510
CDUS43 KLOT 202149
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
449 PM CDT SAT SEP 20 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 20 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 77 11:20 AM 93 2018 74 3 91
MINIMUM 66 5:40 AM 36 1991 55 11 69
AVERAGE 72 65 7 80
PRECIPITATION (IN)
TODAY 0.11 1.33 2001 0.11 0.00 0.02
MONTH TO DATE 0.39 2.16 -1.77 0.06
SINCE SEP 1 0.39 2.16 -1.77 0.06
SINCE JAN 1 22.84 28.87 -6.03 26.92
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 30 2 14
SINCE SEP 1 32 30 2 14
SINCE JUL 1 37 36 1 14
COOLING
TODAY 7 3 4 15
MONTH TO DATE 94 96 -2 148
SINCE SEP 1 94 96 -2 148
SINCE JAN 1 1086 968 118 1134
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (160)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION S (170)
AVERAGE WIND SPEED 5.2
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
THUNDERSTORM
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 7:00 AM
LOWEST 62 11:00 AM
AVERAGE 75
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 94 2017
MINIMUM TEMPERATURE (F) 55 39 1889
1983
1991
SUNRISE AND SUNSET
SEPTEMBER 20 2025.....SUNRISE 6:37 AM CDT SUNSET 6:52 PM CDT
SEPTEMBER 21 2025.....SUNRISE 6:38 AM CDT SUNSET 6:50 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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