498
CDUS43 KLOT 110641
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
141 AM CDT THU SEP 11 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 10 2025
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)
YESTERDAY
MAXIMUM 82 3:26 PM 95 1983 78 4 82
2013
MINIMUM 60 5:32 AM 44 1943 59 1 58
AVERAGE 71 69 2 70
PRECIPITATION (IN)
YESTERDAY 0.00 2.48 1922 0.10 -0.10 0.00
MONTH TO DATE 0.01 1.12 -1.11 0.04
SINCE SEP 1 0.01 1.12 -1.11 0.04
SINCE JAN 1 22.46 27.83 -5.37 26.90
SNOWFALL (IN)
YESTERDAY 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
YESTERDAY 0 1 -1 0
MONTH TO DATE 32 7 25 14
SINCE SEP 1 32 7 25 14
SINCE JUL 1 37 13 24 14
COOLING
YESTERDAY 6 5 1 5
MONTH TO DATE 14 58 -44 34
SINCE SEP 1 14 58 -44 34
SINCE JAN 1 1006 930 76 1020
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION NE (30)
AVERAGE WIND SPEED 5.5
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 70 8:00 PM
LOWEST 28 4:00 PM
AVERAGE 49
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 95 1952
MINIMUM TEMPERATURE (F) 59 42 1993
SUNRISE AND SUNSET
SEPTEMBER 11 2025.....SUNRISE 6:28 AM CDT SUNSET 7:07 PM CDT
SEPTEMBER 12 2025.....SUNRISE 6:29 AM CDT SUNSET 7:06 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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