858
CDUS43 KLOT 180640
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
140 AM CDT TUE AUG 18 2026
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR AUGUST 17 2026
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 80 4:56 PM 98 1947 83 -3 81
1988
MINIMUM 67 5:29 AM 48 1976 65 2 69
AVERAGE 74 74 0 75
PRECIPITATION (IN)
YESTERDAY T 2.60 1979 0.15 -0.15 1.69
MONTH TO DATE 4.10 2.39 1.71 2.80
SINCE JUN 1 14.46 10.20 4.26 10.72
SINCE JAN 1 30.05 24.85 5.20 20.22
SNOWFALL (IN)
YESTERDAY 0.0 0.0 MM 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE JUN 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 11 33 -22 13
SINCE JUL 1 0 2 -2 0
COOLING
YESTERDAY 9 9 0 10
MONTH TO DATE 179 165 14 210
SINCE JUN 1 734 690 44 899
SINCE JAN 1 812 760 52 933
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION N (10)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION N (360)
AVERAGE WIND SPEED 7.0
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 5:00 AM
LOWEST 48 5:00 PM
AVERAGE 68
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 83 98 1947
MINIMUM TEMPERATURE (F) 65 49 1963
SUNRISE AND SUNSET
AUGUST 18 2026........SUNRISE 6:03 AM CDT SUNSET 7:47 PM CDT
AUGUST 19 2026........SUNRISE 6:04 AM CDT SUNSET 7:46 PM CDT
- 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