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Alton, IL

63°F
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Alton

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63°
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Alton, IL Weather
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Winter Center
Today Hourly

Daily

 Radar MinuteCast Monthly Air Quality Health & Activities

June 6 - July 20

Fri 6/6

74° /64°
88%
Cloudy and humid with a couple of showers and a thunderstorm

RealFeel®76°

RealFeel Shade™73°

Max UV Index2 (Low)

WindSW 6 mph

Sat 6/7

76° /61°
78%
Variable clouds with a couple of showers and a thunderstorm, mainly later, humid; breezy in the afternoon; thunderstorms can bring hail and damaging winds

RealFeel®76°

RealFeel Shade™74°

Max UV Index3 (Moderate)

WindSE 10 mph

Sun 6/8

81° /59°
55%
Humid with variable cloudiness; a heavy thunderstorm in the afternoon; thunderstorms can bring hail and damaging winds

RealFeel®84°

RealFeel Shade™80°

Max UV Index10 (Very High)

WindW 10 mph

Mon 6/9

79° /55°
25%
Partly sunny

RealFeel®84°

RealFeel Shade™76°

Max UV Index11 (Extreme)

WindWSW 9 mph

Tue 6/10

78° /58°
1%
Hazy sun

RealFeel®86°

RealFeel Shade™75°

Max UV Index11 (Extreme)

WindNW 6 mph

Wed 6/11

79° /62°
1%
Partly sunny and pleasant

RealFeel®89°

RealFeel Shade™79°

Max UV Index8 (Very High)

WindWSW 2 mph

Thu 6/12

84° /64°
1%
Cloudy

RealFeel®87°

RealFeel Shade™83°

Max UV Index3 (Moderate)

WindSSE 5 mph

Fri 6/13

83° /68°
40%
A morning shower in places; otherwise, partly sunny and humid

RealFeel®93°

RealFeel Shade™87°

Max UV Index11 (Extreme)

WindS 5 mph

Sat 6/14

84° /68°
59%
Mostly cloudy and humid; occasional morning rain and a thunderstorm followed by a thunderstorm in spots in the afternoon

RealFeel®95°

RealFeel Shade™90°

Max UV Index5 (Moderate)

WindSSW 6 mph

Sun 6/15

85° /67°
40%
A blend of sun and clouds with a thunderstorm in parts of the area; humid

RealFeel®92°

RealFeel Shade™90°

Max UV Index11 (Extreme)

WindSW 8 mph

Mon 6/16

84° /65°
40%
Clouds and breaks of sun; very humid with a thunderstorm in parts of the area

RealFeel®96°

RealFeel Shade™91°

Max UV Index8 (Very High)

WindWNW 4 mph

Tue 6/17

84° /67°
40%
Considerable cloudiness with a thunderstorm in parts of the area; humid

RealFeel®95°

RealFeel Shade™91°

Max UV Index3 (Moderate)

WindS 1 mph

Wed 6/18

86° /68°
71%
Intervals of clouds and sunshine with a couple of thunderstorms, especially late; humid

RealFeel®95°

RealFeel Shade™89°

Max UV Index11 (Extreme)

WindSSE 5 mph

Thu 6/19

84° /66°
25%
Humid with times of clouds and sun

RealFeel®91°

RealFeel Shade™86°

Max UV Index8 (Very High)

WindNE 6 mph

Fri 6/20

82° /69°
10%
Mostly sunny and humid

RealFeel®91°

RealFeel Shade™85°

Max UV Index11 (Extreme)

WindE 6 mph

Sat 6/21

86° /70°
25%
Sunshine and humid

RealFeel®96°

RealFeel Shade™92°

Max UV Index11 (Extreme)

WindSSE 7 mph

Sun 6/22

88° /71°
20%
Partly sunny and uncomfortably humid

RealFeel®98°

RealFeel Shade™94°

Max UV Index8 (Very High)

WindSSW 7 mph

Mon 6/23

88° /71°
10%
Mostly sunny and uncomfortably humid

RealFeel®98°

RealFeel Shade™94°

Max UV Index11 (Extreme)

WindSSW 7 mph

Tue 6/24

87° /70°
20%
Mostly sunny and uncomfortably humid

RealFeel®95°

RealFeel Shade™91°

Max UV Index11 (Extreme)

WindSSW 10 mph

Wed 6/25

89° /71°
25%
Humid with increasing clouds

RealFeel®96°

RealFeel Shade™96°

Max UV Index6 (High)

WindSSW 8 mph

Thu 6/26

89° /72°
25%
Humid with periods of clouds and sunshine

RealFeel®96°

RealFeel Shade™93°

Max UV Index4 (Moderate)

WindSW 10 mph

Fri 6/27

90° /72°
5%
Hot and humid with plenty of sun

RealFeel®96°

RealFeel Shade™92°

Max UV Index11 (Extreme)

WindSSW 13 mph

Sat 6/28

90° /71°
65%
Humid with intervals of clouds and sunshine; a couple of afternoon showers and a thunderstorm

RealFeel®97°

RealFeel Shade™95°

Max UV Index11 (Extreme)

WindSSW 10 mph

Sun 6/29

89° /72°
25%
Cloudy and humid

RealFeel®95°

RealFeel Shade™94°

Max UV Index3 (Moderate)

WindW 9 mph

Mon 6/30

88° /71°
63%
Cloudy; a little morning rain followed by a couple of showers and a thunderstorm in the afternoon

RealFeel®91°

RealFeel Shade™89°

Max UV Index3 (Moderate)

WindWNW 5 mph

Tue 7/1

83° /68°
10%
Mostly sunny

RealFeel®90°

RealFeel Shade™81°

Max UV Index11 (Extreme)

WindNE 6 mph

Wed 7/2

84° /65°
10%
Mostly sunny

RealFeel®90°

RealFeel Shade™82°

Max UV Index11 (Extreme)

WindENE 6 mph

Thu 7/3

83° /66°
25%
Clouds to start, then sunshine returns

RealFeel®88°

RealFeel Shade™80°

Max UV Index11 (Extreme)

WindENE 6 mph

Fri 7/4

83° /65°
20%
Mostly cloudy

RealFeel®88°

RealFeel Shade™82°

Max UV Index11 (Extreme)

WindE 6 mph

Sat 7/5

87° /71°
20%
Partly sunny

RealFeel®95°

RealFeel Shade™89°

Max UV Index11 (Extreme)

WindS 5 mph

Sun 7/6

90° /71°
25%
Humid with partial sunshine

RealFeel®97°

RealFeel Shade™90°

Max UV Index11 (Extreme)

WindSSW 8 mph

Mon 7/7

90° /66°
20%
Sunshine and a few clouds

RealFeel®94°

RealFeel Shade™88°

Max UV Index11 (Extreme)

WindNNW 8 mph

Tue 7/8

83° /65°
5%
Plenty of sun

RealFeel®90°

RealFeel Shade™82°

Max UV Index11 (Extreme)

WindESE 6 mph

Wed 7/9

86° /71°
25%
Increasing cloudiness

RealFeel®87°

RealFeel Shade™87°

Max UV Index7 (High)

WindS 12 mph

Thu 7/10

91° /73°
64%
A couple of morning showers and a thunderstorm; otherwise, mostly cloudy and very humid

RealFeel®101°

RealFeel Shade™99°

Max UV Index6 (High)

WindSSW 5 mph

Fri 7/11

90° /72°
60%
Humid with times of clouds and sun; an afternoon shower

RealFeel®96°

RealFeel Shade™96°

Max UV Index10 (Very High)

WindESE 7 mph

Sat 7/12

90° /73°
20%
Sunny to partly cloudy and uncomfortably humid

RealFeel®101°

RealFeel Shade™98°

Max UV Index11 (Extreme)

WindSSE 9 mph

Sun 7/13

91° /74°
20%
Humid with plenty of sunshine

RealFeel®98°

RealFeel Shade™94°

Max UV Index11 (Extreme)

WindSSW 9 mph

Mon 7/14

92° /72°
10%
Abundant sunshine and hot

RealFeel®97°

RealFeel Shade™93°

Max UV Index11 (Extreme)

WindNNE 8 mph

Tue 7/15

89° /72°
58%
A blend of sun and clouds; a morning thunderstorm followed by a thundershower in the afternoon

RealFeel®98°

RealFeel Shade™95°

Max UV Index5 (Moderate)

WindNNE 4 mph

Wed 7/16

88° /71°
25%
Uncomfortably humid with considerable clouds

RealFeel®96°

RealFeel Shade™96°

Max UV Index3 (Moderate)

WindSW 4 mph

Thu 7/17

88° /71°
25%
Mostly sunny and uncomfortably humid

RealFeel®99°

RealFeel Shade™95°

Max UV Index11 (Extreme)

WindS 6 mph

Fri 7/18

90° /73°
1%
Sunshine and humid

RealFeel®100°

RealFeel Shade™97°

Max UV Index11 (Extreme)

WindSW 7 mph

Sat 7/19

91° /73°
1%
Mostly sunny and humid

RealFeel®103°

RealFeel Shade™100°

Max UV Index11 (Extreme)

WindSW 5 mph

Sun 7/20

91° /72°
25%
Low clouds and uncomfortably humid

RealFeel®101°

RealFeel Shade™100°

Max UV Index3 (Moderate)

WindSSW 5 mph

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World North America United States Illinois Alton

Weather Near Alton:

  • O'Fallon, MO
  • St. Charles, MO
  • St. Louis, MO
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