725
CDUS43 KLOT 182235
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
435 PM CST THU DEC 18 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 18 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 51 1:11 PM 62 1877 36 15 35
MINIMUM 36 12:12 AM -11 1983 24 12 25
AVERAGE 44 30 14 30
PRECIPITATION (IN)
TODAY 0.19 1.41 2002 0.06 0.13 T
MONTH TO DATE 0.91 1.28 -0.37 0.41
SINCE DEC 1 0.91 1.28 -0.37 0.41
SINCE JAN 1 28.63 37.03 -8.40 33.40
SNOWFALL (IN)
TODAY 0.0 6.7 1929 0.3 -0.3 T
MONTH TO DATE 6.9 4.1 2.8 0.2
SINCE DEC 1 6.9 4.1 2.8 0.2
SINCE JUL 1 17.3 6.1 11.2 3.1
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 21 35 -14 35
MONTH TO DATE 738 590 148 631
SINCE DEC 1 738 590 148 631
SINCE JUL 1 1707 1741 -34 1398
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 30 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 48 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 17.4
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 7:00 AM
LOWEST 68 1:00 AM
AVERAGE 83
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 36 64 1877
MINIMUM TEMPERATURE (F) 24 -14 1983
SUNRISE AND SUNSET
DECEMBER 18 2025......SUNRISE 7:15 AM CST SUNSET 4:22 PM CST
DECEMBER 19 2025......SUNRISE 7:15 AM CST SUNSET 4:23 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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