St. Louis, MO Weather & Growing Conditions
Today
90°F
Sunny
Sunny, with a high near 90. South wind 1 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Sunny | 1 to 5 mph S | 0% |
| Tonight | 70°F | Mostly Clear | 2 to 6 mph SE | 0% |
| Wednesday | 91°F | Sunny | 2 to 6 mph S | 10% |
| Wednesday Night | 73°F | Slight Chance Showers And Thunderstorms | 7 mph S | 65% |
| Thursday | 88°F | Showers And Thunderstorms Likely | 6 mph S | 69% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 3 mph SE | 35% |
| Friday | 88°F | Chance Showers And Thunderstorms | 3 mph SW | 35% |
| Friday Night | 72°F | Chance Showers And Thunderstorms | 5 mph S | 32% |
| Saturday | 90°F | Chance Showers And Thunderstorms then Mostly Sunny | 5 mph S | 32% |
| Saturday Night | 74°F | Mostly Clear | 6 mph S | 7% |
| Sunday | 93°F | Sunny | 5 to 8 mph S | 6% |
| Sunday Night | 75°F | Mostly Clear | 8 mph S | 5% |
| Monday | 95°F | Sunny | 8 mph SW | 5% |
| Monday Night | 77°F | Slight Chance Showers And Thunderstorms | 9 mph S | 15% |
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 (2.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.