O FALLON, MO 63366 Weather Forecast & Current Conditions

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SPIRIT OF ST. LOUIS, MO
Current Weather

12:54 PM CDT SEP 11, 2025
Clear
88°F
Feels Like: 87°F
Dewpoint: 57°F
Rel. Hum.: 35%
Visibility: 10 miles
Wind: WNW at 3 mph
Pressure: 30.14 inches
Last 72 hours

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O FALLON, MO 63366
Weather Forecast

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Snow Depth pages
THIS AFTERNOON
Sunny. Near steady temperature in the upper 80s. Northeast winds around 5 mph.
TONIGHT
Mostly clear. Lows in the lower 60s. East winds around 5 mph.
FRIDAY
Sunny. Highs in the mid 90s. Southeast winds around 5 mph.
FRIDAY NIGHT
Mostly clear. Lows in the upper 60s. Southeast winds 5 to 10 mph.
SATURDAY
Sunny, hot with highs in the mid 90s. South winds around 5 mph.
SATURDAY NIGHT
Partly cloudy. Lows in the upper 60s.
SUNDAY
Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Chance of rain 20 percent.
SUNDAY NIGHT
Mostly cloudy. Lows in the upper 60s.
MONDAY
Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Chance of rain 20 percent.
MONDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 60s.
TUESDAY
Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 20 percent.
TUESDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s.
WEDNESDAY
Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent.

Visible Weather Satellite
O FALLON, MO 63366
Infrared Weather Satellite
O FALLON, MO 63366
NEXRAD Weather Radar
O FALLON, MO 63366

SPIRIT OF ST. LOUIS, MO 3 hourly weather forecast

weather forecast created  6:00 AM MDT  9/11/2025
Thursday
11 SEP 2025
O FALLON, MO 63366 weather forecast Day 1, 12 hours 1 PM 88° 87° Clear 1%

0% Thunder
( 9% severe)
N   2 38% 59°
High 90° O FALLON, MO 63366 weather forecast Day 1, 15 hours 4 PM 89° 88° Clear NNE   3 35% 58°
Clear



O FALLON, MO 63366 weather forecast Day 1, 18 hours 7 PM 83° 83° Clear 0%

0% Thunder
( 3% severe)
ENE   2 46% 60°
O FALLON, MO 63366 weather forecast Day 1, 21 hours 10 PM 72° 72° Clear ESE   2 68% 61°
Friday
12 SEP 2025
O FALLON, MO 63366 weather forecast Day 2, 0 hours 1 AM 68° 68° Partly Cloudy 0%

0% Thunder
( 2% severe)
SE   2 76% 60°
Low 62° O FALLON, MO 63366 weather forecast Day 2, 3 hours 4 AM 65° 65° Partly Cloudy SE   3 84% 60°
High 93° O FALLON, MO 63366 weather forecast Day 2, 6 hours 7 AM 63° 64° Clear 0%

0% Thunder
( 2% severe)
ESE   2 87% 59°

Clear



O FALLON, MO 63366 weather forecast Day 2, 9 hours 10 AM 80° 81° Clear SSE   5 56% 63°
O FALLON, MO 63366 weather forecast Day 2, 12 hours 1 PM 89° 89° Partly Cloudy 1%

0% Thunder
( 10% severe)
SSE   6 38% 60°
O FALLON, MO 63366 weather forecast Day 2, 15 hours 4 PM 91° 90° Clear SE   6 34% 59°
O FALLON, MO 63366 weather forecast Day 2, 18 hours 7 PM 85° 85° Partly Cloudy 0%

0% Thunder
( 8% severe)
SE   5 45% 61°
O FALLON, MO 63366 weather forecast Day 2, 21 hours 10 PM 75° 75° Partly Cloudy SE   5 62% 61°
Saturday
13 SEP 2025
O FALLON, MO 63366 weather forecast Day 3, 0 hours 1 AM 72° 72° Partly Cloudy 1%

0% Thunder
( 5% severe)
SSE   5 64% 59°
Low 66° O FALLON, MO 63366 weather forecast Day 3, 3 hours 4 AM 69° 69° Partly Cloudy S   5 70% 59°
High 95° O FALLON, MO 63366 weather forecast Day 3, 6 hours 7 AM 67° 67° Partly Cloudy 4%

0% Thunder
( 4% severe)
S   3 73% 58°

Partly Cloudy



O FALLON, MO 63366 weather forecast Day 3, 9 hours 10 AM 82° 83° Clear SSW   6 51% 62°
O FALLON, MO 63366 weather forecast Day 3, 15 hours 1 PM 91° 91° Partly Cloudy 1%

0% Thunder
( 15% severe)
SW   6 38% 62°
O FALLON, MO 63366 weather forecast Day 3, 18 hours 4 PM 93° 93° Partly Cloudy SSW   6 35% 61°
O FALLON, MO 63366 weather forecast Day 3, 21 hours 7 PM 87° 88° Partly Cloudy     S   3 46% 64°

SPIRIT OF ST. LOUIS, MO extended weather forecast

Sunday
14 SEP 2025
Monday
15 SEP 2025
Tuesday
16 SEP 2025
Wednesday
17 SEP 2025
Thursday
18 SEP 2025
Low 65° Low 63° Low 62° Low 62° Low 61°
High 97° High 92° High 92° High 87° High 86°
O FALLON, MO 63366 weather forecast Day 4 O FALLON, MO 63366 weather forecast Day 5 O FALLON, MO 63366 weather forecast Day 6 O FALLON, MO 63366 weather forecast Day 7 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Partly Cloudy
21% Rain
Partly Cloudy
18% Rain
Partly Cloudy
18% Rain
Partly Cloudy
21% Rain
Partly Cloudy
30% Rain
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