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.
This Afternoon
96°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Sunny, with a high near 96. Heat index values as high as 106. Southeast wind around 2 mph. Chance of precipitation is 30%.
7-day forecast for St. Paul
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 96°F | Chance Showers And Thunderstorms | 2 mph SE | 26% |
| Tonight | 72°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 3 mph SE | 22% |
| Saturday | 96°F | Partly Sunny | 3 to 8 mph SW | 5% |
| Saturday Night | 72°F | Mostly Cloudy | 3 mph SW | 7% |
| Sunday | 90°F | Chance Rain Showers then Chance Showers And Thunderstorms | 5 mph W | 33% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 mph N | 68% |
| Monday | 77°F | Showers And Thunderstorms Likely | 6 to 9 mph N | 68% |
| Monday Night | 59°F | Showers And Thunderstorms Likely | 6 to 9 mph N | 62% |
| Tuesday | 70°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph N | 23% |
| Tuesday Night | 53°F | Mostly Cloudy | 5 to 8 mph N | 5% |
| Wednesday | 73°F | Mostly Sunny | 7 mph N | 0% |
| Wednesday Night | 54°F | Partly Cloudy | 2 to 6 mph N | 1% |
| Thursday | 75°F | Mostly Sunny | 2 to 6 mph N | 3% |
| Thursday Night | 57°F | Partly Cloudy | 5 mph NE | 3% |
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
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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 Sep 18, 2026.