389
CDUS43 KLOT 210650
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
150 AM CDT MON JUL 21 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR JULY 20 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 75 12:12 AM 101 1980 85 -10 81
MINIMUM 66 11:59 PM 53 1970 67 -1 63
AVERAGE 71 76 -5 72
PRECIPITATION (IN)
YESTERDAY T 3.03 1978 0.12 -0.12 0.00
MONTH TO DATE 3.48 2.29 1.19 5.55
SINCE JUN 1 7.11 6.39 0.72 8.65
SINCE JAN 1 16.61 21.04 -4.43 23.92
SNOWFALL (IN)
YESTERDAY 0.0 T 1978 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 6 11 -5 7
MONTH TO DATE 244 211 33 199
SINCE JUN 1 540 410 130 477
SINCE JAN 1 574 480 94 557
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WIND (MPH)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NE (40)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION NE (50)
AVERAGE WIND SPEED 10.8
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 4:00 AM
LOWEST 59 6:00 PM
AVERAGE 78
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THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 85 103 1901
MINIMUM TEMPERATURE (F) 67 51 1970
SUNRISE AND SUNSET
JULY 21 2025..........SUNRISE 5:35 AM CDT SUNSET 8:21 PM CDT
JULY 22 2025..........SUNRISE 5:36 AM CDT SUNSET 8:20 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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