


Climatological Report (Daily)
Issued by NWS
Issued by NWS
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523 CDUS43 KLOT 092145 CLIORD CLIMATE REPORT NATIONAL WEATHER SERVICE CHICAGO IL 445 PM CDT THU OCT 09 2025 ................................... ...THE CHICAGO-OHARE CLIMATE SUMMARY FOR OCTOBER 9 2025... VALID TODAY AS OF 0400 PM LOCAL TIME. CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1871 TO 2025 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) TODAY MAXIMUM 64 1:26 PM 86 1949 66 -2 70 2010 MINIMUM 45 3:34 AM 30 2000 48 -3 51 AVERAGE 55 57 -2 61 PRECIPITATION (IN) TODAY 0.00 2.27 1954 0.11 -0.11 0.00 MONTH TO DATE 1.35 1.00 0.35 0.01 SINCE SEP 1 1.84 4.19 -2.35 1.33 SINCE JAN 1 24.29 30.90 -6.61 28.19 SNOWFALL (IN) TODAY 0.0 T 1906 0.0 0.0 0.0 1925 MONTH TO DATE 0.0 0.0 0.0 0.0 SINCE SEP 1 0.0 0.0 0.0 0.0 SINCE JUL 1 0.0 0.0 0.0 0.0 SNOW DEPTH 0 DEGREE DAYS HEATING TODAY 10 9 1 4 MONTH TO DATE 24 69 -45 22 SINCE SEP 1 56 146 -90 37 SINCE JUL 1 61 152 -91 37 COOLING TODAY 0 1 -1 0 MONTH TO DATE 55 9 46 9 SINCE SEP 1 221 125 96 199 SINCE JAN 1 1213 997 216 1185 ................................................................... WIND (MPH) HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (110) HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION E (100) AVERAGE WIND SPEED 5.5 SKY COVER AVERAGE SKY COVER 0.2 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED TODAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 86 3:00 AM LOWEST 39 2:00 PM AVERAGE 63 .......................................................... THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 65 86 1962 MINIMUM TEMPERATURE (F) 48 27 1964 SUNRISE AND SUNSET OCTOBER 9 2025.......SUNRISE 6:58 AM CDT SUNSET 6:19 PM CDT OCTOBER 10 2025.......SUNRISE 6:59 AM CDT SUNSET 6:18 PM CDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$