St. Louis, MO Weather & Growing Conditions
Tonight
76°F
Partly Cloudy
Partly cloudy, with a low around 76. Southwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 76°F | Partly Cloudy | 6 mph SW | 1% |
| Sunday | 94°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 6 mph W | 22% |
| Sunday Night | 69°F | Showers And Thunderstorms Likely | 5 to 9 mph NE | 72% |
| Monday | 81°F | Showers And Thunderstorms Likely | 6 to 9 mph NE | 72% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 6 to 9 mph NE | 50% |
| Tuesday | 73°F | Slight Chance Rain Showers then Mostly Cloudy | 8 to 12 mph N | 20% |
| Tuesday Night | 57°F | Mostly Cloudy | 6 to 12 mph N | 1% |
| Wednesday | 74°F | Partly Sunny | 9 mph N | 0% |
| Wednesday Night | 57°F | Partly Cloudy | 3 to 8 mph N | 0% |
| Thursday | 76°F | Mostly Sunny | 6 mph N | 1% |
| Thursday Night | 61°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph NE | 15% |
| Friday | 79°F | Slight Chance Rain Showers | 6 mph NE | 18% |
| Friday Night | 61°F | Slight Chance Rain Showers then Mostly Cloudy | 6 mph NE | 18% |
| Saturday | 82°F | Mostly Sunny | 5 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Louis, MO
Last spring frost
Apr 1
First fall frost
Nov 4
Growing season
218 days
Hardiness zone
7a
Explore more for St. Louis, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, St Louis Sci Ctr, Mo (4.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.