053
CDUS43 KLOT 170635
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1235 AM CST WED DEC 17 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 16 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 40 3:19 PM 66 2021 36 4 51
MINIMUM 17 6:23 AM -12 1951 24 -7 37
AVERAGE 29 30 -1 44
PRECIPITATION (IN)
YESTERDAY 0.00 1.67 1921 0.06 -0.06 0.03
MONTH TO DATE 0.72 1.15 -0.43 0.41
SINCE DEC 1 0.72 1.15 -0.43 0.41
SINCE JAN 1 28.44 36.90 -8.46 33.40
SNOWFALL (IN)
YESTERDAY 0.0 4.8 2008 0.3 -0.3 0.0
MONTH TO DATE 6.9 3.6 3.3 0.2
SINCE DEC 1 6.9 3.6 3.3 0.2
SINCE JUL 1 17.3 5.6 11.7 3.1
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 36 35 1 21
MONTH TO DATE 690 520 170 567
SINCE DEC 1 690 520 170 567
SINCE JUL 1 1659 1671 -12 1334
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 23 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION SW (240)
AVERAGE WIND SPEED 10.7
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 77 5:00 AM
LOWEST 57 3:00 PM
AVERAGE 67
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THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 36 60 1977
MINIMUM TEMPERATURE (F) 24 -7 1951
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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