505
CDUS43 KLOT 180637
CLIMDW
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
137 AM CDT MON AUG 18 2025
...............................
..THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR AUGUST 17 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1928 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 84 11:34 AM 99 1988 83 1 83
MINIMUM 70 2:49 AM 48 1976 67 3 70
AVERAGE 77 75 2 77
PRECIPITATION (IN)
YESTERDAY 0.70 2.60 1979 0.14 0.56 0.46
MONTH TO DATE 1.44 2.20 -0.76 2.85
SINCE JUN 1 13.47 9.76 3.71 12.60
SINCE JAN 1 23.04 22.24 0.80 28.58
DEGREE DAYS
HEATING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 9 25 -16 3
SINCE JUL 1 0 1 -1 0
COOLING
YESTERDAY 12 10 2 12
MONTH TO DATE 240 177 63 180
SINCE JUN 1 1008 752 256 854
SINCE JAN 1 1059 834 225 967
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 109 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 53 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 11.9
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
HEAVY RAIN
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 91 2:00 AM
LOWEST 67 5:00 PM
AVERAGE 79
......................................................
THE CHICAGO-MIDWAY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 83 99 1936
MINIMUM TEMPERATURE (F) 66 49 1963
SUNRISE AND SUNSET
AUGUST 18 2025........SUNRISE 6:03 AM CDT SUNSET 7:46 PM CDT
AUGUST 19 2025........SUNRISE 6:04 AM CDT SUNSET 7:45 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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