Florissant, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Florissant, a city in St. Louis County, Missouri.
Overnight
68°F
Clear
Clear, with a low around 68. East wind around 5 mph.
7-day forecast for Florissant
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 68°F | Clear | 5 mph E | 0% |
| Tuesday | 90°F | Sunny | 5 mph S | 0% |
| Tuesday Night | 71°F | Mostly Clear | 6 mph SE | 0% |
| Wednesday | 91°F | Sunny | 6 mph S | 12% |
| Wednesday Night | 73°F | Chance Showers And Thunderstorms | 7 mph S | 71% |
| Thursday | 87°F | Showers And Thunderstorms Likely | 6 mph S | 71% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms | 5 mph SE | 27% |
| Friday | 88°F | Chance Showers And Thunderstorms | 5 mph SW | 27% |
| Friday Night | 72°F | Chance Showers And Thunderstorms | 5 mph S | 27% |
| Saturday | 90°F | Chance Showers And Thunderstorms then Mostly Sunny | 5 mph SW | 27% |
| Saturday Night | 74°F | Mostly Clear | 7 mph S | 6% |
| Sunday | 93°F | Sunny | 6 to 9 mph S | 6% |
| Sunday Night | 76°F | Mostly Clear | 8 mph S | 5% |
| Monday | 94°F | Mostly Sunny | 8 mph SW | 5% |
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
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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 Aug 4, 2026.