Berwyn, Illinois Weather:
Active Weather Warnings
Wednesday, July 1, 2026
Hot Day
Day 99°
Night 79°
Precipitation 5 %
Wind 12 mph
UV Index (0 - 11+) 10
Weather Forecast History
Last Year's Weather on This Day (July 1, 2025)

Day

88°

Night

72°

Weather Alerts and Warnings for

Severe Future Likely

Extreme Heat Watch

Extreme Heat Watch issued June 28 at 2:47AM CDT until July 1 at 10:00PM CDT by NWS Chicago IL
Jun 29, 12:00 PM Jul 1, 10:00 PM
WHAT: Dangerously hot conditions with heat index values around
105 possible each afternoon.

WHERE: Central Cook, Northern Cook, and Southern Cook Counties.

WHEN: From Monday afternoon through Wednesday evening.

IMPACTS: Heat related illnesses increase significantly during
extreme heat and high humidity events.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.
Updated: Jun 28, 10:38 AM Source: NWS Alert
Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued June 29 at 8:53PM CDT until July 1 at 10:00PM CDT by NWS Chicago IL
Jun 29, 8:53 PM Jul 1, 10:00 PM
WHAT: Dangerously hot conditions with heat index values around
105 expected each afternoon.

WHERE: Central Cook, Northern Cook, and Southern Cook Counties.

WHEN: Until 10 PM CDT Wednesday.

IMPACTS: Heat related illnesses increase significantly during
extreme heat and high humidity events.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. The magnitude of anticipated heat, combined with oppressive warmth at night will lead to hazardous conditions, particularly for the elderly and those with pre-existing health conditions. Residents of the city of Chicago can call 3 1 1 to request well being checks for elderly friends or family members, or for information on finding the nearest cooling center.
Updated: Jun 29, 11:29 PM Source: NWS Alert