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O'Fallon, IL

78°F
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O'Fallon

Illinois

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O'Fallon, IL Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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July 9 - July 23

Thu 7/9

89° /72°
97%
Mostly cloudy and humid with a couple of showers and a heavy thunderstorm; thunderstorms can bring flooding downpours, hail and damaging wind gusts

RealFeel®71°

Cloud Cover93%

WindS 7 mph

Wind Gusts10 mph

Hours of Precipitation5

Hours of Rain5

Fri 7/10

89° /72°
99%
Mostly cloudy and very humid with a couple of showers and a heavy thunderstorm; storms can bring downpours, damaging winds and even an isolated tornado

RealFeel®100°

RealFeel Shade™95°

Max UV Index7.0 (High)

WindW 8 mph

Hours of Precipitation4

Hours of Rain4

Sat 7/11

83° /69°
55%
Cloudy with widely separated thunderstorms; humid

RealFeel®89°

RealFeel Shade™87°

Max UV Index3.0 (Moderate)

WindSSE 10 mph

Hours of Precipitation1

Hours of Rain1

Sun 7/12

86° /66°
4%
Mostly sunny and pleasant

RealFeel®97°

RealFeel Shade™88°

Max UV Index11.0 (Extreme)

WindENE 7 mph

Mon 7/13

90° /68°
5%
Mostly sunny

RealFeel®98°

RealFeel Shade™90°

Max UV Index11.0 (Extreme)

WindENE 8 mph

Tue 7/14

91° /70°
8%
Mostly sunny

RealFeel®104°

RealFeel Shade™95°

Max UV Index11.0 (Extreme)

WindNE 5 mph

Wed 7/15

91° /70°
10%
Sun and some clouds

RealFeel®105°

RealFeel Shade™96°

Max UV Index8.0 (Very High)

WindN 2 mph

Thu 7/16

93° /72°
1%
Plenty of sun

RealFeel®104°

RealFeel Shade™96°

Max UV Index11.0 (Extreme)

WindS 5 mph

Fri 7/17

92° /73°
3%
Sunny and humid

RealFeel®104°

RealFeel Shade™97°

Max UV Index11.0 (Extreme)

WindSW 8 mph

Sat 7/18

99° /71°
70%
Partly sunny and hot; a couple of afternoon thunderstorms

RealFeel®104°

RealFeel Shade™99°

Max UV Index11.0 (Extreme)

WindSW 10 mph

Hours of Precipitation2

Hours of Rain2

Sun 7/19

93° /71°
71%
Partly sunny; a couple of morning thunderstorms followed by a shower in spots in the afternoon

RealFeel®96°

RealFeel Shade™90°

Max UV Index5.0 (Moderate)

WindWSW 6 mph

Hours of Precipitation3.5

Hours of Rain3.5

Mon 7/20

96° /70°
5%
Partly sunny and hot

RealFeel®100°

RealFeel Shade™95°

Max UV Index11.0 (Extreme)

WindNE 6 mph

Tue 7/21

94° /69°
69%
Clouds breaking for some sun; periods of rain in the morning followed by a shower in spots in the afternoon

RealFeel®95°

RealFeel Shade™91°

Max UV Index7.0 (High)

WindE 9 mph

Hours of Precipitation2.5

Hours of Rain2.5

Wed 7/22

90° /68°
10%
Luminous sunshine

RealFeel®95°

RealFeel Shade™88°

Max UV Index10.0 (Very High)

WindNE 6 mph

Thu 7/23

88° /68°
10%
Mostly sunny

RealFeel®94°

RealFeel Shade™86°

Max UV Index10.0 (Very High)

WindNE 5 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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