461
CDUS43 KLOT 220640
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
140 AM CDT MON SEP 22 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 21 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 2:16 PM 94 2017 74 9 92
MINIMUM 67 7:26 AM 39 1889 55 12 63
1983
1991
AVERAGE 75 64 11 78
PRECIPITATION (IN)
YESTERDAY 0.01 1.67 1947 0.11 -0.10 0.00
MONTH TO DATE 0.40 2.27 -1.87 0.06
SINCE SEP 1 0.40 2.27 -1.87 0.06
SINCE JAN 1 22.85 28.98 -6.13 26.92
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 33 -1 14
SINCE SEP 1 32 33 -1 14
SINCE JUL 1 37 39 -2 14
COOLING
YESTERDAY 10 3 7 13
MONTH TO DATE 104 99 5 161
SINCE SEP 1 104 99 5 161
SINCE JAN 1 1096 971 125 1147
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION NW (330)
AVERAGE WIND SPEED 6.3
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 4:00 AM
LOWEST 56 3:00 PM
AVERAGE 75
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 73 94 2017
MINIMUM TEMPERATURE (F) 55 32 1995
SUNRISE AND SUNSET
SEPTEMBER 22 2025.....SUNRISE 6:39 AM CDT SUNSET 6:48 PM CDT
SEPTEMBER 23 2025.....SUNRISE 6:40 AM CDT SUNSET 6:47 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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