Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS43 KLOT 312134
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
434 PM CDT SUN AUG 31 2025
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR AUGUST 31 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 75 2:44 PM 99 1953 80 -5 84
MINIMUM 54 5:44 AM 47 1872 63 -9 62
AVERAGE 65 72 -7 73
PRECIPITATION (IN)
TODAY 0.00 1.24 1977 0.14 -0.14 0.00
MONTH TO DATE 5.03 4.25 0.78 2.60
SINCE JUN 1 12.95 12.06 0.89 11.59
SINCE JAN 1 22.45 26.71 -4.26 26.86
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 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 5 0 5 0
SINCE JUN 1 18 33 -15 6
SINCE JUL 1 5 2 3 0
COOLING
TODAY 0 7 -7 8
MONTH TO DATE 269 277 -8 312
SINCE JUN 1 958 802 156 906
SINCE JAN 1 992 872 120 986
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (80)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION E (100)
AVERAGE WIND SPEED 5.3
SKY COVER
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 80 6:00 AM
LOWEST 49 10:00 AM
AVERAGE 65
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 101 1953
MINIMUM TEMPERATURE (F) 62 45 1949
SUNRISE AND SUNSET
AUGUST 31 2025........SUNRISE 6:16 AM CDT SUNSET 7:26 PM CDT
SEPTEMBER 1 2025.....SUNRISE 6:18 AM CDT SUNSET 7:25 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$