Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS43 KLOT 202134
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
434 PM CDT WED AUG 20 2025
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR AUGUST 20 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 2:19 PM 98 1947 82 -6 72
MINIMUM 67 4:43 AM 47 1950 65 2 58
AVERAGE 72 74 -2 65
PRECIPITATION (IN)
TODAY 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)
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 7 9 -2 0
MONTH TO DATE 240 192 48 178
SINCE JUN 1 929 717 212 772
SINCE JAN 1 963 787 176 852
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION NE (40)
AVERAGE WIND SPEED 12.6
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
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 TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 82 99 1955
MINIMUM TEMPERATURE (F) 65 46 1950
SUNRISE AND SUNSET
AUGUST 20 2025........SUNRISE 6:05 AM CDT SUNSET 7:44 PM CDT
AUGUST 21 2025........SUNRISE 6:06 AM CDT SUNSET 7:42 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$