O FALLON, MO 63366 Weather Forecast & Current Conditions

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SPIRIT OF ST. LOUIS, MO
Current Weather

10:54 AM CDT APR 4, 2026
Overcast
54°F
Feels Like: 51°F
Dewpoint: 48°F
Rel. Hum.: 80%
Visibility: 10 miles
Wind: WNW at 9 mph
Pressure: 30.03 inches
Last 72 hours

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O FALLON, MO 63366
Weather Forecast

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Snow Depth pages
REST OF TODAY
Mostly cloudy. A chance of showers late this morning. Much cooler with highs in the lower 60s. West winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent.
TONIGHT
Partly cloudy in the evening, then clearing. Much cooler with lows in the upper 30s. Northwest winds 10 to 15 mph with gusts up to 25 mph.
SUNDAY
Sunny. Highs in the upper 50s. Northwest winds 10 to 15 mph.
SUNDAY NIGHT
Clear. Lows around 40. West winds 5 to 10 mph.
MONDAY
Sunny. Highs in the lower 60s. Northwest winds 5 to 10 mph.
MONDAY NIGHT
Mostly cloudy. A slight chance of rain showers after midnight. Lows in the mid 30s. Chance of rain 20 percent.
TUESDAY AND TUESDAY NIGHT
Mostly cloudy. Highs in the lower 50s. Lows around 40.
WEDNESDAY AND WEDNESDAY NIGHT
Partly cloudy. Highs in the lower 70s. Lows in the lower 50s.
THURSDAY AND THURSDAY NIGHT
Partly cloudy. A 20 percent chance of showers. Highs in the mid 70s. Lows in the mid 50s.
FRIDAY
Partly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 70s. 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  5:00 PM MST  4/ 3/2026
Saturday
4 APR 2026
O FALLON, MO 63366 weather forecast Day 1, 0 hours 12 AM 71° 71° Mostly Cloudy 97%
RAIN
***
0% Thunder
( 40% severe)
S   12 68% 60°
Low 54° O FALLON, MO 63366 weather forecast Day 1, 3 hours 3 AM 65° 65° Mostly Cloudy SW   10 81% 59°
High 62° O FALLON, MO 63366 weather forecast Day 1, 6 hours 6 AM 61° 60° Mostly Cloudy 72%
RAIN
.1–.25 in
0% Thunder
( 6% severe)
W   9 81% 55°

Mostly Cloudy

Rain Likely

O FALLON, MO 63366 weather forecast Day 1, 9 hours 9 AM 55° 52° Mostly Cloudy WNW   12 74% 47°
O FALLON, MO 63366 weather forecast Day 1, 12 hours 12 PM 55° 52° Mostly Cloudy 9%

0% Thunder
( 1% severe)
WNW   13 64% 43°
O FALLON, MO 63366 weather forecast Day 1, 15 hours 3 PM 57° 54° Mostly Cloudy WNW   14 51% 39°
O FALLON, MO 63366 weather forecast Day 1, 18 hours 6 PM 53° 49° Partly Cloudy 0%

0% Thunder
( 1% severe)
WNW   13 50% 35°
O FALLON, MO 63366 weather forecast Day 1, 21 hours 9 PM 47° 43° Partly Cloudy WNW   9 58% 33°
Sunday
5 APR 2026
O FALLON, MO 63366 weather forecast Day 2, 0 hours 12 AM 44° 40° Partly Cloudy 0%

0% Thunder
( 1% severe)
WNW   7 62% 32°
Low 37° O FALLON, MO 63366 weather forecast Day 2, 3 hours 3 AM 41° 36° Partly Cloudy WNW   8 67% 31°
High 59° O FALLON, MO 63366 weather forecast Day 2, 6 hours 6 AM 39° 34° Partly Cloudy 0%

0% Thunder
( 0% severe)
WNW   7 73% 31°

Partly Cloudy



O FALLON, MO 63366 weather forecast Day 2, 9 hours 9 AM 46° 41° Partly Cloudy NW   10 56% 31°
O FALLON, MO 63366 weather forecast Day 2, 12 hours 12 PM 54° 51° Clear 0%

0% Thunder
( 0% severe)
NW   10 43% 32°
O FALLON, MO 63366 weather forecast Day 2, 15 hours 3 PM 58° 56° Clear NW   10 37% 32°
O FALLON, MO 63366 weather forecast Day 2, 18 hours 6 PM 55° 54° Clear 0%

0% Thunder
( 1% severe)
NW   5 43% 33°
O FALLON, MO 63366 weather forecast Day 2, 21 hours 9 PM 47° 46° Clear W   2 60% 34°

SPIRIT OF ST. LOUIS, MO extended weather forecast

Monday
6 APR 2026
Tuesday
7 APR 2026
Wednesday
8 APR 2026
Thursday
9 APR 2026
Friday
10 APR 2026
Low 38° Low 37° Low 37° Low 51° Low 52°
High 65° High 53° High 66° High 68° High 73°
O FALLON, MO 63366 weather forecast Day 3 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
Mostly Cloudy
19% Rain
Overcast
35% Rain/Snow
Mostly Cloudy
26% Rain
Overcast
45% Rain
Overcast
34% Rain
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