Climatological Report (Daily)
Issued by NWS
Issued by NWS
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890
CDUS43 KLOT 210632
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
132 AM CDT THU AUG 21 2025
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR AUGUST 20 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 2:19 PM 98 1947 82 -6 72
MINIMUM 66 11:26 PM 47 1950 65 1 58
AVERAGE 71 74 -3 65
PRECIPITATION (IN)
YESTERDAY 0.00 1.47 1951 0.14 -0.14 0.00
MONTH TO DATE 4.68 2.80 1.88 1.50
SINCE JUN 1 12.60 10.61 1.99 10.49
SINCE JAN 1 22.10 25.26 -3.16 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 9 -3 0
MONTH TO DATE 239 192 47 178
SINCE JUN 1 928 717 211 772
SINCE JAN 1 962 787 175 852
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION NE (50)
AVERAGE WIND SPEED 13.1
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 3:00 AM
LOWEST 62 1:00 PM
AVERAGE 80
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 82 99 1955
MINIMUM TEMPERATURE (F) 65 46 1950
SUNRISE AND SUNSET
AUGUST 21 2025........SUNRISE 6:06 AM CDT SUNSET 7:42 PM CDT
AUGUST 22 2025........SUNRISE 6:07 AM CDT SUNSET 7:41 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$