


Climatological Report (Daily)
Issued by NWS
Issued by NWS
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200 CDUS43 KLOT 172139 CLIORD CLIMATE REPORT NATIONAL WEATHER SERVICE CHICAGO IL 439 PM CDT FRI OCT 17 2025 ................................... ...THE CHICAGO-OHARE CLIMATE SUMMARY FOR OCTOBER 17 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 74 2:59 PM 86 1950 62 12 64 MINIMUM 57 5:26 AM 26 1948 45 12 38 AVERAGE 66 54 12 51 PRECIPITATION (IN) TODAY 0.00 3.61 1988 0.11 -0.11 0.00 MONTH TO DATE 1.55 1.91 -0.36 0.30 SINCE SEP 1 2.04 5.10 -3.06 1.62 SINCE JAN 1 24.49 31.81 -7.32 28.48 SNOWFALL (IN) TODAY 0.0 T 1930 0.0 0.0 0.0 1976 2022 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 0 12 -12 14 MONTH TO DATE 59 153 -94 98 SINCE SEP 1 91 230 -139 113 SINCE JUL 1 96 236 -140 113 COOLING TODAY 1 0 1 0 MONTH TO DATE 56 12 44 13 SINCE SEP 1 222 128 94 203 SINCE JAN 1 1214 1000 214 1189 ................................................................... WIND (MPH) HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION S (200) HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION SW (210) AVERAGE WIND SPEED 10.1 SKY COVER AVERAGE SKY COVER 0.6 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED TODAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 60 6:00 AM LOWEST 48 3:00 PM AVERAGE 54 .......................................................... THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 62 87 1950 MINIMUM TEMPERATURE (F) 45 20 1948 SUNRISE AND SUNSET OCTOBER 17 2025.......SUNRISE 7:07 AM CDT SUNSET 6:06 PM CDT OCTOBER 18 2025.......SUNRISE 7:08 AM CDT SUNSET 6:05 PM CDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$