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O'Fallon, IL

71°F
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O'Fallon

Illinois

71°
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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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Winter Center
Today Hourly

Daily

 Radar MinuteCast® Monthly Air Quality Health & Activities

August 6 - September 19

Wed 8/6

90° /69°
2%
Partly sunny

RealFeel®101°

RealFeel Shade™92°

Max UV Index10 (Very High)

WindSE 6 mph

Thu 8/7

92° /68°
1%
Plenty of sun

RealFeel®101°

RealFeel Shade™95°

Max UV Index9 (Very High)

WindS 7 mph

Fri 8/8

96° /70°
3%
Hot with plenty of sunshine; caution advised if outside for extended periods of time

RealFeel®105°

RealFeel Shade™98°

Max UV Index9 (Very High)

WindSSE 6 mph

Sat 8/9

94° /70°
3%
Sunshine

RealFeel®104°

RealFeel Shade™97°

Max UV Index9 (Very High)

WindSSE 7 mph

Sun 8/10

93° /70°
25%
Mostly sunny and humid

RealFeel®104°

RealFeel Shade™97°

Max UV Index9 (Very High)

WindSSE 7 mph

Mon 8/11

92° /73°
4%
Mostly sunny and humid

RealFeel®104°

RealFeel Shade™96°

Max UV Index9 (Very High)

WindS 6 mph

Tue 8/12

89° /68°
3%
Mostly sunny and humid

RealFeel®105°

RealFeel Shade™98°

Max UV Index9 (Very High)

WindS 6 mph

Wed 8/13

91° /67°
39%
Sunshine and a few clouds with a thunderstorm in spots

RealFeel®95°

RealFeel Shade™90°

Max UV Index8 (Very High)

WindS 6 mph

Thu 8/14

89° /68°
39%
Periods of clouds and sunshine with a thunderstorm in spots

RealFeel®93°

RealFeel Shade™88°

Max UV Index4 (Moderate)

WindSW 6 mph

Fri 8/15

90° /69°
1%
Mostly sunny and humid

RealFeel®105°

RealFeel Shade™97°

Max UV Index9 (Very High)

WindS 4 mph

Sat 8/16

89° /70°
40%
Mostly sunny and humid; a thunderstorm in parts of the area in the morning followed by a shower in spots in the afternoon

RealFeel®103°

RealFeel Shade™97°

Max UV Index8 (Very High)

WindNNW 2 mph

Sun 8/17

90° /68°
2%
Mostly sunny and humid

RealFeel®104°

RealFeel Shade™99°

Max UV Index9 (Very High)

WindENE 2 mph

Mon 8/18

89° /65°
25%
Humid with times of clouds and sun

RealFeel®101°

RealFeel Shade™95°

Max UV Index5 (Moderate)

WindSSW 4 mph

Tue 8/19

91° /69°
56%
A thunderstorm in the morning; otherwise, partly sunny and humid

RealFeel®103°

RealFeel Shade™98°

Max UV Index9 (Very High)

WindWSW 4 mph

Wed 8/20

90° /68°
10%
Sunshine and humid

RealFeel®101°

RealFeel Shade™91°

Max UV Index8 (Very High)

WindNW 5 mph

Thu 8/21

89° /65°
20%
Less humid with plenty of sunshine

RealFeel®94°

RealFeel Shade™87°

Max UV Index8 (Very High)

WindNNE 5 mph

Fri 8/22

88° /65°
20%
Plenty of sunshine

RealFeel®95°

RealFeel Shade™87°

Max UV Index8 (Very High)

WindENE 2 mph

Sat 8/23

89° /67°
10%
Sunny

RealFeel®96°

RealFeel Shade™89°

Max UV Index8 (Very High)

WindESE 2 mph

Sun 8/24

90° /68°
25%
Periods of clouds and sunshine

RealFeel®94°

RealFeel Shade™90°

Max UV Index5 (Moderate)

WindSE 4 mph

Mon 8/25

91° /68°
10%
Mostly sunny

RealFeel®95°

RealFeel Shade™90°

Max UV Index8 (Very High)

WindS 7 mph

Tue 8/26

90° /67°
40%
A thick cloud cover and humid; a thunderstorm in spots in the afternoon

RealFeel®94°

RealFeel Shade™94°

Max UV Index2 (Low)

WindSSW 6 mph

Wed 8/27

89° /66°
56%
A couple of showers in the morning; otherwise, humid with intervals of clouds and sunshine

RealFeel®95°

RealFeel Shade™94°

Max UV Index4 (Moderate)

WindNNW 1 mph

Thu 8/28

85° /67°
25%
Mostly sunny and humid

RealFeel®95°

RealFeel Shade™89°

Max UV Index8 (Very High)

WindNE 4 mph

Fri 8/29

86° /68°
25%
Cloudy and humid

RealFeel®90°

RealFeel Shade™90°

Max UV Index2 (Low)

WindENE 5 mph

Sat 8/30

88° /67°
10%
Sunny and humid

RealFeel®98°

RealFeel Shade™91°

Max UV Index7 (High)

WindENE 4 mph

Sun 8/31

90° /67°
10%
Mostly sunny and humid

RealFeel®100°

RealFeel Shade™94°

Max UV Index7 (High)

WindNE 1 mph

Mon 9/1

90° /66°
5%
Plenty of sunshine, hot and humid

RealFeel®100°

RealFeel Shade™94°

Max UV Index7 (High)

WindSE 4 mph

Tue 9/2

89° /67°
60%
A morning shower; otherwise, very warm and humid with clouds and sun

RealFeel®100°

RealFeel Shade™92°

Max UV Index7 (High)

WindENE 4 mph

Wed 9/3

89° /67°
61%
Partly sunny and humid; a couple of afternoon showers and a thunderstorm

RealFeel®101°

RealFeel Shade™94°

Max UV Index7 (High)

WindSW 4 mph

Thu 9/4

87° /66°
25%
Humid with clouds rolling in

RealFeel®95°

RealFeel Shade™95°

Max UV Index4 (Moderate)

WindSW 2 mph

Fri 9/5

88° /65°
25%
Humid with sun and some clouds

RealFeel®96°

RealFeel Shade™91°

Max UV Index7 (High)

WindENE 4 mph

Sat 9/6

87° /65°
5%
Humid with sunshine

RealFeel®97°

RealFeel Shade™89°

Max UV Index7 (High)

WindESE 2 mph

Sun 9/7

88° /64°
64%
Humid with more clouds than sun; a couple of afternoon showers and a thunderstorm

RealFeel®92°

RealFeel Shade™92°

Max UV Index3 (Moderate)

WindS 6 mph

Mon 9/8

87° /64°
25%
Humid with times of clouds and sun

RealFeel®87°

RealFeel Shade™86°

Max UV Index3 (Moderate)

WindNNW 9 mph

Tue 9/9

84° /63°
25%
Turning cloudy

RealFeel®85°

RealFeel Shade™85°

Max UV Index5 (Moderate)

WindNW 4 mph

Wed 9/10

85° /64°
20%
Mostly sunny and humid

RealFeel®93°

RealFeel Shade™87°

Max UV Index6 (High)

WindWNW 2 mph

Thu 9/11

86° /64°
5%
Humid with sunshine

RealFeel®92°

RealFeel Shade™87°

Max UV Index6 (High)

WindNE 4 mph

Fri 9/12

87° /59°
0%
Plenty of sunshine

RealFeel®92°

RealFeel Shade™88°

Max UV Index6 (High)

WindSE 2 mph

Sat 9/13

87° /60°
0%
Plenty of sunshine

RealFeel®91°

RealFeel Shade™88°

Max UV Index6 (High)

WindSSE 5 mph

Sun 9/14

85° /60°
0%
Sunny

RealFeel®89°

RealFeel Shade™86°

Max UV Index6 (High)

WindSSE 5 mph

Mon 9/15

77° /52°
0%
Partly sunny and not as warm with lower humidity

RealFeel®77°

RealFeel Shade™74°

Max UV Index6 (High)

WindN 12 mph

Tue 9/16

75° /53°
0%
Partly sunny

RealFeel®76°

RealFeel Shade™73°

Max UV Index6 (High)

WindENE 6 mph

Wed 9/17

77° /56°
2%
Sunshine and some clouds

RealFeel®78°

RealFeel Shade™75°

Max UV Index6 (High)

WindESE 7 mph

Thu 9/18

76° /57°
62%
Rain

RealFeel®76°

RealFeel Shade™76°

Max UV Index1 (Low)

WindSE 7 mph

Fri 9/19

75° /56°
2%
Mostly cloudy

RealFeel®75°

RealFeel Shade™72°

Max UV Index4 (Moderate)

WindNW 8 mph

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World North America United States Illinois O'Fallon

Weather Near O'Fallon:

  • O'Fallon, MO
  • St. Charles, MO
  • St. Louis, MO
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iPhone App Android App See all Apps & Downloads
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AccuWeather Premium AccuWeather Professional
More
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