Climatological Report (Daily)
Issued by NWS
Issued by NWS
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064
CDUS43 KLOT 152141
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
441 PM CDT FRI AUG 15 2025
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR AUGUST 15 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 90 2:56 PM 98 1944 83 7 76
MINIMUM 69 1:37 AM 48 2004 66 3 67
AVERAGE 80 74 6 72
PRECIPITATION (IN)
TODAY 0.00 1.87 1993 0.14 -0.14 0.25
MONTH TO DATE 0.52 2.09 -1.57 1.10
SINCE JUN 1 8.44 9.90 -1.46 10.09
SINCE JAN 1 17.94 24.55 -6.61 25.36
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 0 0 0 0
SINCE JUN 1 13 33 -20 6
SINCE JUL 1 0 2 -2 0
COOLING
TODAY 15 9 6 7
MONTH TO DATE 181 147 34 140
SINCE JUN 1 870 672 198 734
SINCE JAN 1 904 742 162 814
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (170)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION S (170)
AVERAGE WIND SPEED 4.4
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 78 4:00 AM
LOWEST 47 2:00 PM
AVERAGE 63
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 83 98 1983
1988
MINIMUM TEMPERATURE (F) 65 48 2004
SUNRISE AND SUNSET
AUGUST 15 2025........SUNRISE 6:00 AM CDT SUNSET 7:51 PM CDT
AUGUST 16 2025........SUNRISE 6:01 AM CDT SUNSET 7:50 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$