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El Nino to play a major role this hurricane season. Here's how many storms AccuWeather experts are predicting. Chevron right

O'Fallon, MO

46°F
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O'Fallon

Missouri

46°
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O'Fallon, MO Weather
Today WinterCast Local {stormName} Tracker Hourly Daily Radar MinuteCast® Monthly Air Quality Health & Activities

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March 28 - April 26

Sat 3/28

57° /39°
0%
Plenty of sun

RealFeel®60°

RealFeel Shade™53°

Max UV Index6.0 (High)

WindSE 7 mph

Sun 3/29

71° /56°
0%
Warmer with intervals of clouds and sunshine

RealFeel®68°

RealFeel Shade™67°

Max UV Index3.0 (Moderate)

WindSSW 12 mph

Mon 3/30

86° /64°
2%
Mostly sunny, windy and warmer

RealFeel®85°

RealFeel Shade™82°

Max UV Index6.0 (High)

WindSSW 16 mph

Tue 3/31

88° /46°
25%
Partly sunny, windy and remaining very warm

RealFeel®90°

RealFeel Shade™85°

Max UV Index6.0 (High)

WindW 16 mph

Wed 4/1

50° /47°
86%
Mostly cloudy and much colder with a couple of showers

RealFeel®49°

RealFeel Shade™45°

Max UV Index3.0 (Moderate)

WindNE 10 mph

Thu 4/2

55° /42°
91%
Periods of rain

RealFeel®48°

RealFeel Shade™48°

Max UV Index1.0 (Low)

WindENE 8 mph

Fri 4/3

66° /55°
57%
Occasional morning rain and drizzle; otherwise, mostly cloudy

RealFeel®67°

RealFeel Shade™63°

Max UV Index3.0 (Moderate)

WindESE 7 mph

Sat 4/4

70° /47°
61%
Cloudy with showers in the afternoon

RealFeel®69°

RealFeel Shade™67°

Max UV Index3.0 (Moderate)

WindS 14 mph

Sun 4/5

64° /41°
70%
Rain and a thunderstorm

RealFeel®64°

RealFeel Shade™61°

Max UV Index1.0 (Low)

WindNW 6 mph

Mon 4/6

60° /41°
55%
Rather cloudy with a shower in places

RealFeel®56°

RealFeel Shade™56°

Max UV Index2.0 (Low)

WindW 18 mph

Tue 4/7

58° /40°
0%
Plenty of sun

RealFeel®69°

RealFeel Shade™59°

Max UV Index7.0 (High)

WindNE 1 mph

Wed 4/8

62° /40°
12%
Sun followed by clouds

RealFeel®68°

RealFeel Shade™63°

Max UV Index6.0 (High)

WindS 2 mph

Thu 4/9

66° /41°
60%
Occasional rain

RealFeel®66°

RealFeel Shade™64°

Max UV Index2.0 (Low)

WindSSW 5 mph

Fri 4/10

65° /42°
25%
Cloudy

RealFeel®67°

RealFeel Shade™67°

Max UV Index2.0 (Low)

WindNNE 5 mph

Sat 4/11

70° /50°
20%
Mostly sunny

RealFeel®72°

RealFeel Shade™67°

Max UV Index7.0 (High)

WindSSW 12 mph

Sun 4/12

71° /49°
65%
Cloudy with a couple of showers and a thunderstorm in the afternoon

RealFeel®71°

RealFeel Shade™71°

Max UV Index2.0 (Low)

WindSSW 10 mph

Mon 4/13

69° /48°
25%
Cloudy and less humid

RealFeel®68°

RealFeel Shade™68°

Max UV Index2.0 (Low)

WindNNE 7 mph

Tue 4/14

65° /43°
20%
More sun than clouds

RealFeel®76°

RealFeel Shade™63°

Max UV Index8.0 (Very High)

WindWNW 5 mph

Wed 4/15

63° /37°
25%
Cloudy

RealFeel®66°

RealFeel Shade™65°

Max UV Index3.0 (Moderate)

WindNE 7 mph

Thu 4/16

57° /43°
75%
Cloudy with a couple of showers followed by a steadier rain

RealFeel®53°

RealFeel Shade™53°

Max UV Index2.0 (Low)

WindSE 8 mph

Fri 4/17

59° /48°
65%
Rain

RealFeel®56°

RealFeel Shade™56°

Max UV Index2.0 (Low)

WindE 9 mph

Sat 4/18

61° /48°
55%
A thick cloud cover with occasional rain

RealFeel®58°

RealFeel Shade™57°

Max UV Index2.0 (Low)

WindWNW 8 mph

Sun 4/19

62° /45°
78%
Considerable cloudiness with afternoon rain

RealFeel®61°

RealFeel Shade™56°

Max UV Index5.0 (Moderate)

WindSSE 8 mph

Mon 4/20

62° /43°
5%
Abundant sunshine

RealFeel®66°

RealFeel Shade™59°

Max UV Index8.0 (Very High)

WindWSW 8 mph

Tue 4/21

68° /44°
25%
Mostly cloudy

RealFeel®67°

RealFeel Shade™64°

Max UV Index2.0 (Low)

WindWNW 12 mph

Wed 4/22

62° /41°
5%
Plenty of sunshine

RealFeel®73°

RealFeel Shade™62°

Max UV Index8.0 (Very High)

WindWSW 4 mph

Thu 4/23

64° /49°
78%
Cloudy with a couple of showers followed by a steadier rain

RealFeel®58°

RealFeel Shade™58°

Max UV Index2.0 (Low)

WindSE 12 mph

Fri 4/24

71° /54°
25%
Cloudy

RealFeel®69°

RealFeel Shade™69°

Max UV Index3.0 (Moderate)

WindSSW 15 mph

Sat 4/25

73° /49°
65%
Partial sunshine with a couple of showers and a thunderstorm in the afternoon

RealFeel®80°

RealFeel Shade™72°

Max UV Index9.0 (Very High)

WindS 8 mph

Sun 4/26

74° /45°
25%
Less humid with sunshine and a few clouds

RealFeel®77°

RealFeel Shade™71°

Max UV Index9.0 (Very High)

WindW 10 mph

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World North America United States Missouri O'Fallon

Weather Near O'Fallon:

  • St. Charles, MO
  • St. Louis, MO
  • St. Peters, MO
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