Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS43 KLOT 012133
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
433 PM CDT MON SEP 01 2025
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 1 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 1:28 PM 101 1953 80 -3 76
MINIMUM 58 2:53 AM 45 1949 62 -4 60
AVERAGE 68 71 -3 68
PRECIPITATION (IN)
TODAY 0.00 2.92 1977 0.12 -0.12 0.00
MONTH TO DATE 0.00 0.12 -0.12 0.00
SINCE SEP 1 0.00 0.12 -0.12 0.00
SINCE JAN 1 22.45 26.83 -4.38 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 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 0 0 0 0
SINCE JUL 1 5 6 -1 0
COOLING
TODAY 3 7 -4 3
MONTH TO DATE 3 7 -4 3
SINCE SEP 1 3 7 -4 3
SINCE JAN 1 995 879 116 989
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (80)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION NE (50)
AVERAGE WIND SPEED 4.5
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 4:00 AM
LOWEST 39 12:00 PM
AVERAGE 63
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 101 1953
MINIMUM TEMPERATURE (F) 62 44 1946
SUNRISE AND SUNSET
SEPTEMBER 1 2025.....SUNRISE 6:18 AM CDT SUNSET 7:25 PM CDT
SEPTEMBER 2 2025.....SUNRISE 6:19 AM CDT SUNSET 7:23 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$