185
CDUS43 KLOT 160637
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
137 AM CDT TUE SEP 16 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 15 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 83 2:10 PM 99 1939 76 7 90
MINIMUM 65 5:49 AM 39 2007 58 7 67
AVERAGE 74 67 7 79
PRECIPITATION (IN)
YESTERDAY 0.00 1.38 1936 0.10 -0.10 0.00
MONTH TO DATE 0.28 1.63 -1.35 0.04
SINCE SEP 1 0.28 1.63 -1.35 0.04
SINCE JAN 1 22.73 28.34 -5.61 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 2 -2 0
MONTH TO DATE 32 16 16 14
SINCE SEP 1 32 16 16 14
SINCE JUL 1 37 22 15 14
COOLING
YESTERDAY 9 4 5 14
MONTH TO DATE 49 79 -30 90
SINCE SEP 1 49 79 -30 90
SINCE JAN 1 1041 951 90 1076
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NE (60)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION E (90)
AVERAGE WIND SPEED 7.0
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 81 11:00 PM
LOWEST 41 2:00 PM
AVERAGE 61
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 76 92 1931
1955
MINIMUM TEMPERATURE (F) 57 37 1984
SUNRISE AND SUNSET
SEPTEMBER 16 2025.....SUNRISE 6:33 AM CDT SUNSET 6:59 PM CDT
SEPTEMBER 17 2025.....SUNRISE 6:34 AM CDT SUNSET 6:57 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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