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Boston, Philly hit 100, NYC breaks record from 1888 amid heat wave. Get the latest Chevron right
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Mark Twain, MO

83°F
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Mark Twain, MO Weather
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Winter Center
Today Hourly

Daily

 Radar MinuteCast Monthly Air Quality Health & Activities
Heat Advisory

June 25 - August 8

Wed 6/25

96° /77°
25%
Sunny to partly cloudy and hot; danger of dehydration and heatstroke if outside for extended periods of time
alerts

Heat Advisory

9:00 PM Monday - 9:00 PM Thursday

RealFeel®106°

RealFeel Shade™100°

Max UV Index11 (Extreme)

WindSW 7 mph

Thu 6/26

96° /76°
3%
Mostly sunny and hot; danger of dehydration and heatstroke if outside for extended periods of time
alerts

Heat Advisory

9:00 PM Monday - 9:00 PM Thursday

RealFeel®104°

RealFeel Shade™97°

Max UV Index11 (Extreme)

WindSW 8 mph

Fri 6/27

93° /75°
40%
Variable cloudiness with widely separated thunderstorms; hot; caution advised if doing strenuous activities outside

RealFeel®100°

RealFeel Shade™94°

Max UV Index9 (Very High)

WindWSW 8 mph

Sat 6/28

90° /74°
40%
Some sun, then turning cloudy with a thunderstorm in spots in the afternoon

RealFeel®100°

RealFeel Shade™94°

Max UV Index8 (Very High)

WindWSW 5 mph

Sun 6/29

90° /76°
49%
Times of clouds and sun with a thunderstorm in parts of the area in the afternoon

RealFeel®100°

RealFeel Shade™95°

Max UV Index7 (High)

WindW 2 mph

Mon 6/30

90° /73°
41%
Mostly cloudy and humid; a thunderstorm in parts of the area in the afternoon

RealFeel®102°

RealFeel Shade™95°

Max UV Index10 (Very High)

WindWSW 4 mph

Tue 7/1

85° /69°
40%
A shower in spots in the morning; otherwise, clouds and sun

RealFeel®93°

RealFeel Shade™84°

Max UV Index11 (Extreme)

WindNNW 6 mph

Wed 7/2

87° /70°
1%
Partial sunshine

RealFeel®95°

RealFeel Shade™86°

Max UV Index10 (Very High)

WindNNW 1 mph

Thu 7/3

87° /72°
2%
Sunny

RealFeel®94°

RealFeel Shade™86°

Max UV Index11 (Extreme)

WindS 4 mph

Fri 7/4

88° /73°
30%
Times of clouds and sun with a thunderstorm possible; humid

RealFeel®96°

RealFeel Shade™91°

Max UV Index11 (Extreme)

WindSSE 7 mph

Sat 7/5

87° /70°
56%
Mainly cloudy and humid; a little morning rain followed by a passing shower in the afternoon

RealFeel®99°

RealFeel Shade™96°

Max UV Index6 (High)

WindSSW 8 mph

Sun 7/6

87° /74°
2%
Mostly sunny and uncomfortably humid

RealFeel®98°

RealFeel Shade™94°

Max UV Index11 (Extreme)

WindW 4 mph

Mon 7/7

89° /71°
20%
Sunny to partly cloudy and uncomfortably humid

RealFeel®102°

RealFeel Shade™99°

Max UV Index11 (Extreme)

WindE 6 mph

Tue 7/8

86° /71°
5%
Sunny

RealFeel®94°

RealFeel Shade™88°

Max UV Index11 (Extreme)

WindSSE 5 mph

Wed 7/9

91° /75°
5%
Plenty of sunshine

RealFeel®99°

RealFeel Shade™96°

Max UV Index11 (Extreme)

WindS 7 mph

Thu 7/10

93° /75°
20%
Plenty of sunshine

RealFeel®102°

RealFeel Shade™98°

Max UV Index11 (Extreme)

WindSSW 6 mph

Fri 7/11

93° /76°
20%
Partly sunny

RealFeel®100°

RealFeel Shade™96°

Max UV Index7 (High)

WindSSW 7 mph

Sat 7/12

92° /76°
55%
Hot with partial sunshine; a passing thunderstorm in the afternoon

RealFeel®98°

RealFeel Shade™97°

Max UV Index11 (Extreme)

WindSW 8 mph

Sun 7/13

91° /75°
65%
Humid with a blend of sun and clouds; a couple of showers and a thunderstorm in the afternoon

RealFeel®98°

RealFeel Shade™97°

Max UV Index5 (Moderate)

WindNNW 5 mph

Mon 7/14

89° /75°
70%
Periods of rain in the morning; otherwise, mostly cloudy and humid

RealFeel®97°

RealFeel Shade™97°

Max UV Index5 (Moderate)

WindS 5 mph

Tue 7/15

86° /74°
63%
A couple of morning showers; otherwise, mainly cloudy and humid

RealFeel®94°

RealFeel Shade™93°

Max UV Index3 (Moderate)

WindSW 6 mph

Wed 7/16

87° /75°
63%
Cloudy most of the time with a couple of showers and a thunderstorm; humid

RealFeel®97°

RealFeel Shade™97°

Max UV Index3 (Moderate)

WindSW 2 mph

Thu 7/17

89° /75°
25%
Partly sunny and humid

RealFeel®99°

RealFeel Shade™96°

Max UV Index7 (High)

WindS 5 mph

Fri 7/18

90° /74°
25%
Mostly sunny and uncomfortably humid

RealFeel®102°

RealFeel Shade™99°

Max UV Index11 (Extreme)

WindS 2 mph

Sat 7/19

90° /74°
10%
Humid with brilliant sunshine

RealFeel®101°

RealFeel Shade™97°

Max UV Index11 (Extreme)

WindS 5 mph

Sun 7/20

92° /75°
20%
Humid with plenty of sunshine

RealFeel®101°

RealFeel Shade™98°

Max UV Index11 (Extreme)

WindS 8 mph

Mon 7/21

92° /76°
20%
Plenty of sunshine

RealFeel®101°

RealFeel Shade™97°

Max UV Index11 (Extreme)

WindSSW 7 mph

Tue 7/22

93° /75°
42%
Mostly cloudy and humid; a morning shower in spots followed by a thunderstorm in spots in the afternoon

RealFeel®101°

RealFeel Shade™100°

Max UV Index3 (Moderate)

WindNW 6 mph

Wed 7/23

89° /75°
70%
Mostly cloudy and humid; afternoon thunderstorms

RealFeel®97°

RealFeel Shade™96°

Max UV Index3 (Moderate)

WindSE 6 mph

Thu 7/24

88° /74°
10%
Mostly sunny and humid

RealFeel®97°

RealFeel Shade™94°

Max UV Index10 (Very High)

WindENE 7 mph

Fri 7/25

89° /71°
5%
Less humid with brilliant sunshine

RealFeel®94°

RealFeel Shade™88°

Max UV Index10 (Very High)

WindNE 8 mph

Sat 7/26

85° /68°
20%
Partly sunny

RealFeel®91°

RealFeel Shade™83°

Max UV Index10 (Very High)

WindNE 6 mph

Sun 7/27

85° /68°
5%
Plenty of sunshine

RealFeel®90°

RealFeel Shade™84°

Max UV Index10 (Very High)

WindNE 6 mph

Mon 7/28

86° /72°
10%
Mostly sunny

RealFeel®93°

RealFeel Shade™87°

Max UV Index10 (Very High)

WindNE 6 mph

Tue 7/29

89° /73°
5%
Plenty of sunshine

RealFeel®98°

RealFeel Shade™91°

Max UV Index10 (Very High)

WindNNE 2 mph

Wed 7/30

92° /74°
20%
Abundant sunshine

RealFeel®100°

RealFeel Shade™94°

Max UV Index10 (Very High)

WindSE 2 mph

Thu 7/31

92° /76°
5%
Sunny

RealFeel®99°

RealFeel Shade™93°

Max UV Index10 (Very High)

WindSSW 7 mph

Fri 8/1

94° /76°
10%
Mostly sunny and hot

RealFeel®99°

RealFeel Shade™95°

Max UV Index10 (Very High)

WindW 6 mph

Sat 8/2

93° /74°
25%
Increasing clouds

RealFeel®95°

RealFeel Shade™90°

Max UV Index10 (Very High)

WindENE 8 mph

Sun 8/3

88° /70°
25%
Less humid with a blend of sun and clouds

RealFeel®89°

RealFeel Shade™85°

Max UV Index5 (Moderate)

WindE 8 mph

Mon 8/4

88° /69°
0%
Brilliant sunshine

RealFeel®94°

RealFeel Shade™90°

Max UV Index10 (Very High)

WindNE 5 mph

Tue 8/5

88° /71°
0%
Plenty of sun

RealFeel®96°

RealFeel Shade™93°

Max UV Index10 (Very High)

WindE 1 mph

Wed 8/6

90° /71°
25%
Mostly sunny

RealFeel®97°

RealFeel Shade™94°

Max UV Index10 (Very High)

WindSW 6 mph

Thu 8/7

88° /70°
61%
Times of clouds and sun with a couple of showers and a thunderstorm, mainly early in the day

RealFeel®94°

RealFeel Shade™91°

Max UV Index9 (Very High)

WindNW 6 mph

Fri 8/8

85° /67°
64%
Times of clouds and sun with a couple of showers and a thunderstorm, mainly later

RealFeel®92°

RealFeel Shade™87°

Max UV Index8 (Very High)

WindNNE 5 mph

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World North America United States Missouri Mark Twain

Weather Near Mark Twain:

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