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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

81°F
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Winter Center
Today Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities
Wednesday, June 25

Current Weather

5:49 AM

81°F
Partly sunny
RealFeel® 91°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
RealFeel Shade™ 91°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
RealFeel®
91°
RealFeel Shade™
91°
Max UV Index
0 Low
Wind
SW 1 mph
Wind Gusts
3 mph
Humidity
84%
Indoor Humidity
84% (Extremely Humid)
Dew Point
76° F
Pressure
↔ 30.09 in
Cloud Cover
33%
Visibility
10 mi
Cloud Ceiling
40000 ft

Day

6/25
95°Hi
RealFeel® 106°
Very Hot
RealFeel Guide
Very Hot
101° to 107°
Caution advised. Danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
RealFeel Shade™ 99°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
Sunny to partly cloudy and hot; a thunderstorm in spots this afternoon; danger of dehydration and heatstroke if outside for extended periods of time
alerts

Heat Advisory

9:00 PM Monday - 9:00 PM Thursday

Max UV Index11 (Extreme)

AccuLumen Brightness Index™9 (Very Bright)

WindSSW 7 mph

Wind Gusts14 mph

Probability of Precipitation40%

Probability of Thunderstorms24%

Precipitation0.04 in

Rain0.04 in

Hours of Precipitation0.5

Hours of Rain0.5

Cloud Cover26%

Morning

Afternoon

Night

6/25
76°Lo
RealFeel® 82°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
Clear, warm and very humid
alerts

Heat Advisory

9:00 PM Monday - 9:00 PM Thursday

WindSSW 6 mph

Wind Gusts9 mph

Probability of Precipitation25%

Probability of Thunderstorms6%

Precipitation0.00 in

Cloud Cover8%

Evening

Overnight

Sun & Moon

14 hrs 53 mins
Rise 5:37 AM
Set 8:30 PM
New Moon
Rise 5:23 AM
Set 9:22 PM

Temperature History

6/25
High
Low
Forecast
95°
76°
Average
88°
70°
Last Year
103°
75°
Record
103°
2024
50°
1974

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Weather Near Mark Twain:

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