CHICAGOLAND DETAILS …
Radar is clear in northern Illinois, eastern Iowa, southern Wisconsin and northwest Indiana.
Extreme Heat Warning for Cook County and a Heat Advisory for all other counties running from noon Monday through 10 PM CDT Wednesday evening.
Dangerous heat is expected across Chicagoland this week with afternoon heat index values forecasted over 100 degrees.
Little to no relief is expected at the lakeshore or at night, but the forecast highs have trended downward a little from 97 and 98 to 96 and 94.
A return to a more active pattern and thunderstorm chances is likely by the weekend.
See also: LIVE STREAMS: Arlingtoncardinal.com/StormChasers
Temperature Outlook …
T 78 96 | W 78 96 | R 79 94 | F 77 91
O’HARE FORECAST …
Monday Afternoon: Sunny, with a high near 92. Heat index values as high as 101. South southwest wind around 15 mph, with gusts as high as 25 mph.
Monday Night: Mostly clear, with a low around 78. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday: Partly sunny, then gradually becoming sunny and hot, with a high near 96. Heat index values as high as 107. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Tuesday Night: Mostly clear, with a low around 78. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday: Sunny and hot, with a high near 96. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night: Mostly clear, with a low around 79.
Thursday: Sunny, with a high near 94.
Thursday Night: A chance of showers after 1am. Partly cloudy, with a low around 77.
Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Friday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Independence Day (Saturday): Mostly sunny, with a high near 88.
Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 72.
RADAR • Clouds • Temps • NWS CHGO • UV
PHOENIX FORECAST …
Monday: Sunny, with a high near 102. Southwest wind 5 to 10 mph.
Monday Night: Clear, with a low around 76. West southwest wind 5 to 10 mph becoming light and variable after midnight.
Tuesday: Sunny, with a high near 101. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Tuesday Night: Clear, with a low around 75. West southwest wind 5 to 10 mph becoming light and variable in the evening.
Wednesday: Sunny, with a high near 100. Calm wind becoming southeast around 5 mph.
Wednesday Night: Clear, with a low around 75. West wind around 5 mph becoming calm.
Thursday: Sunny, with a high near 103. Calm wind becoming south southeast around 5 mph.
Thursday Night: Partly cloudy, with a low around 78. West wind around 5 mph becoming calm.
Friday: Partly sunny, with a high near 105. Calm wind becoming west around 5 mph in the afternoon.
Friday Night: Mostly cloudy, with a low around 82. West wind around 5 mph becoming calm in the evening.
Independence Day (Saturday): Mostly sunny, with a high near 106. Calm wind becoming west southwest around 5 mph in the afternoon.
Saturday Night: Partly cloudy, with a low around 83. West wind around 5 mph becoming calm in the evening.
RADAR • Clouds • Temps • NWS Phoenix • UV
MIAMI FORECAST …
Monday Afternoon: Sunny, with a high near 92. Heat index values as high as 105. East wind around 10 mph.
Monday Night: Mostly clear, with a low around 81. East wind 3 to 8 mph.
Tuesday: A 10 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 93. Heat index values as high as 105. Calm wind becoming east 5 to 9 mph in the afternoon.
Tuesday Night: A slight chance of showers and thunderstorms before midnight, then a chance of showers and thunderstorms after 2am. Mostly clear, with a low around 81. Southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%.
Wednesday: Showers and thunderstorms likely, mainly after 2pm. Sunny, with a high near 91. Calm wind becoming southeast 5 to 9 mph in the afternoon. Chance of precipitation is 70%.
Wednesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms, mainly between 8pm and 2am. Partly cloudy, with a low around 81. Light southeast wind. Chance of precipitation is 60%.
Thursday: Showers and thunderstorms likely, mainly after 2pm. Sunny, with a high near 91. Light southeast wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 70%.
Thursday Night: Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 82. Southeast wind around 6 mph. Chance of precipitation is 60%.
Friday: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 91. Light southeast wind increasing to 5 to 10 mph in the morning.
Friday Night: A 30 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 81.
Independence Day (Saturday): A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Saturday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 81.
RADAR • Clouds • Temps • NWS Miami • UV
LAX FORECAST …
Monday: Increasing clouds, with a high near 71. South southwest wind around 10 mph.
Monday Night: Cloudy, with a low around 62. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday: Cloudy, then gradually becoming mostly sunny, with a high near 69. South southeast wind 5 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night: Cloudy, with a low around 60. Southwest wind 5 to 10 mph becoming light south southwest in the evening.
Wednesday: Partly sunny, with a high near 69. Light and variable wind becoming west southwest 10 to 15 mph in the morning.
Wednesday Night: Cloudy, with a low around 59.
Thursday: Partly sunny, with a high near 70.
Thursday Night: Partly cloudy, with a low around 60.
Friday: Partly sunny, with a high near 72.
Friday Night: Mostly cloudy, with a low around 61.
Independence Day (Saturday): Mostly cloudy, with a high near 72.
Saturday Night: Mostly cloudy, with a low around 62.
RADAR • Clouds • Temps • NWS Los Angeles • UV
WASH DC FORECAST …
Monday Afternoon: Mostly sunny, with a high near 87. Light east wind.
Monday Night: Mostly clear, with a low around 67. South wind around 5 mph becoming calm in the evening.
Tuesday: Sunny, with a high near 90. Calm wind becoming south 5 to 8 mph in the afternoon.
Tuesday Night: Mostly clear, with a low around 71. South wind 5 to 7 mph.
Wednesday: Sunny and hot, with a high near 99. Southwest wind around 7 mph.
Wednesday Night: Mostly clear, with a low around 78.
Thursday: Sunny and hot, with a high near 103.
Thursday Night: Clear, with a low around 80.
Friday: A slight chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 103. Chance of precipitation is 20%.
Friday Night: A chance of showers and thunderstorms, mainly between 8pm and 2am. Partly cloudy, with a low around 80. Chance of precipitation is 30%.
Independence Day (Saturday): A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 101. Chance of precipitation is 40%.
Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 77. Chance of precipitation is 50%.
Baltimore/Washington DC Forecast
RADAR • Clouds • Temps • NWS Baltimore/Washington • UV
O’Hare Weather Forecast Compared to Phoenix, Miami, LA, Wash DC MON JUN 29, 2026 12:23 PM SOURCE: National Weather Service local offices.
