Florissant, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Florissant, a city in St. Louis County, Missouri.
This Afternoon
59°F
Mostly Cloudy
Mostly cloudy, with a high near 59. West wind 8 to 15 mph, with gusts as high as 23 mph.
7-day forecast for Florissant
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 59°F | Mostly Cloudy | 8 to 15 mph W | 0% |
| Tonight | 47°F | Partly Cloudy | 7 mph W | 0% |
| Thursday | 62°F | Mostly Sunny | 8 to 12 mph W | 9% |
| Thursday Night | 46°F | Isolated Rain Showers then Mostly Cloudy | 5 to 8 mph NW | 16% |
| Friday | 57°F | Partly Sunny | 8 to 12 mph N | 1% |
| Friday Night | 39°F | Partly Cloudy | 2 to 8 mph N | 0% |
| Saturday | 56°F | Mostly Sunny | 5 mph N | 0% |
| Saturday Night | 38°F | Partly Cloudy | 2 mph NW | 0% |
| Sunday | 61°F | Sunny | 2 to 6 mph NW | 1% |
| Sunday Night | 39°F | Clear | 3 mph W | 0% |
| Monday | 65°F | Sunny | 1 to 5 mph SW | 0% |
| Monday Night | 44°F | Clear | 3 mph SW | 0% |
| Tuesday | 68°F | Sunny | 5 mph W | 1% |
| Tuesday Night | 46°F | Mostly Clear | 2 mph N | 1% |
Forecast source: National Weather Service (api.weather.gov) for Florissant (38.800, -90.327). Updated through the day.
Growing snapshot for Florissant
Last spring frost
Apr 2
First fall frost
Nov 4
Growing season
215 days
Hardiness zone
7a
More local growing data for Florissant: nearby ZIP 63031 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Affton
Ballwin
Bel-Nor
Bel-Ridge
Bella Villa
Bellefontaine Neighbors
Bellerive Acres
Berkeley
Beverly Hills
Black Jack
Breckenridge Hills
Brentwood
Bridgeton
Calverton Park
Castle Point
Champ
Charlack
Chesterfield
Clarkson Valley
Clayton
Concord
Cool Valley
Country Club Hills
Country Life Acres
Crestwood
Creve Coeur
Crystal Lake Park
Dellwood
Des Peres
Edmundson
Climate data from the nearest NOAA station, St Louis Lambert Intl Ap, Mo (4.3 mi from Florissant). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.