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Sweltering 90-100 F heat to expand, affect 170 million in central and eastern US. Details here Chevron right
Severe storms sweep Northeast, teen struck by lightning in Central Park. Read more Chevron right

Markham, IL

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Winter Center
Today Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities
Monday, June 23

Day

6/23
97°Hi
RealFeel® 100°
Very Hot
RealFeel Guide
Very 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™ 96°
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
Blazing sunshine; breezy, very hot and humid; stay hydrated when outside in the heat
alerts

Extreme Heat Warning

10:00 AM Saturday - 12:00 AM Tuesday

Max UV Index11 (Extreme)

AccuLumen Brightness Index™9 (Very Bright)

WindSW 14 mph

Wind Gusts30 mph

Probability of Precipitation4%

Probability of Thunderstorms1%

Precipitation0.00 in

Cloud Cover10%

Morning

Afternoon

Night

6/23
75°Lo
RealFeel® 79°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
Mainly clear, warm and humid; little heat relief; uncomfortable night for sleeping without air conditioning
alerts

Extreme Heat Warning

10:00 AM Saturday - 12:00 AM Tuesday

WindSW 7 mph

Wind Gusts17 mph

Probability of Precipitation22%

Probability of Thunderstorms5%

Precipitation0.00 in

Cloud Cover21%

Evening

Overnight

Sun & Moon

15 hrs 11 mins
Rise 5:17 AM
Set 8:28 PM
Waning Crescent
Rise 3:05 AM
Set 7:13 PM

Temperature History

6/23
High
Low
Forecast
97°
75°
Average
82°
60°
Last Year
82°
63°

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Weather Near Markham:

  • Chicago, IL
  • Joliet, IL
  • Naperville, IL
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