Climatological Report (Daily)
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233
CDUS43 KLOT 042145
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
445 PM CDT THU SEP 04 2025
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 4 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 66 2:59 PM 95 1954 80 -14 84
1960
1983
MINIMUM 48 5:57 AM 45 1982 62 -14 58
1997
AVERAGE 57 70 -13 71
PRECIPITATION (IN)
TODAY 0.00 2.95 1894 0.12 -0.12 0.00
MONTH TO DATE 0.01 0.47 -0.46 0.00
SINCE SEP 1 0.01 0.47 -0.46 0.00
SINCE JAN 1 22.46 27.18 -4.72 26.86
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 8 1 7 0
MONTH TO DATE 9 1 8 0
SINCE SEP 1 9 1 8 0
SINCE JUL 1 14 7 7 0
COOLING
TODAY 0 6 -6 6
MONTH TO DATE 8 25 -17 14
SINCE SEP 1 8 25 -17 14
SINCE JAN 1 1000 897 103 1000
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION W (250)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 9.4
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 83 4:00 AM
LOWEST 37 1:00 PM
AVERAGE 60
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 79 98 1899
MINIMUM TEMPERATURE (F) 61 44 1984
1988
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.
$$