CHICAGOLAND DETAILS …
Radar is clear in northern Illinois at midnight Friday/Saturday.
Scattered showers and non-severe thunderstorms were expected through sunset this Friday evening, but no storms affected Arlington Heights and nearby communities.
Hot and humid conditions continue Saturday afternoon with highs reaching the low 90s.
Scattered thunderstorms are expected to develop along a cold front Saturday afternoon and evening, some of which could be strong to severe.
The Air Quality Index has dropped significantly in Arlington Heights to 55, which is a low moderate category. Wildfire smoke may return to the area in the wake of the cold front on Saturday and continue into Sunday.
See also: LIVE STREAMS: Arlingtoncardinal.com/StormChasers
Temperature Outlook …
SA 77 91 | SU 68 81 | M 69 88 | T 72 87
O’HARE FORECAST …
AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT SATURDAY/SUNDAY.
Overnight: Mostly clear, with a low around 77. West southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday: Showers and thunderstorms likely, mainly before 4pm. Some of the storms could produce heavy rainfall. Mostly sunny, with a high near 91. Heat index values as high as 98. West southwest wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night: Patchy smoke. Mostly clear, with a low around 68. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday: Areas of smoke before 8am. Sunny, with a high near 81. East northeast wind around 5 mph.
Sunday Night: Partly cloudy, with a low around 69. East wind around 5 mph becoming south southwest after midnight.
Monday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88.
Monday Night: Showers and thunderstorms likely before 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 72. Chance of precipitation is 70%.
Tuesday: Mostly sunny, with a high near 87.
Tuesday Night: Mostly clear, with a low around 64.
Wednesday: Sunny, with a high near 77.
Wednesday Night: Mostly clear, with a low around 62.
Thursday: Sunny, with a high near 82.
Thursday Night: Partly cloudy, with a low around 64.
RADAR • Clouds • Temps • NWS CHGO • UV
PHOENIX FORECAST …
Friday Night: A 30 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a steady temperature around 84. Calm wind becoming north northeast around 5 mph.
Saturday: A chance of showers and thunderstorms before 8am, then a slight chance of showers between 8am and 10am. Mostly cloudy, then gradually becoming sunny, with a high near 96. East northeast wind around 5 mph becoming west northwest in the afternoon. Chance of precipitation is 30%.
Saturday Night: A 30 percent chance of showers and thunderstorms, mainly between 2am and 3am. Partly cloudy, with a low around 82. Calm wind.
Sunday: A 10 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 99. Calm wind becoming northeast around 5 mph.
Sunday Night: A 10 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 83. Northwest wind around 5 mph becoming calm.
Monday: Mostly sunny, with a high near 101. South southeast wind around 5 mph becoming west in the afternoon.
Monday Night: A 30 percent chance of showers and thunderstorms, mainly after 11pm. Mostly cloudy, with a low around 83. West wind around 5 mph becoming calm.
Tuesday: A 30 percent chance of showers and thunderstorms before 11am. Mostly sunny, with a high near 102. South wind around 5 mph becoming west northwest in the afternoon.
Tuesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 84. South southwest wind around 5 mph becoming calm. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday: A 30 percent chance of showers and thunderstorms before 11am. Mostly sunny, with a high near 102. East wind around 5 mph becoming calm.
Wednesday Night: A 10 percent chance of showers and thunderstorms. Partly cloudy, with a low around 86. Calm wind.
Thursday: Sunny, with a high near 106. Calm wind becoming southwest around 5 mph.
Thursday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 86. Calm wind.
RADAR • Clouds • Temps • NWS Phoenix • UV
MIAMI FORECAST …
Overnight: Partly cloudy, with a low around 80. South wind around 5 mph.
Saturday: A 20 percent chance of showers and thunderstorms, mainly between 1pm and 2pm. Mostly sunny, with a high near 91. Heat index values as high as 105. South wind 6 to 11 mph.
Saturday Night: Partly cloudy, with a low around 81. South wind 6 to 8 mph.
Sunday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. Heat index values as high as 105. South wind 7 to 13 mph, with gusts as high as 18 mph.
Sunday Night: Partly cloudy, with a low around 81. South wind around 8 mph.
Monday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. South wind 8 to 13 mph, with gusts as high as 20 mph.
Monday Night: Partly cloudy, with a low around 81. Southeast wind 7 to 9 mph.
Tuesday: Sunny, with a high near 92. Southeast wind 9 to 11 mph.
Tuesday Night: Mostly clear, with a low around 81. Southeast wind 6 to 8 mph.
Wednesday: Sunny, with a high near 92.
Wednesday Night: Mostly clear, with a low around 81.
Thursday: Sunny, with a high near 92.
Thursday Night: Mostly clear, with a low around 81.
RADAR • Clouds • Temps • NWS Miami • UV
LAX FORECAST …
High Surf Advisory in effect from July 19, 05:00 PM PDT until July 21, 11:00 PM PDT
Saturday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 69. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday: Patchy fog before 11am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 77. Southeast wind 5 to 15 mph becoming west southwest in the afternoon.
Saturday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 67. West southwest wind 5 to 15 mph becoming south southeast after midnight.
Sunday: Patchy fog before 11am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 76. South southeast wind 5 to 15 mph becoming southwest in the afternoon.
Sunday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 67. West southwest wind 5 to 10 mph becoming south southeast after midnight.
Monday: Patchy fog before 11am. Otherwise, partly sunny, with a high near 77.
Monday Night: Partly cloudy, with a low around 68.
Tuesday: Mostly sunny, with a high near 77.
Tuesday Night: Partly cloudy, with a low around 68.
Wednesday: Mostly sunny, with a high near 78.
Wednesday Night: Mostly clear, with a low around 70.
Thursday: Mostly sunny, with a high near 80.
Thursday Night: Partly cloudy, with a low around 70.
RADAR • Clouds • Temps • NWS Los Angeles • UV
WASH DC FORECAST …
AIR QUALITY ALERT CONTINUES THROUGH SATURDAY JULY 18 2026…
Overnight: A slight chance of showers and thunderstorms after 2am. Widespread smoke. Mostly cloudy, with a low around 75. Calm wind. Chance of precipitation is 20%.
Saturday: Showers and thunderstorms likely, mainly after 3pm. Areas of smoke before noon. Mostly cloudy, with a high near 95. Heat index values as high as 105. Southwest wind 5 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night: Showers and thunderstorms likely before 2am, then a slight chance of showers between 2am and 3am. Mostly cloudy, with a low around 74. West wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday: Mostly sunny, with a high near 87. Northwest wind 6 to 8 mph.
Sunday Night: Mostly clear, with a low around 68. North wind around 5 mph becoming calm in the evening.
Monday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Chance of precipitation is 20%.
Monday Night: Partly cloudy, with a low around 71.
Tuesday: A chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 91. Chance of precipitation is 40%.
Tuesday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers likely after 2am. Mostly cloudy, with a low around 74. Chance of precipitation is 70%.
Wednesday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 50%.
Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Thursday: Mostly sunny, with a high near 85.
Thursday Night: Mostly clear, with a low around 67.
Baltimore/Washington DC Forecast
RADAR • Clouds • Temps • NWS Baltimore/Washington • UV
O’Hare Weather Forecast Compared to Phoenix, Miami, LA, Wash DC FRI JUL 17, 2026 11:56 PM SOURCE: National Weather Service local offices.
