790
CDUS43 KLOT 202234
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
434 PM CST SAT DEC 20 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 20 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 40 3:16 PM 67 1877 35 5 35
MINIMUM 24 1:06 AM -9 1963 23 1 21
AVERAGE 32 29 3 28
PRECIPITATION (IN)
TODAY T 1.67 1895 0.06 -0.06 0.08
MONTH TO DATE 0.91 1.41 -0.50 0.58
SINCE DEC 1 0.91 1.41 -0.50 0.58
SINCE JAN 1 28.63 37.16 -8.53 33.57
SNOWFALL (IN)
TODAY 0.0 11.0 1960 0.2 -0.2 1.7
MONTH TO DATE 7.0 4.5 2.5 2.4
SINCE DEC 1 7.0 4.5 2.5 2.4
SINCE JUL 1 17.4 6.5 10.9 5.3
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 33 36 -3 37
MONTH TO DATE 829 662 167 704
SINCE DEC 1 829 662 167 704
SINCE JUL 1 1798 1813 -15 1471
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 23 HIGHEST WIND DIRECTION SW (210)
HIGHEST GUST SPEED 36 HIGHEST GUST DIRECTION SW (230)
AVERAGE WIND SPEED 14.2
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 71 1:00 AM
LOWEST 56 8:00 AM
AVERAGE 64
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 35 62 1967
MINIMUM TEMPERATURE (F) 23 -14 1989
SUNRISE AND SUNSET
DECEMBER 20 2025......SUNRISE 7:16 AM CST SUNSET 4:23 PM CST
DECEMBER 21 2025......SUNRISE 7:16 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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page