485
CDUS43 KLOT 120635
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1235 AM CST FRI DEC 12 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 11 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 27 5:27 PM 61 1949 38 -11 32
MINIMUM 23 9:02 AM -5 1972 26 -3 11
AVERAGE 25 32 -7 22
PRECIPITATION (IN)
YESTERDAY 0.00 1.73 1949 0.07 -0.07 T
MONTH TO DATE 0.72 0.83 -0.11 T
SINCE DEC 1 0.72 0.83 -0.11 T
SINCE JAN 1 28.44 36.58 -8.14 32.99
SNOWFALL (IN)
YESTERDAY 0.0 9.5 2000 0.2 -0.2 T
MONTH TO DATE 6.9 2.4 4.5 0.2
SINCE DEC 1 6.9 2.4 4.5 0.2
SINCE JUL 1 17.3 4.4 12.9 3.1
SNOW DEPTH 1
DEGREE DAYS
HEATING
YESTERDAY 40 33 7 43
MONTH TO DATE 450 349 101 386
SINCE DEC 1 450 349 101 386
SINCE JUL 1 1419 1500 -81 1153
COOLING
YESTERDAY 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 14 HIGHEST WIND DIRECTION NW (320)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION NW (320)
AVERAGE WIND SPEED 6.2
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 71 10:00 PM
LOWEST 57 1:00 PM
AVERAGE 64
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THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 37 61 1877
MINIMUM TEMPERATURE (F) 25 -8 2000
SUNRISE AND SUNSET
DECEMBER 12 2025......SUNRISE 7:10 AM CST SUNSET 4:20 PM CST
DECEMBER 13 2025......SUNRISE 7:11 AM CST SUNSET 4:21 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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