Tomorrow Hourly Weather Forecast for Naperville, IL

Hourly Weather | Tomorrow › Tuesday, June 30, 2026

Active Weather Warnings

Heat Advisory

Naperville, Illinois

12 AM

81°

Feels Like 88°

Humidity: 89%

UV Index: 0

Wind: 8 mph

1 AM

79°

Feels Like 88°

Humidity: 91%

UV Index: 0

Wind: 7 mph

2 AM

79°

Feels Like 88°

Humidity: 93%

UV Index: 0

Wind: 7 mph

3 AM

77°

Feels Like 86°

Humidity: 95%

UV Index: 0

Wind: 7 mph

4 AM

77°

Feels Like 84°

Humidity: 96%

UV Index: 0

Wind: 7 mph

5 AM

75°

Feels Like 82°

Humidity: 100%

UV Index: 0

Wind: 7 mph

6 AM

75°

Feels Like 84°

Humidity: 97%

UV Index: 0

Wind: 8 mph

7 AM

77°

Feels Like 84°

Humidity: 92%

UV Index: 1

Wind: 9 mph

8 AM

81°

Feels Like 88°

Humidity: 84%

UV Index: 2

Wind: 10 mph

9 AM

82°

Feels Like 91°

Humidity: 77%

UV Index: 3

Wind: 13 mph

10 AM

84°

Feels Like 95°

Humidity: 72%

UV Index: 5

Wind: 14 mph

11 AM

88°

Feels Like 99°

Humidity: 67%

UV Index: 7

Wind: 15 mph

12 PM

90°

Feels Like 100°

Humidity: 63%

UV Index: 8

Wind: 15 mph

1 PM

91°

Feels Like 102°

Humidity: 60%

UV Index: 11

Wind: 16 mph

2 PM

91°

Feels Like 106°

Humidity: 58%

UV Index: 10

Wind: 14 mph

3 PM

93°

Feels Like 106°

Humidity: 56%

UV Index: 7

Wind: 15 mph

4 PM

93°

Feels Like 102°

Humidity: 58%

UV Index: 5

Wind: 15 mph

5 PM

93°

Feels Like 102°

Humidity: 58%

UV Index: 3

Wind: 15 mph

6 PM

91°

Feels Like 100°

Humidity: 61%

UV Index: 2

Wind: 14 mph

7 PM

90°

Feels Like 99°

Humidity: 64%

UV Index: 1

Wind: 14 mph

8 PM

88°

Feels Like 95°

Humidity: 69%

UV Index: 0

Wind: 12 mph

9 PM

84°

Feels Like 93°

Humidity: 73%

UV Index: 0

Wind: 9 mph

10 PM

82°

Feels Like 91°

Humidity: 78%

UV Index: 0

Wind: 8 mph

11 PM

82°

Feels Like 90°

Humidity: 81%

UV Index: 0

Wind: 7 mph

Weather Alerts and Warnings for Naperville

Moderate Expected Likely

Heat Advisory

Heat Advisory issued June 29 at 3:13PM CDT until July 1 at 10:00PM CDT by NWS Chicago IL

Jun 29, 3:13 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.

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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 29, 8:53 PM Source: NWS Alert

Weather Alerts and Warnings for Naperville

Heat Advisory

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