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 Details for DuPage County Air Quality Alert
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Air Quality Alert AIR QUALITY ALERT - DuPage 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: 21-Jul-2026 @ 2:45am  
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Warmer 1.4°F than last hour.

76.6°F

---
High Today
76.6°F
2:41 AM 		Low Today
75.1°F
1:03 AM
Yest High
84.3°F
4:42 PM 		Yest Low
60.9°F
5:09 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:  WSW
0.0
Gusting to:
 0.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
-0.5 of 100
Overnight

Overnight: Scattered Showers And Thunderstorms
Scattered Showers And T-Storms
Tuesday

Tuesday: Scattered Showers And Thunderstorms then Mostly Sunny
Scattered Showers And T-Storms then Mostly Sunny
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Lo 72 °F Hi 83 °F Lo 59 °F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Increased 0.7°F since last hour. 73.1°F
Last Hour: Increased 0.7°F since last hour. 0.7°F
High 2:27 AM: 73.3°F
Low 12:06 AM: 72.1°F
Record High: 82.2°F on
Jul-3-2026
Record Low: 26.8°F on
May-7-2026
Wetbulb: 74.2°F
Rain Today
rain graph
Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.06 in
Jul Rain: 3.36 in
Jul to Date
  Avg:10 		0.00 in
Jul to Date
  Diff from Avg:10 		Over 3.36 in for the month 3.36 in
Jul Avg: 0.00 in
Diff from Avg: Over 3.36 in for the month 3.36 in
Season:1 17.68 in
YTD
  Avg:11 		14.19 in
YTD
  Diff from Avg:11 		Over 3.49 in for the year 3.49 in
Last Rain
Time/Date: 		Jul-18-2026
at 12:37 PM
24 rain days in 2026
4 days in July
2 days since last rain
Current: WSW  0.0 mph
1Hr Average: Calm
Wind Run: 0.15 miles
Wind Gust
Current: 0.0 mph
Today: 7.0 mph 12:28 AM
Month: 22.6 mph 3-Jul
Year: 22.6 mph 3-Jul
Record Gust: 22.6 mph
Jul-3-2026
Sunlight:
14 h 47 m 6 s
of Sunlight Yesterday
14 h 45 m 24 s
of Sunlight Today Which is
1 min 42 sec shorter than
yesterday
0 h 0 m 0 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

First Quarter
First Quarter, 6 days, 22 hours, 4 minutes in cycle
48%
Illuminated
Humidity Barometer
Current: Decreased 2% since last hour. 89%
Last Hour: Decreased 2% since last hour. 2%
High 1:54 AM: 92%
Low 2:37 AM: 89%
Record High: 97%
May-24-2026
Record Low: 21%
Jun-2-2026
Current: Falling 0.004 inHg/hr 29.099 inHg
Last Hour: Steady
High 12:05 AM: 29.119
Low 2:14 AM: 29.093
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: 1.0
Jul: 236.6
2026 to Date: 467.6
Heating Degree Days
2026 to Date: 161.4
Current: 77.4°F
High 2:41am: 76.6°F
Yesterday: 90.1°F
Record: 120.0°F
Jun-30-2026
Quality
Index6:
26

Good
Density:
1.14 kg/m3
UV Summary/Forecast Solar Summary
Jul-21

7.7 		Jul-22

7.9 		Jul-23

8.2
Sunrise is at: 5:35 am
Solar Noon: 12:58
Sunset is at: 8:21 pm
Almanac   Station All Time Records Cloud Level
Currently: Night
YTD Avg Temp: 69.5°F
Sunrise: 5:35 am
Sunset: 8:21 pm
Moonrise: 1:52 pm
Moonset: 11:28 pm
Full Moon: Jul-29-2026
New Moon: 17:37 UTC
Aug-12-2026
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: 21-Jul-2026 @ 2:45am  
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 21 of just the month of July for this station since 2012.   11 Historical average rain this season to day 21 of July for this station since 2012.
 NWS Weather Forecast   -   Outlook Overnight & Tuesday
Overnight

Overnight: Scattered Showers And Thunderstorms
Scattered Showers And T-Storms

Lo 72 °F 		NWS forecast: Scattered showers and thunderstorms. Mostly cloudy, with a low around 72. West southwest wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Local station forecast: Mostly cloudy and cooler, precipitation possible within 12 hours, possibly heavy at times, windy. 		Tuesday

Tuesday: Scattered Showers And Thunderstorms then Mostly Sunny
Scattered Showers And T-Storms then Mostly Sunny

Hi 83 °F 		NWS forecast: Scattered showers and thunderstorms before 7am. Mostly sunny. High near 83, with temperatures falling to around 80 in the afternoon. West northwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
 NWS Short Term Weather Forecast
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Wednesday

Wednesday: Sunny
Sunny
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday

Thursday: Sunny
Sunny
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
Friday

Friday: Mostly Sunny
Mostly Sunny
Friday
Night
Friday Night: Mostly Clear
Mostly Clear
Lo 59 °F Hi 70 °F Lo 55 °F Hi 76 °F Lo 60 °F Hi 79 °F Lo 60 °F



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