670
CDUS43 KLOT 172136
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
436 PM CDT MON AUG 17 2026
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR AUGUST 17 2026
VALID TODAY AS OF 0400 PM LOCAL TIME.
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)
TODAY
MAXIMUM 78 2:56 PM 98 1947 83 -5 81
1988
MINIMUM 67 5:29 AM 48 1976 65 2 69
AVERAGE 73 74 -1 75
PRECIPITATION (IN)
TODAY 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)
TODAY 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
TODAY 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
TODAY 8 9 -1 10
MONTH TO DATE 178 165 13 210
SINCE JUN 1 733 690 43 899
SINCE JAN 1 811 760 51 933
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION N (10)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION N (360)
AVERAGE WIND SPEED 7.1
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 5:00 AM
LOWEST 58 3:00 PM
AVERAGE 73
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 83 98 1947
MINIMUM TEMPERATURE (F) 65 49 1963
SUNRISE AND SUNSET
AUGUST 17 2026........SUNRISE 6:02 AM CDT SUNSET 7:49 PM CDT
AUGUST 18 2026........SUNRISE 6:03 AM CDT SUNSET 7:47 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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