Tomorrow | Weather | Joliet, Illinois

Active Weather Warnings
Wednesday, July 1, 2026
Cloudy Weather
Day 95°
Night 73°
Precipitation 3 %
Wind 10 mph
UV Index (0 - 11+) 10
Weather Forecast History
Last Year's Weather on This Day (July 1, 2025)
Cloudy Weather

Day

88°

Night

64°

Wind

8 mph

UV Index

10

Precipitation

1 %

Weather Alerts and Warnings for

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued June 30 at 2:24PM CDT until July 3 at 12:00AM CDT by NWS Chicago IL
Jun 30, 2:24 PM Jul 3, 12:00 AM
WHAT: Dangerously hot conditions with heat index values around
105 expected each afternoon.

WHERE: Portions of central, east central, north central, and
northeast Illinois and northwest Indiana.

WHEN: Until midnight CDT /1 AM EDT/ Thursday Night.

IMPACTS: Heat related illnesses increase significantly during
extreme heat and high humidity events.

ADDITIONAL DETAILS: Dangerous heat expected to persist through
Thursday. Thunderstorms may begin to bring some relief from the
heat for portions of northern Illinois by Thursday afternoon or
evening.
+ 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 30, 4:32 PM Source: NWS Alert
Moderate Expected Likely

Heat Advisory

Heat Advisory 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: Heat index values around 105 expected each afternoon

WHERE: Portions of central, east central, north central, and
northeast Illinois and northwest Indiana.

WHEN: Until 10 PM CDT /11 PM EDT/ Wednesday.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.
+ 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 30, 1:26 AM Source: NWS Alert