Climatological Report (Daily)
Issued by NWS
Issued by NWS
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748
CDUS43 KLOT 272133
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
433 PM CDT WED AUG 27 2025
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR AUGUST 27 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 76 1:48 PM 99 2024 81 -5 99
MINIMUM 55 5:46 AM 47 1982 64 -9 74
AVERAGE 66 72 -6 87
PRECIPITATION (IN)
TODAY 0.00 1.59 1923 0.13 -0.13 0.64
MONTH TO DATE 4.68 3.71 0.97 2.14
SINCE JUN 1 12.60 11.52 1.08 11.13
SINCE JAN 1 22.10 26.17 -4.07 26.40
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 JUN 1 0.0 0.0 0.0 T
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 3 0 3 0
SINCE JUN 1 16 33 -17 6
SINCE JUL 1 3 2 1 0
COOLING
TODAY 1 8 -7 22
MONTH TO DATE 262 248 14 265
SINCE JUN 1 951 773 178 859
SINCE JAN 1 985 843 142 939
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION W (250)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION W (280)
AVERAGE WIND SPEED 6.5
SKY COVER
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 80 5:00 AM
LOWEST 39 1:00 PM
AVERAGE 60
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 81 97 1953
1955
MINIMUM TEMPERATURE (F) 63 42 1986
SUNRISE AND SUNSET
AUGUST 27 2025........SUNRISE 6:12 AM CDT SUNSET 7:33 PM CDT
AUGUST 28 2025........SUNRISE 6:13 AM CDT SUNSET 7:31 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$