825
CDUS43 KLOT 122234
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
434 PM CST FRI DEC 12 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 12 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 31 1:53 PM 61 1877 37 -6 15
MINIMUM 20 7:13 AM -8 2000 25 -5 4
AVERAGE 26 31 -5 10
PRECIPITATION (IN)
TODAY 0.00 1.76 1972 0.06 -0.06 0.00
MONTH TO DATE 0.72 0.89 -0.17 T
SINCE DEC 1 0.72 0.89 -0.17 T
SINCE JAN 1 28.44 36.64 -8.20 32.99
SNOWFALL (IN)
TODAY 0.0 11.3 1903 0.2 -0.2 0.0
MONTH TO DATE 6.9 2.6 4.3 0.2
SINCE DEC 1 6.9 2.6 4.3 0.2
SINCE JUL 1 17.3 4.6 12.7 3.1
SNOW DEPTH 1
DEGREE DAYS
HEATING
TODAY 39 34 5 55
MONTH TO DATE 489 383 106 441
SINCE DEC 1 489 383 106 441
SINCE JUL 1 1458 1534 -76 1208
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 14 HIGHEST WIND DIRECTION W (280)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION SW (240)
AVERAGE WIND SPEED 5.3
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 77 5:00 AM
LOWEST 61 2:00 PM
AVERAGE 69
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 37 67 1975
MINIMUM TEMPERATURE (F) 25 -13 1903
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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