Heat Advisory

August 18 - October 1

Mon 8/18

97° /76°

Mostly sunny and hot

alerts

Heat Advisory

12:00 PM Friday - 8:00 PM Monday

RealFeel®110°

RealFeel Shade™102°

Max UV Index9.0 (Very High)

WindSSE 5 mph

Tue 8/19

93° /72°

55%

Sunny to partly cloudy and humid; a heavy thunderstorm in the afternoon; storms can bring flooding downpours and localized damaging wind gusts

RealFeel®106°

RealFeel Shade™98°

Max UV Index9.0 (Very High)

WindWSW 6 mph

Wed 8/20

84° /67°

80%

Periods of clouds and sun with a thunderstorm in spots; humid

RealFeel®93°

RealFeel Shade™87°

Max UV Index5.0 (Moderate)

WindNNE 7 mph

Thu 8/21

85° /65°

Humid with a blend of sun and clouds

RealFeel®94°

RealFeel Shade™86°

Max UV Index9.0 (Very High)

WindNNE 7 mph

Fri 8/22

85° /65°

Mostly sunny and humid

RealFeel®96°

RealFeel Shade™87°

Max UV Index8.0 (Very High)

WindNNE 5 mph

Sat 8/23

88° /64°

Humid with more sunshine than clouds

RealFeel®102°

RealFeel Shade™91°

Max UV Index8.0 (Very High)

WindNNE 4 mph

Sun 8/24

81° /57°

Mostly sunny and pleasant

RealFeel®88°

RealFeel Shade™80°

Max UV Index8.0 (Very High)

WindNNW 8 mph

Mon 8/25

82° /63°

Sun through high clouds and less humid

RealFeel®82°

RealFeel Shade™80°

Max UV Index4.0 (Moderate)

WindNNW 6 mph

Tue 8/26

83° /64°

Plenty of sunshine

RealFeel®90°

RealFeel Shade™81°

Max UV Index8.0 (Very High)

WindNNE 4 mph

Wed 8/27

86° /67°

Mostly cloudy in the morning followed by sun through high clouds

RealFeel®87°

RealFeel Shade™85°

Max UV Index5.0 (Moderate)

WindENE 4 mph

Thu 8/28

82° /65°

61%

Humid with periods of rain

RealFeel®82°

RealFeel Shade™81°

Max UV Index2.0 (Low)

WindSE 5 mph

Fri 8/29

83° /66°

55%

A thunderstorm in spots in the morning; otherwise, mostly cloudy and humid

RealFeel®95°

RealFeel Shade™94°

Max UV Index3.0 (Moderate)

WindESE 8 mph

Sat 8/30

83° /66°

80%

Overcast; morning rain followed by a couple of thunderstorms in the afternoon

RealFeel®85°

RealFeel Shade™81°

Max UV Index4.0 (Moderate)

WindSW 6 mph

Sun 8/31

85° /62°

10%

Mostly sunny

RealFeel®92°

RealFeel Shade™84°

Max UV Index8.0 (Very High)

WindW 2 mph

Mon 9/1

89° /68°

Brilliant sunshine and humid

RealFeel®99°

RealFeel Shade™92°

Max UV Index7.0 (High)

WindESE 4 mph

Tue 9/2

89° /67°

25%

Humid with clouds to start, then sunshine returns

RealFeel®101°

RealFeel Shade™93°

Max UV Index7.0 (High)

WindE 2 mph

Wed 9/3

88° /67°

64%

Partly sunny and humid; a couple of afternoon showers and a thunderstorm

RealFeel®100°

RealFeel Shade™93°

Max UV Index7.0 (High)

WindSW 4 mph

Thu 9/4

87° /66°

25%

Rather cloudy and humid

RealFeel®94°

RealFeel Shade™94°

Max UV Index2.0 (Low)

WindSW 4 mph

Fri 9/5

86° /66°

25%

Partly sunny and humid

RealFeel®96°

RealFeel Shade™90°

Max UV Index7.0 (High)

WindNE 4 mph

Sat 9/6

84° /65°

10%

Abundant sunshine and humid

RealFeel®96°

RealFeel Shade™88°

Max UV Index7.0 (High)

WindE 1 mph

Sun 9/7

87° /66°

40%

Humid with variable cloudiness; a thunderstorm in spots in the afternoon

RealFeel®90°

RealFeel Shade™90°

Max UV Index5.0 (Moderate)

WindS 5 mph

Mon 9/8

86° /65°

55%

A couple of morning showers; otherwise, mostly cloudy and humid

RealFeel®87°

RealFeel Shade™86°

Max UV Index2.0 (Low)

WindNNW 8 mph

Tue 9/9

82° /64°

25%

Turning cloudy and humid

RealFeel®85°

RealFeel Shade™84°

Max UV Index6.0 (High)

WindNNW 4 mph

Wed 9/10

85° /63°

20%

Mostly sunny and humid

RealFeel®92°

RealFeel Shade™87°

Max UV Index7.0 (High)

WindWSW 4 mph

Thu 9/11

85° /64°

Sunshine

RealFeel®91°

RealFeel Shade™85°

Max UV Index6.0 (High)

WindNNE 4 mph

Fri 9/12

85° /58°

Plenty of sunshine

RealFeel®90°

RealFeel Shade™85°

Max UV Index6.0 (High)

WindESE 4 mph

Sat 9/13

86° /60°

Plenty of sun

RealFeel®90°

RealFeel Shade™86°

Max UV Index6.0 (High)

WindSSE 4 mph

Sun 9/14

85° /60°

Plenty of sun

RealFeel®89°

RealFeel Shade™85°

Max UV Index6.0 (High)

WindSSE 4 mph

Mon 9/15

76° /52°

Not as warm with lower humidity with clouds to start, then sunshine returns

RealFeel®76°

RealFeel Shade™73°

Max UV Index6.0 (High)

WindN 13 mph

Tue 9/16

74° /57°

Sunny to partly cloudy

RealFeel®75°

RealFeel Shade™71°

Max UV Index6.0 (High)

WindNE 7 mph

Wed 9/17

75° /60°

Partly sunny

RealFeel®77°

RealFeel Shade™73°

Max UV Index6.0 (High)

WindESE 6 mph

Thu 9/18

74° /56°

63%

Humid with rain

RealFeel®74°

RealFeel Shade™74°

Max UV Index1.0 (Low)

WindSE 8 mph

Fri 9/19

82° /60°

39%

Partly sunny with widely separated thunderstorms

RealFeel®85°

RealFeel Shade™81°

Max UV Index5.0 (Moderate)

WindW 6 mph

Sat 9/20

77° /60°

25%

Partly sunny

RealFeel®79°

RealFeel Shade™76°

Max UV Index6.0 (High)

WindENE 6 mph

Sun 9/21

85° /61°

62%

Partly sunny with a couple of thunderstorms, especially late in the day

RealFeel®90°

RealFeel Shade™87°

Max UV Index5.0 (Moderate)

WindSSW 5 mph

Mon 9/22

85° /59°

25%

Humid with intervals of clouds and sunshine

RealFeel®92°

RealFeel Shade™88°

Max UV Index5.0 (Moderate)

WindESE 2 mph

Tue 9/23

82° /60°

55%

Partial sunshine with a couple of showers; humid

RealFeel®85°

RealFeel Shade™83°

Max UV Index5.0 (Moderate)

WindENE 8 mph

Wed 9/24

84° /59°

15%

Humid with intervals of clouds and sunshine

RealFeel®88°

RealFeel Shade™85°

Max UV Index5.0 (Moderate)

WindSSE 7 mph

Thu 9/25

81° /47°

40%

Humid with times of clouds and sun; a shower in the area in the afternoon

RealFeel®84°

RealFeel Shade™80°

Max UV Index5.0 (Moderate)

WindN 6 mph

Fri 9/26

73° /58°

Mostly sunny

RealFeel®76°

RealFeel Shade™72°

Max UV Index5.0 (Moderate)

WindENE 5 mph

Sat 9/27

78° /57°

Plenty of sunshine

RealFeel®81°

RealFeel Shade™76°

Max UV Index5.0 (Moderate)

WindS 5 mph

Sun 9/28

81° /59°

Mostly sunny

RealFeel®82°

RealFeel Shade™79°

Max UV Index5.0 (Moderate)

WindNW 6 mph

Mon 9/29

72° /48°

Sunshine and a few clouds

RealFeel®72°

RealFeel Shade™69°

Max UV Index5.0 (Moderate)

WindNNE 9 mph

Tue 9/30

71° /52°

Partly sunny

RealFeel®72°

RealFeel Shade™69°

Max UV Index5.0 (Moderate)

WindENE 7 mph

Wed 10/1

72° /50°

A blend of sun and clouds

RealFeel®74°

RealFeel Shade™70°

Max UV Index5.0 (Moderate)

WindENE 6 mph

Chester, IL

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