Florissant, MO Weather & Growing Conditions
This Afternoon
98°F
Partly Sunny
Partly sunny, with a high near 98. Heat index values as high as 100. West wind 5 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 98°F | Partly Sunny | 5 to 8 mph W | 5% |
| Tonight | 75°F | Partly Cloudy | 6 mph SW | 1% |
| Sunday | 93°F | Partly Sunny then Chance Showers And Thunderstorms | 3 to 8 mph W | 31% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 7 to 10 mph NE | 73% |
| Monday | 80°F | Showers And Thunderstorms Likely | 9 mph NE | 73% |
| Monday Night | 61°F | Chance Showers And Thunderstorms | 6 to 10 mph NE | 50% |
| Tuesday | 71°F | Slight Chance Rain Showers then Partly Sunny | 9 to 13 mph NE | 24% |
| Tuesday Night | 55°F | Mostly Cloudy | 6 to 13 mph N | 4% |
| Wednesday | 74°F | Mostly Sunny | 10 mph N | 1% |
| Wednesday Night | 57°F | Partly Cloudy | 3 to 9 mph N | 0% |
| Thursday | 77°F | Mostly Sunny | 5 to 8 mph N | 1% |
| Thursday Night | 59°F | Partly Cloudy | 3 to 8 mph NE | 3% |
| Friday | 78°F | Partly Sunny | 5 to 8 mph NE | 7% |
| Friday Night | 59°F | Partly Cloudy | 3 to 7 mph NE | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Florissant, MO
Last spring frost
Apr 2
First fall frost
Nov 4
Growing season
215 days
Hardiness zone
7a
Explore more for Florissant, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, St Louis Lambert Intl Ap, Mo (4.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.