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Heat Advisory HEAT ADVISORY - DuPage County  - Will County

NWS Central Great Lakes Regional Radar WU North Central Satellite
Radar/Satellite images courtesy of NOAA/NWS and Weather Underground.
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METRIC | IMPERIAL
Updated: 02-Sep-2026 @ 12:45am  
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 0.9°F than last hour.

77.7°F

Feels like:  79.7°F
---
High Today
78.5°F
12:09 AM
Low Today
77.5°F
12:34 AM
Yest High
96.5°F
2:44 PM
Yest Low
75.7°F
6:25 AM
Sta* High
---°F
2026
Sta* Low
---°F
2026
* This Station's Records Since 12/2012
Rec* High
32.0°F
0
Rec* Low
32.0°F
0
* Records from Weather Underground
Night time, Humid Night time, Humid

Calm Wind:  SSW
0.0

Gusting to:
0.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
-0.2 of 100
Tonight

Tonight: Mostly Clear
Mostly Clear
Wednesday

Wednesday: Sunny
Sunny
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Lo 73 °F Hi 92 °F Lo 73 °F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 0.2°F since last hour. 73.5°F
Last Hour: Decreased 0.2°F since last hour. 0.2°F
High 12:09 AM: 74.0°F
Low 12:31 AM: 73.1°F
Record High: 82.4°F on
Sep-1-2026
Record Low: 26.8°F on
May-7-2026
Wetbulb: 74.8°F
Rain Today
rain graph

Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.50 in
Sep Rain: 0.00 in
Sep to Date
  Avg:10
0.00 in
Sep to Date
  Diff from Avg:10
No Change 0.00 in
Sep Avg: 0.00 in
Diff from Avg: No Change 0.00 in
Season:1 28.97 in
YTD
  Avg:11
28.71 in
YTD
  Diff from Avg:11
Over 0.26 in for the year 0.26 in
Last Rain
Time/Date:
Aug-31-2026
at 5:38 PM
40 rain days in 2026
0 days in September
1 day since last rain
Current: SSW  0.0 mph
1Hr Average: Calm
Wind Run: 0.00 miles
Wind Gust
Current: 0.0 mph
Today: 0.0 mph 3:09 PM
Month: 7.0 mph 1-Sep
Year: 22.6 mph 3-Jul
Record Gust: 22.6 mph
Jul-3-2026
Sunlight:
13 h 7 m 37 s
of Sunlight Yesterday
13 h 4 m 55 s
of Sunlight Today
Which is
2 min 42 sec shorter than
yesterday
0 h 0 m 0 s
of Sunlight Tomorrow
(Noon) graph (Midnight)
Legend

Waning Gibbous
Waning Gibbous, 20 days, 12 hours, 12 minutes in cycle
72%
Illuminated
Humidity Barometer
Current: Increased 2% since last hour. 87%
Last Hour: Increased 2% since last hour. 2%
High 12:32 AM: 87%
Low 12:11 AM: 85%
Record High: 97%
May-24-2026
Record Low: 21%
Jun-2-2026
Current: Falling 0.009  inHg/hr 29.367 inHg
Last Hour: Steady
High 12:00 AM: 29.374
Low 12:42 AM: 29.366
Record High: 29.787 inHg
Jun-3-2026
Record Low: 28.777 inHg
Jun-17-2026
Cooling Degree Days Coming Soon Heat Index Air
Today: 0.2
Sep: 20.4
2026 to Date: 857.5
Heating Degree Days
2026 to Date: 161.4
Current: 79.7°F
High 12:09am: 78.5°F
Yesterday: 120.7°F
Record: 120.7°F
Sep-1-2026
Data Not
Available


Data Not Available
Density:
1.15 kg/m3
UV Summary/Forecast Solar Summary
Sep-02

7.0
Sep-03

7.6
Sep-04

7.7
Sunrise is at: 6:18 am
Solar Noon: 12:51
Sunset is at: 7:25 pm
Almanac   Station All Time Records Cloud Level
Currently: Night
YTD Avg Temp: 71.2°F
Sunrise: 6:18 am
Sunset: 7:25 pm
Moonrise: 9:24 pm
Moonset: 12:26 pm
Full Moon: Aug-28-2026
New Moon: 03:28 UTC
Sep-11-2026
HIGHS: LOWS:
98.8°F
Jul-14-2026
29.3°F
May-7-2026
Daytime Records
  91.2°F
Jul-01-2026
  54.0°F
May-06-2026
Nitetime Records
  84.2°F
Jul-01-2026
  39.6°F
May-07-2026
ICN:1 | S3C2:0 | Ajax 3.xx
ISS:Ok | CON:4.7 | RCP:100%
METRIC | IMPERIAL
Updated: 02-Sep-2026 @ 12:45am  
1 Rain season: Jan 1st to Dec 31st.   2 Snow season July 1st to June 30th.   3 Snow manually measured usually around 7AM and 7PM.   6 Air Quality Index is provided by Minnesota Polution Control Agency and is updated hourly between the hours of 6AM and Midnight.   10 Historical average only to day 2 of just the month of September for this station since 2012.   11 Historical average rain this season to day 2 of September for this station since 2012.
  Weather Forecast   -   Outlook Tonight & Wednesday
Tonight

Tonight: Mostly Clear
Mostly Clear

Lo 73 °F
NWS forecast: Mostly clear, with a low around 73. South southwest wind around 5 mph, with gusts as high as 15 mph.
Local station forecast: Mostly cloudy and cooler, precipitation possible within 12 hours, possibly heavy at times, windy.
Wednesday

Wednesday: Sunny
Sunny

Hi 92 °F
NWS forecast: Sunny, with a high near 92. Heat index values as high as 101. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
  Short Term Weather Forecast
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday

Thursday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
Thursday
Night
Thursday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Friday

Friday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Friday
Night
Friday Night: Partly Cloudy then Chance Showers And Thunderstorms
Partly Cloudy then Chance Showers And T-Storms
Saturday

Saturday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Saturday
Night
Saturday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Lo 73 °F Hi 90 °F Lo 72 °F Hi 88 °F Lo 70 °F Hi 87 °F Lo 69 °F



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