819
CDUS43 KLOT 172232
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
432 PM CST WED DEC 17 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 17 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 43 2:52 PM 60 1977 36 7 39
MINIMUM 33 7:31 AM -7 1951 24 9 33
AVERAGE 38 30 8 36
PRECIPITATION (IN)
TODAY 0.00 1.28 1921 0.07 -0.07 0.00
MONTH TO DATE 0.72 1.22 -0.50 0.41
SINCE DEC 1 0.72 1.22 -0.50 0.41
SINCE JAN 1 28.44 36.97 -8.53 33.40
SNOWFALL (IN)
TODAY 0.0 4.6 1951 0.2 -0.2 0.0
MONTH TO DATE 6.9 3.8 3.1 0.2
SINCE DEC 1 6.9 3.8 3.1 0.2
SINCE JUL 1 17.3 5.8 11.5 3.1
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 27 35 -8 29
MONTH TO DATE 717 555 162 596
SINCE DEC 1 717 555 162 596
SINCE JUL 1 1686 1706 -20 1363
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 1215 1003 212 1212
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION W (250)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION W (250)
AVERAGE WIND SPEED 7.2
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 85 7:00 AM
LOWEST 59 2:00 PM
AVERAGE 72
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 36 62 1877
MINIMUM TEMPERATURE (F) 24 -11 1983
SUNRISE AND SUNSET
DECEMBER 17 2025......SUNRISE 7:14 AM CST SUNSET 4:22 PM CST
DECEMBER 18 2025......SUNRISE 7:15 AM CST SUNSET 4:22 PM CST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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