Florissant, MO Weather Forecast
Local 7-day forecast
Patchy Smoke then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Florissant, MO in one place.
Patchy smoke before 11am. Mostly sunny, with a high near 93. Heat index values as high as 103. South wind around 3 mph.
Local Weather Overview
This forecast page for Florissant, MO is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 19, 2026 7:30 PM CDT.
The active forecast window currently covers Jul 20 to Jul 25, 2026 for Florissant, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 20 to Jul 25, 2026
- Latest sync
- Jul 19, 2026 7:30 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Florissant
Tuesday looks like the warmest upcoming period in Florissant at 95 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 65 degrees F.
The strongest winds are forecast for Tuesday at about 6 to 12 mph W.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 19, 2026 7:30 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 78. Heat index values as high as 105. Southwest wind 2 to 6 mph.
Mostly sunny, with a high near 95. West wind 6 to 12 mph.
Mostly clear, with a low around 71.
Sunny, with a high near 84.
Partly cloudy, with a low around 65.
Mostly sunny, with a high near 83.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 67. Chance of precipitation is 20%.
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 88. Chance of precipitation is 30%.
Partly cloudy, with a low around 72.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Jul 20
|
Patchy Smoke then Mostly Sunny
|
93°F |
3 mph
S
|
|
Monday Night
Jul 20
|
Mostly Clear
|
78°F |
2 to 6 mph
SW
|
|
Tuesday
Jul 21
|
Mostly Sunny
|
95°F |
6 to 12 mph
W
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
71°F |
7 to 12 mph
N
|
|
Wednesday
Jul 22
|
Sunny
|
84°F |
7 to 10 mph
N
|
|
Wednesday Night
Jul 22
|
Partly Cloudy
|
65°F |
3 to 10 mph
NE
|
|
Thursday
Jul 23
|
Mostly Sunny
|
83°F |
6 mph
E
|
|
Thursday Night
Jul 23
|
Partly Cloudy then Slight Chance Rain Showers
|
67°F |
3 to 7 mph
E
|
|
Friday
Jul 24
|
Chance Showers And Thunderstorms
|
82°F |
3 to 7 mph
E
|
|
Friday Night
Jul 24
|
Chance Showers And Thunderstorms
|
68°F |
7 mph
E
|
|
Saturday
Jul 25
|
Chance Showers And Thunderstorms
|
88°F |
5 to 8 mph
E
|
|
Saturday Night
Jul 25
|
Partly Cloudy
|
72°F |
3 to 7 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Florissant.
