Climatological Report (Daily)
Issued by NWS
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141
CDUS43 KLOT 212141
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
441 PM CDT MON JUL 21 2025
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR JULY 21 2025...
VALID TODAY AS OF 0400 PM LOCAL TIME.
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)
TODAY
MAXIMUM 82 2:33 PM 103 1901 85 -3 84
MINIMUM 63 2:31 AM 51 1970 67 -4 66
AVERAGE 73 76 -3 75
PRECIPITATION (IN)
TODAY 0.00 1.78 1999 0.13 -0.13 0.00
MONTH TO DATE 3.48 2.42 1.06 5.55
SINCE JUN 1 7.11 6.52 0.59 8.65
SINCE JAN 1 16.61 21.17 -4.56 23.92
SNOWFALL (IN)
TODAY 0.0 T 1963 0.0 0.0 0.0
1978
2017
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
TODAY 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
TODAY 8 11 -3 10
MONTH TO DATE 252 222 30 209
SINCE JUN 1 548 421 127 487
SINCE JAN 1 582 491 91 567
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION NE (60)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION NE (50)
AVERAGE WIND SPEED 8.8
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 5:00 AM
LOWEST 41 2:00 PM
AVERAGE 67
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 85 101 1934
1991
MINIMUM TEMPERATURE (F) 67 49 1947
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.
$$