697
CDUS43 KLOT 310636
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
136 AM CDT THU JUL 31 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR JULY 30 2025
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)
YESTERDAY
MAXIMUM 80 12:19 AM 102 1916 84 -4 90
MINIMUM 68 11:59 PM 50 1984 67 1 70
AVERAGE 74 75 -1 80
PRECIPITATION (IN)
YESTERDAY 0.67 2.43 1979 0.14 0.53 0.00
MONTH TO DATE 4.28 3.58 0.70 5.89
SINCE JUN 1 7.91 7.68 0.23 8.99
SINCE JAN 1 17.41 22.33 -4.92 24.26
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 T
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 13 31 -18 6
SINCE JUL 1 0 0 0 0
COOLING
YESTERDAY 9 10 -1 15
MONTH TO DATE 388 317 71 299
SINCE JUN 1 684 516 168 577
SINCE JAN 1 718 586 132 657
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION NE (40)
AVERAGE WIND SPEED 11.7
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HEAVY RAIN
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 9:00 PM
LOWEST 69 4:00 AM
AVERAGE 83
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 84 99 1945
2006
MINIMUM TEMPERATURE (F) 67 51 1984
SUNRISE AND SUNSET
JULY 31 2025..........SUNRISE 5:44 AM CDT SUNSET 8:11 PM CDT
AUGUST 1 2025........SUNRISE 5:45 AM CDT SUNSET 8:10 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