F | Partly Cloudy | 2 mph W | 1% |
| Sunday | 62°F | Sunny | 2 to 6 mph W | 8% |
| Sunday Night | 35°F | Mostly Clear | 3 mph W | 3% |
| Monday | 67°F | Sunny | 2 to 7 mph SW | 2% |
| Monday Night | 39°F | Mostly Clear | 5 mph SW | 1% |
| Tuesday | 69°F | Sunny | 5 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for St. Paul (38.849, -90.741). Updated through the day.
Growing snapshot for St. Paul
Last spring frost
Apr 9
First fall frost
Oct 26
Growing season
198 days
Hardiness zone
6b
More local growing data for St. Paul: nearby ZIP 63366 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Augusta
Cottleville
Dardenne Prairie
Defiance
Flint Hill
Foristell
Josephville
Lake St. Louis
New Melle
O'Fallon
St. Peters
Weldon Spring
Weldon Spring Heights
Wentzville
West Alton
Climate data from the nearest NOAA station, St Peters 2 Se, Mo (9.6 mi from St. Paul). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.