903
CDUS43 KLOT 180640
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
140 AM CDT THU SEP 18 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 17 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 2:02 PM 93 1955 75 8 85
MINIMUM 61 5:52 AM 37 1984 57 4 62
AVERAGE 72 66 6 74
PRECIPITATION (IN)
YESTERDAY 0.00 2.42 1927 0.11 -0.11 0.00
MONTH TO DATE 0.28 1.84 -1.56 0.04
SINCE SEP 1 0.28 1.84 -1.56 0.04
SINCE JAN 1 22.73 28.55 -5.82 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 3 -3 0
MONTH TO DATE 32 21 11 14
SINCE SEP 1 32 21 11 14
SINCE JUL 1 37 27 10 14
COOLING
YESTERDAY 7 4 3 9
MONTH TO DATE 64 87 -23 112
SINCE SEP 1 64 87 -23 112
SINCE JAN 1 1056 959 97 1098
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NE (60)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION E (80)
AVERAGE WIND SPEED 4.8
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 6:00 AM
LOWEST 42 4:00 PM
AVERAGE 68
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 94 1955
MINIMUM TEMPERATURE (F) 56 40 1889
1901
1903
SUNRISE AND SUNSET
SEPTEMBER 18 2025.....SUNRISE 6:35 AM CDT SUNSET 6:55 PM CDT
SEPTEMBER 19 2025.....SUNRISE 6:36 AM CDT SUNSET 6:54 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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