Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS43 KLOT 220637
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
137 AM CDT FRI AUG 22 2025
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR AUGUST 21 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 76 3:09 PM 99 1955 82 -6 76
MINIMUM 65 11:43 PM 46 1950 65 0 56
AVERAGE 71 73 -2 66
PRECIPITATION (IN)
YESTERDAY 0.00 2.00 1874 0.13 -0.13 0.00
MONTH TO DATE 4.68 2.93 1.75 1.50
SINCE JUN 1 12.60 10.74 1.86 10.49
SINCE JAN 1 22.10 25.39 -3.29 25.76
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 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
YESTERDAY 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
YESTERDAY 6 8 -2 1
MONTH TO DATE 245 200 45 179
SINCE JUN 1 934 725 209 773
SINCE JAN 1 968 795 173 853
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION NE (40)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION NE (60)
AVERAGE WIND SPEED 8.6
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 4:00 AM
LOWEST 62 11:00 AM
AVERAGE 78
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 82 99 1936
MINIMUM TEMPERATURE (F) 65 49 2004
SUNRISE AND SUNSET
AUGUST 22 2025........SUNRISE 6:07 AM CDT SUNSET 7:41 PM CDT
AUGUST 23 2025........SUNRISE 6:08 AM CDT SUNSET 7:39 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$