006
CDUS43 KLOT 152239
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
439 PM CST MON DEC 15 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 15 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 21 3:59 PM 66 2021 37 -16 45
MINIMUM 3 2:17 AM -12 1901 25 -22 38
AVERAGE 12 30 -18 42
PRECIPITATION (IN)
TODAY 0.00 1.10 1971 0.06 -0.06 0.05
MONTH TO DATE 0.72 1.09 -0.37 0.38
SINCE DEC 1 0.72 1.09 -0.37 0.38
SINCE JAN 1 28.44 36.84 -8.40 33.37
SNOWFALL (IN)
TODAY 0.0 8.0 1987 0.2 -0.2 0.0
MONTH TO DATE 6.9 3.3 3.6 0.2
SINCE DEC 1 6.9 3.3 3.6 0.2
SINCE JUL 1 17.3 5.3 12.0 3.1
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 53 34 19 23
MONTH TO DATE 654 485 169 546
SINCE DEC 1 654 485 169 546
SINCE JUL 1 1623 1636 -13 1313
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
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WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION SW (230)
AVERAGE WIND SPEED 12.8
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 62 12:00 AM
LOWEST 49 11:00 AM
AVERAGE 56
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THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 36 66 2021
MINIMUM TEMPERATURE (F) 24 -12 1951
SUNRISE AND SUNSET
DECEMBER 15 2025......SUNRISE 7:13 AM CST SUNSET 4:21 PM CST
DECEMBER 16 2025......SUNRISE 7:13 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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