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Mount Vernon, IL

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Mount Vernon, IL Weather
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September 16 - September 30

Wed 9/16

100° /70°
55%
Partly sunny with the temperature breaking the record of 99 last reached in 1927; a thunderstorm around this afternoon; gusty winds can accompany any downpour
alerts

Heat Advisory

11:00 AM Tuesday - 7:00 PM Sunday

RealFeel®105°

RealFeel Shade™100°

Max UV Index6.0 (High)

WindSW 5 mph

Total Hours of Precipitation0.5

Total Hours of Rain0.5

Thu 9/17

100° /70°
55%
Partly sunny with a t-storm in spots; the temperature breaking the record of 99 last reached in 1927; caution advised if outside for extended periods of time
alerts

Heat Advisory

11:00 AM Tuesday - 7:00 PM Sunday

RealFeel®104°

RealFeel Shade™99°

Max UV Index6.0 (High)

WindW 6 mph

Total Hours of Precipitation1

Total Hours of Rain1

Fri 9/18

94° /69°
55%
Partly sunny and humid with the temperature near the record of 97 with a thunderstorm in spots; caution advised if outside for extended periods of time
alerts

Heat Advisory

11:00 AM Tuesday - 7:00 PM Sunday

RealFeel®104°

RealFeel Shade™98°

Max UV Index6.0 (High)

WindNE 6 mph

Total Hours of Precipitation1

Total Hours of Rain1

Sat 9/19

98° /67°
11%
Partly sunny and very hot with the temperature approaching the record high of 99 set in 1940; caution advised if outside for extended periods of time
alerts

Heat Advisory

11:00 AM Tuesday - 7:00 PM Sunday

RealFeel®101°

RealFeel Shade™96°

Max UV Index6.0 (High)

WindSW 7 mph

Sun 9/20

94° /70°
14%
Partly sunny and toasty conditions; danger of dehydration and heatstroke if outside for extended periods of time
alerts

Heat Advisory

11:00 AM Tuesday - 7:00 PM Sunday

RealFeel®99°

RealFeel Shade™93°

Max UV Index5.0 (Moderate)

WindSSW 5 mph

Mon 9/21

89° /68°
55%
Partly sunny and very warm with a thunderstorm

RealFeel®91°

RealFeel Shade™87°

Max UV Index5.0 (Moderate)

WindWSW 6 mph

Total Hours of Precipitation1

Total Hours of Rain1

Tue 9/22

84° /64°
13%
Wall-to-wall sunshine, warm and humid

RealFeel®90°

RealFeel Shade™83°

Max UV Index5.0 (Moderate)

WindNNW 5 mph

Wed 9/23

81° /58°
1%
Sunshine and a few clouds

RealFeel®84°

RealFeel Shade™79°

Max UV Index5.0 (Moderate)

WindNW 6 mph

Thu 9/24

79° /57°
3%
Sunshine interrupted by clouds at times

RealFeel®81°

RealFeel Shade™76°

Max UV Index4.0 (Moderate)

WindN 8 mph

Fri 9/25

79° /56°
73%
Mostly cloudy and warm; a couple of thunderstorms in the morning followed by rain and a thunderstorm in the afternoon

RealFeel®77°

RealFeel Shade™74°

Max UV Index2.0 (Low)

WindNE 7 mph

Total Hours of Precipitation6.5

Total Hours of Rain6.5

Sat 9/26

83° /57°
62%
Warm with periods of rain

RealFeel®82°

RealFeel Shade™81°

Max UV Index1.0 (Low)

WindE 5 mph

Total Hours of Precipitation4.5

Total Hours of Rain4.5

Sun 9/27

85° /56°
2%
Sunny to partly cloudy and very warm

RealFeel®89°

RealFeel Shade™83°

Max UV Index5.0 (Moderate)

WindESE 4 mph

Mon 9/28

86° /61°
0%
Mostly sunny and remaining very warm

RealFeel®90°

RealFeel Shade™84°

Max UV Index5.0 (Moderate)

WindENE 4 mph

Tue 9/29

75° /46°
25%
Mostly cloudy and not as warm

RealFeel®75°

RealFeel Shade™73°

Max UV Index2.0 (Low)

WindSE 9 mph

Wed 9/30

80° /59°
25%
Warm and less humid with a blend of sun and clouds

RealFeel®80°

RealFeel Shade™77°

Max UV Index4.0 (Moderate)

WindS 8 mph

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World North America United States Illinois Mount Vernon

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