


Climatological Report (Daily)
Issued by NWS
Issued by NWS
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198 CDUS43 KLOT 172139 CLIDPA CLIMATE REPORT NATIONAL WEATHER SERVICE CHICAGO IL 439 PM CDT FRI OCT 17 2025 ................................... ...THE DUPAGE AIRPORT CLIMATE SUMMARY FOR OCTOBER 17 2025... VALID TODAY AS OF 0400 PM LOCAL TIME. CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1997 TO 2025 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) TODAY MAXIMUM 76 2:59 PM 83 2016 62 14 65 MINIMUM 55 3:44 AM 28 2004 42 13 30 AVERAGE 66 52 14 48 PRECIPITATION (IN) TODAY 0.00 3.05 1998 0.10 -0.10 0.00 MONTH TO DATE 1.85 1.76 0.09 0.13 SINCE SEP 1 2.49 4.76 -2.27 1.55 SINCE JAN 1 23.02 28.13 -5.11 25.87 DEGREE DAYS HEATING TODAY 0 13 -13 17 MONTH TO DATE 73 177 -104 136 SINCE SEP 1 120 277 -157 169 SINCE JUL 1 131 288 -157 178 COOLING TODAY 1 0 1 0 MONTH TO DATE 48 9 39 3 SINCE SEP 1 175 97 78 113 SINCE JAN 1 1083 821 262 911 ................................................................... WIND (MPH) HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION S (180) HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION S (200) AVERAGE WIND SPEED 11.1 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED TODAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 69 6:00 AM LOWEST 50 2:00 PM AVERAGE 60 .......................................................... THE DUPAGE AIRPORT CLIMATE NORMALS FOR TOMORROW NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 62 78 2007 MINIMUM TEMPERATURE (F) 41 27 2015 SUNRISE AND SUNSET OCTOBER 17 2025.......SUNRISE 7:08 AM CDT SUNSET 6:08 PM CDT OCTOBER 18 2025.......SUNRISE 7:09 AM CDT SUNSET 6:06 PM CDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$