899
CDUS43 KLOT 180651
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1251 AM CST MON DEC 18 2023
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 17 2023
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2023
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 44 6:57 AM 60 1977 36 8 26
MINIMUM 36 11:59 PM -7 1951 24 12 21
AVERAGE 40 30 10 24
PRECIPITATION (IN)
YESTERDAY T 1.28 1921 0.07 -0.07 T
MONTH TO DATE 1.71 1.22 0.49 2.07
SINCE DEC 1 1.71 1.22 0.49 2.07
SINCE JAN 1 32.47 36.97 -4.50 31.90
SNOWFALL (IN)
YESTERDAY 0.0 4.6 1951 0.2 -0.2 T
MONTH TO DATE 0.3 3.8 -3.5 1.9
SINCE DEC 1 0.3 3.8 -3.5 1.9
SINCE JUL 1 3.0 5.8 -2.8 3.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 25 35 -10 41
MONTH TO DATE 434 555 -121 497
SINCE DEC 1 434 555 -121 497
SINCE JUL 1 1398 1706 -308 1562
COOLING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 1145 1003 142 1174
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION W (250)
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION W (290)
AVERAGE WIND SPEED 9.6
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 12:00 AM
LOWEST 79 8:00 PM
AVERAGE 88
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THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 36 62 1877
MINIMUM TEMPERATURE (F) 24 -11 1983
SUNRISE AND SUNSET
DECEMBER 18 2023......SUNRISE 7:14 AM CST SUNSET 4:22 PM CST
DECEMBER 19 2023......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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