CDUS43 KLOT 272139 CLIORD CLIMATE REPORT NATIONAL WEATHER SERVICE CHICAGO IL 439 PM CDT MON OCT 27 2025 ................................... ...THE CHICAGO-OHARE CLIMATE SUMMARY FOR OCTOBER 27 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 57 11:57 AM 83 1927 58 -1 59 MINIMUM 45 5:58 AM 24 1942 42 3 37 AVERAGE 51 50 1 48 PRECIPITATION (IN) TODAY 0.00 1.56 1947 0.11 -0.11 0.00 MONTH TO DATE 2.53 3.01 -0.48 1.15 SINCE SEP 1 3.02 6.20 -3.18 2.47 SINCE JAN 1 25.47 32.91 -7.44 29.33 SNOWFALL (IN) TODAY 0.0 2.7 1967 0.0 0.0 0.0 MONTH TO DATE 0.0 0.1 -0.1 0.0 SINCE SEP 1 0.0 0.1 -0.1 0.0 SINCE JUL 1 0.0 0.1 -0.1 0.0 SNOW DEPTH 0 DEGREE DAYS HEATING TODAY 14 16 -2 17 MONTH TO DATE 199 291 -92 176 SINCE SEP 1 231 368 -137 191 SINCE JUL 1 236 374 -138 191 COOLING TODAY 0 0 0 0 MONTH TO DATE 57 12 45 16 SINCE SEP 1 223 128 95 206 SINCE JAN 1 1215 1000 215 1192 ................................................................... WIND (MPH) HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION NE (50) HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION NE (60) AVERAGE WIND SPEED 10.5 SKY COVER AVERAGE SKY COVER 0.2 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED TODAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 83 3:00 AM LOWEST 42 11:00 AM AVERAGE 63 .......................................................... THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 57 80 1999 MINIMUM TEMPERATURE (F) 41 19 1925 SUNRISE AND SUNSET OCTOBER 27 2025.......SUNRISE 7:18 AM CDT SUNSET 5:52 PM CDT OCTOBER 28 2025.......SUNRISE 7:20 AM CDT SUNSET 5:50 PM CDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$