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O'Fallon, MO

67°F
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O'Fallon

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O'Fallon, MO Weather
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February 18 - March 19

Wed 2/18

72° /43°
0%
Breezy this morning; otherwise, mostly sunny and warmer

RealFeel®73°

RealFeel Shade™69°

Max UV Index4.0 (Moderate)

WindWSW 10 mph

Thu 2/19

71° /31°
55%
Warm with variable cloudiness; an afternoon thunderstorm in spots; thunderstorms can bring hail and damaging winds

RealFeel®69°

RealFeel Shade™67°

Max UV Index2.0 (Low)

WindS 12 mph

Fri 2/20

44° /26°
5%
Partly sunny, windy and cooler

RealFeel®37°

RealFeel Shade™36°

Max UV Index4.0 (Moderate)

WindW 15 mph

Sat 2/21

43° /21°
12%
Times of clouds and sun

RealFeel®39°

RealFeel Shade™34°

Max UV Index4.0 (Moderate)

WindNW 9 mph

Sun 2/22

36° /18°
0%
Mostly sunny, windy and colder

RealFeel®23°

RealFeel Shade™20°

Max UV Index4.0 (Moderate)

WindNW 17 mph

Mon 2/23

39° /20°
1%
Mostly sunny and chilly

RealFeel®39°

RealFeel Shade™35°

Max UV Index4.0 (Moderate)

WindNNW 8 mph

Tue 2/24

52° /36°
11%
Breezy with clouds and sun

RealFeel®47°

RealFeel Shade™45°

Max UV Index2.0 (Low)

WindS 12 mph

Wed 2/25

60° /38°
55%
A couple of showers in the morning; otherwise, clouds and breaks of sun

RealFeel®61°

RealFeel Shade™57°

Max UV Index2.0 (Low)

WindSW 9 mph

Thu 2/26

56° /37°
0%
Mostly sunny

RealFeel®59°

RealFeel Shade™54°

Max UV Index4.0 (Moderate)

WindSSW 7 mph

Fri 2/27

53° /38°
4%
Sun and some clouds

RealFeel®52°

RealFeel Shade™48°

Max UV Index4.0 (Moderate)

WindSSW 10 mph

Sat 2/28

57° /37°
1%
Intervals of clouds and sunshine

RealFeel®60°

RealFeel Shade™55°

Max UV Index3.0 (Moderate)

WindSW 7 mph

Sun 3/1

55° /36°
0%
Sun through high clouds

RealFeel®52°

RealFeel Shade™50°

Max UV Index2.0 (Low)

WindS 8 mph

Mon 3/2

61° /36°
2%
Mostly cloudy

RealFeel®61°

RealFeel Shade™58°

Max UV Index3.0 (Moderate)

WindSW 10 mph

Tue 3/3

51° /28°
25%
Cooler with decreasing clouds

RealFeel®47°

RealFeel Shade™44°

Max UV Index4.0 (Moderate)

WindWNW 12 mph

Wed 3/4

59° /38°
25%
Clouds and sun

RealFeel®59°

RealFeel Shade™57°

Max UV Index3.0 (Moderate)

WindSW 8 mph

Thu 3/5

58° /39°
25%
Mostly cloudy

RealFeel®62°

RealFeel Shade™60°

Max UV Index4.0 (Moderate)

WindS 6 mph

Fri 3/6

60° /40°
25%
Rather cloudy

RealFeel®56°

RealFeel Shade™56°

Max UV Index2.0 (Low)

WindSSE 10 mph

Sat 3/7

57° /38°
77%
Cloudy; a passing morning shower, then afternoon rain

RealFeel®51°

RealFeel Shade™51°

Max UV Index1.0 (Low)

WindS 12 mph

Sun 3/8

58° /33°
60%
Considerable cloudiness; a little morning rain followed by a shower in spots in the afternoon

RealFeel®51°

RealFeel Shade™51°

Max UV Index1.0 (Low)

WindNNW 17 mph

Mon 3/9

49° /28°
5%
Plenty of sun

RealFeel®44°

RealFeel Shade™41°

Max UV Index5.0 (Moderate)

WindNNW 12 mph

Tue 3/10

45° /24°
20%
Mostly sunny

RealFeel®54°

RealFeel Shade™46°

Max UV Index5.0 (Moderate)

WindWSW 4 mph

Wed 3/11

54° /38°
20%
Partly sunny

RealFeel®53°

RealFeel Shade™50°

Max UV Index5.0 (Moderate)

WindSSE 8 mph

Thu 3/12

59° /41°
60%
A little morning rain; otherwise, clouds breaking for some sun

RealFeel®56°

RealFeel Shade™53°

Max UV Index5.0 (Moderate)

WindS 13 mph

Fri 3/13

58° /40°
62%
Rain

RealFeel®58°

RealFeel Shade™57°

Max UV Index1.0 (Low)

WindNE 6 mph

Sat 3/14

55° /39°
25%
Increasing amounts of sun

RealFeel®51°

RealFeel Shade™49°

Max UV Index2.0 (Low)

WindNNW 13 mph

Sun 3/15

55° /35°
20%
Plenty of sunshine

RealFeel®60°

RealFeel Shade™54°

Max UV Index5.0 (Moderate)

WindNNW 6 mph

Mon 3/16

60° /40°
25%
Cloudy

RealFeel®59°

RealFeel Shade™59°

Max UV Index1.0 (Low)

WindSSE 6 mph

Tue 3/17

61° /42°
25%
Considerable cloudiness

RealFeel®59°

RealFeel Shade™59°

Max UV Index1.0 (Low)

WindSSE 9 mph

Wed 3/18

62° /42°
10%
Brilliant sunshine

RealFeel®59°

RealFeel Shade™56°

Max UV Index5.0 (Moderate)

WindSSE 14 mph

Thu 3/19

63° /43°
55%
Considerable cloudiness with a touch of rain

RealFeel®55°

RealFeel Shade™55°

Max UV Index1.0 (Low)

WindSSE 18 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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