924
CDUS43 KLOT 122135
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
435 PM CDT FRI SEP 12 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 12 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 84 1:43 PM 96 1952 77 7 87
MINIMUM 60 5:51 AM 44 1955 59 1 63
2014
AVERAGE 72 68 4 75
PRECIPITATION (IN)
TODAY 0.00 2.43 1961 0.10 -0.10 0.00
MONTH TO DATE 0.01 1.33 -1.32 0.04
SINCE SEP 1 0.01 1.33 -1.32 0.04
SINCE JAN 1 22.46 28.04 -5.58 26.90
SNOWFALL (IN)
TODAY 0.0 0.0 MM 0.0 0.0 0.0
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 2 -2 0
MONTH TO DATE 32 10 22 14
SINCE SEP 1 32 10 22 14
SINCE JUL 1 37 16 21 14
COOLING
TODAY 7 4 3 10
MONTH TO DATE 26 67 -41 52
SINCE SEP 1 26 67 -41 52
SINCE JAN 1 1018 939 79 1038
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION S (160)
AVERAGE WIND SPEED 6.1
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 4:00 AM
LOWEST 34 3:00 PM
AVERAGE 65
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 98 1939
MINIMUM TEMPERATURE (F) 58 39 1890
SUNRISE AND SUNSET
SEPTEMBER 12 2025.....SUNRISE 6:29 AM CDT SUNSET 7:06 PM CDT
SEPTEMBER 13 2025.....SUNRISE 6:30 AM CDT SUNSET 7:04 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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