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O'Fallon, IL

51°F
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O'Fallon

Illinois

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

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January 7 - February 20

Wed 1/7

64° /44°
4%
Increasing amounts of clouds

RealFeel®41°

Cloud Cover60%

WindSSE 7 mph

Wind Gusts12 mph

Thu 1/8

66° /47°
75%
Cloudy and warm; breezy in the afternoon with periods of rain and a thunderstorm; thunderstorms can bring gusty winds, hail and localized flooding

RealFeel®59°

RealFeel Shade™59°

Max UV Index1.0 (Low)

WindSSE 13 mph

Fri 1/9

53° /39°
55%
A shower in the area early in the morning; low clouds and cooler

RealFeel®48°

RealFeel Shade™48°

Max UV Index1.0 (Low)

WindNW 9 mph

Sat 1/10

44° /24°
55%
A shower in spots in the morning; otherwise, low clouds, then perhaps some sun, breezy and cooler

RealFeel®34°

RealFeel Shade™34°

Max UV Index1.0 (Low)

WindWNW 15 mph

Sun 1/11

37° /24°
5%
Sunny to partly cloudy, breezy and chilly

RealFeel®28°

RealFeel Shade™26°

Max UV Index2.0 (Low)

WindWNW 15 mph

Mon 1/12

49° /32°
6%
Mostly sunny

RealFeel®45°

RealFeel Shade™43°

Max UV Index3.0 (Moderate)

WindSSW 9 mph

Tue 1/13

56° /36°
10%
Partly sunny

RealFeel®55°

RealFeel Shade™53°

Max UV Index3.0 (Moderate)

WindSW 9 mph

Wed 1/14

46° /26°
55%
Mostly cloudy and cooler; a couple of showers in the afternoon

RealFeel®41°

RealFeel Shade™41°

Max UV Index1.0 (Low)

WindNW 12 mph

Thu 1/15

37° /27°
2%
Turning cloudy

RealFeel®34°

RealFeel Shade™34°

Max UV Index2.0 (Low)

WindSW 7 mph

Fri 1/16

48° /30°
55%
A thick cloud cover; a shower in spots after temperatures rise above freezing in the morning, then a little rain in the afternoon

RealFeel®41°

RealFeel Shade™41°

Max UV Index1.0 (Low)

WindW 13 mph

Sat 1/17

40° /22°
85%
Considerable cloudiness and cooler; a mix of snow, sleet and rain in the morning followed by a shower in spots in the afternoon

RealFeel®29°

RealFeel Shade™29°

Max UV Index1.0 (Low)

WindN 12 mph

Sun 1/18

41° /24°
1%
Partly sunny

RealFeel®35°

RealFeel Shade™32°

Max UV Index2.0 (Low)

WindNW 12 mph

Mon 1/19

41° /26°
7%
Increasing cloudiness

RealFeel®33°

RealFeel Shade™33°

Max UV Index2.0 (Low)

WindS 12 mph

Tue 1/20

42° /23°
25%
Cloudy

RealFeel®45°

RealFeel Shade™45°

Max UV Index1.0 (Low)

WindSE 2 mph

Wed 1/21

47° /31°
25%
Cloudy

RealFeel®46°

RealFeel Shade™46°

Max UV Index1.0 (Low)

WindW 6 mph

Thu 1/22

42° /30°
20%
Plenty of sunshine

RealFeel®39°

RealFeel Shade™36°

Max UV Index3.0 (Moderate)

WindSSW 9 mph

Fri 1/23

50° /17°
10%
Mostly sunny

RealFeel®47°

RealFeel Shade™44°

Max UV Index3.0 (Moderate)

WindSW 12 mph

Sat 1/24

46° /15°
5%
Sunny

RealFeel®41°

RealFeel Shade™39°

Max UV Index3.0 (Moderate)

WindNW 12 mph

Sun 1/25

33° /19°
25%
Cloudy and colder

RealFeel®28°

RealFeel Shade™28°

Max UV Index1.0 (Low)

WindSE 6 mph

Mon 1/26

34° /16°
55%
Mainly cloudy with a little snow

RealFeel®33°

RealFeel Shade™33°

Max UV Index1.0 (Low)

WindNNW 6 mph

Tue 1/27

33° /15°
10%
Sunshine

RealFeel®38°

RealFeel Shade™31°

Max UV Index3.0 (Moderate)

WindSSE 4 mph

Wed 1/28

36° /31°
5%
Sunshine

RealFeel®29°

RealFeel Shade™28°

Max UV Index3.0 (Moderate)

WindS 10 mph

Thu 1/29

51° /33°
25%
Cloudy

RealFeel®45°

RealFeel Shade™45°

Max UV Index1.0 (Low)

WindSSW 12 mph

Fri 1/30

53° /19°
20%
After a cloudy start, sun returns

RealFeel®46°

RealFeel Shade™44°

Max UV Index3.0 (Moderate)

WindWNW 16 mph

Sat 1/31

34° /20°
20%
Colder with plenty of sunshine

RealFeel®39°

RealFeel Shade™36°

Max UV Index3.0 (Moderate)

WindN 6 mph

Sun 2/1

37° /31°
25%
After a cloudy start, sun returns

RealFeel®28°

RealFeel Shade™28°

Max UV Index1.0 (Low)

WindS 13 mph

Mon 2/2

50° /20°
20%
Sunshine and a few clouds

RealFeel®46°

RealFeel Shade™42°

Max UV Index3.0 (Moderate)

WindWNW 12 mph

Tue 2/3

38° /19°
5%
Colder with plenty of sunshine

RealFeel®41°

RealFeel Shade™35°

Max UV Index3.0 (Moderate)

WindESE 6 mph

Wed 2/4

40° /22°
25%
More clouds than sunshine

RealFeel®33°

RealFeel Shade™33°

Max UV Index2.0 (Low)

WindWNW 9 mph

Thu 2/5

37° /19°
10%
Mostly sunny

RealFeel®42°

RealFeel Shade™39°

Max UV Index3.0 (Moderate)

WindNNW 5 mph

Fri 2/6

36° /26°
25%
A thick cloud cover

RealFeel®31°

RealFeel Shade™31°

Max UV Index1.0 (Low)

WindE 8 mph

Sat 2/7

37° /18°
65%
Considerable cloudiness; a bit of snow in the morning followed by periods of snow and rain in the afternoon

RealFeel®30°

RealFeel Shade™30°

Max UV Index1.0 (Low)

WindN 8 mph

Sun 2/8

35° /17°
25%
Mostly cloudy

RealFeel®25°

RealFeel Shade™25°

Max UV Index1.0 (Low)

WindNW 14 mph

Mon 2/9

34° /16°
20%
Mostly sunny and cold

RealFeel®25°

RealFeel Shade™22°

Max UV Index3.0 (Moderate)

WindWNW 14 mph

Tue 2/10

35° /17°
5%
Sunny and cold

RealFeel®30°

RealFeel Shade™27°

Max UV Index3.0 (Moderate)

WindWNW 10 mph

Wed 2/11

38° /26°
25%
Clouds yielding to sun

RealFeel®43°

RealFeel Shade™40°

Max UV Index1.0 (Low)

WindN 2 mph

Thu 2/12

41° /22°
25%
Cloudy

RealFeel®42°

RealFeel Shade™42°

Max UV Index1.0 (Low)

WindNNE 5 mph

Fri 2/13

38° /20°
20%
Partly sunny

RealFeel®38°

RealFeel Shade™33°

Max UV Index3.0 (Moderate)

WindNNW 7 mph

Sat 2/14

37° /18°
20%
After a cloudy start, sunshine returns

RealFeel®40°

RealFeel Shade™34°

Max UV Index4.0 (Moderate)

WindNW 6 mph

Sun 2/15

39° /24°
20%
Plenty of sun

RealFeel®40°

RealFeel Shade™34°

Max UV Index4.0 (Moderate)

WindSW 6 mph

Mon 2/16

49° /24°
20%
Not as cold with sun and some clouds

RealFeel®49°

RealFeel Shade™45°

Max UV Index4.0 (Moderate)

WindNW 7 mph

Tue 2/17

40° /21°
10%
Sunny

RealFeel®48°

RealFeel Shade™41°

Max UV Index4.0 (Moderate)

WindN 4 mph

Wed 2/18

41° /29°
25%
Cloudy

RealFeel®42°

RealFeel Shade™42°

Max UV Index1.0 (Low)

WindSE 4 mph

Thu 2/19

42° /35°
25%
Cloudy

RealFeel®44°

RealFeel Shade™44°

Max UV Index1.0 (Low)

WindS 5 mph

Fri 2/20

42° /17°
75%
Remaining cloudy; a bit of snow in the morning followed by a mix of snow and rain in the afternoon

RealFeel®28°

RealFeel Shade™28°

Max UV Index1.0 (Low)

WindN 18 mph

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Weather Near O'Fallon:

  • O'Fallon, MO
  • St. Charles, MO
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