Climatological Report (Daily)
Issued by NWS
Issued by NWS
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059
CDUS43 KLOT 212133
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
433 PM CDT THU AUG 21 2025
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR AUGUST 21 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 2:41 PM 99 1955 82 -6 76
MINIMUM 65 5:25 AM 46 1950 65 0 56
AVERAGE 71 73 -2 66
PRECIPITATION (IN)
TODAY 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)
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 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 9.3
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 4:00 AM
LOWEST 62 11:00 AM
AVERAGE 78
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 82 99 1936
MINIMUM TEMPERATURE (F) 65 49 2004
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.
$$