437
CDUS43 KLOT 040638
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
138 AM CDT THU SEP 04 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 3 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 72 9:35 AM 97 1953 80 -8 78
MINIMUM 55 11:59 PM 47 1974 62 -7 58
AVERAGE 64 71 -7 68
PRECIPITATION (IN)
YESTERDAY 0.01 1.92 1961 0.11 -0.10 0.00
MONTH TO DATE 0.01 0.35 -0.34 0.00
SINCE SEP 1 0.01 0.35 -0.34 0.00
SINCE JAN 1 22.46 27.06 -4.60 26.86
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 1 0 1 0
MONTH TO DATE 1 0 1 0
SINCE SEP 1 1 0 1 0
SINCE JUL 1 6 6 0 0
COOLING
YESTERDAY 0 6 -6 3
MONTH TO DATE 8 19 -11 8
SINCE SEP 1 8 19 -11 8
SINCE JAN 1 1000 891 109 994
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WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION NW (330)
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 10.3
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 84 1:00 PM
LOWEST 53 9:00 PM
AVERAGE 69
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THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 95 1954
1960
1983
MINIMUM TEMPERATURE (F) 62 45 1982
1997
SUNRISE AND SUNSET
SEPTEMBER 4 2025.....SUNRISE 6:21 AM CDT SUNSET 7:20 PM CDT
SEPTEMBER 5 2025.....SUNRISE 6:22 AM CDT SUNSET 7:18 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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