501
CDUS43 KLOT 200632
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
132 AM CDT SAT SEP 20 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 19 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 89 12:37 PM 93 1955 74 15 89
MINIMUM 67 4:55 AM 40 1991 56 11 62
AVERAGE 78 65 13 76
PRECIPITATION (IN)
YESTERDAY 0.00 1.72 2001 0.11 -0.11 0.00
MONTH TO DATE 0.28 2.05 -1.77 0.04
SINCE SEP 1 0.28 2.05 -1.77 0.04
SINCE JAN 1 22.73 28.76 -6.03 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 27 5 14
SINCE SEP 1 32 27 5 14
SINCE JUL 1 37 33 4 14
COOLING
YESTERDAY 13 3 10 11
MONTH TO DATE 87 93 -6 133
SINCE SEP 1 87 93 -6 133
SINCE JAN 1 1079 965 114 1119
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WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (160)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION SE (150)
AVERAGE WIND SPEED 5.3
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 84 3:00 AM
LOWEST 33 12:00 PM
AVERAGE 59
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THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 93 2018
MINIMUM TEMPERATURE (F) 55 36 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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