395
CDUS43 KLOT 182133
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
433 PM CDT THU SEP 18 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 18 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 87 1:53 PM 94 1955 75 12 88
MINIMUM 62 5:46 AM 40 1889 56 6 61
1901
1903
AVERAGE 75 66 9 75
PRECIPITATION (IN)
TODAY 0.00 2.41 2015 0.10 -0.10 0.00
MONTH TO DATE 0.28 1.94 -1.66 0.04
SINCE SEP 1 0.28 1.94 -1.66 0.04
SINCE JAN 1 22.73 28.65 -5.92 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 3 -3 0
MONTH TO DATE 32 24 8 14
SINCE SEP 1 32 24 8 14
SINCE JUL 1 37 30 7 14
COOLING
TODAY 10 3 7 10
MONTH TO DATE 74 90 -16 122
SINCE SEP 1 74 90 -16 122
SINCE JAN 1 1066 962 104 1108
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (80)
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION E (90)
AVERAGE WIND SPEED 2.7
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 4:00 AM
LOWEST 31 2:00 PM
AVERAGE 61
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 93 1955
MINIMUM TEMPERATURE (F) 56 40 1991
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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