Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS43 KLOT 312134
CLIMDW
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
434 PM CDT SUN AUG 31 2025
...................................
...THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR AUGUST 31 2025...
VALID TODAY AS OF 0400 PM LOCAL TIME.
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)
TODAY
MAXIMUM 77 1:17 PM 99 1953 81 -4 85
MINIMUM 58 5:48 AM 46 1935 64 -6 63
AVERAGE 68 72 -4 74
PRECIPITATION (IN)
TODAY 0.00 1.62 1980 0.13 -0.13 0.00
MONTH TO DATE 3.22 3.99 -0.77 3.74
SINCE JUN 1 15.25 11.55 3.70 13.49
SINCE JAN 1 24.82 24.03 0.79 29.47
DEGREE DAYS
HEATING
TODAY 0 0 0 0
MONTH TO DATE 2 0 2 0
SINCE JUN 1 11 25 -14 3
SINCE JUL 1 2 1 1 0
COOLING
TODAY 3 8 -5 9
MONTH TO DATE 322 299 23 336
SINCE JUN 1 1090 874 216 1010
SINCE JAN 1 1141 956 185 1123
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (100)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION E (80)
AVERAGE WIND SPEED 3.2
SKY COVER
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 77 6:00 AM
LOWEST 44 11:00 AM
AVERAGE 61
..........................................................
THE CHICAGO-MIDWAY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 81 101 1953
MINIMUM TEMPERATURE (F) 64 45 1949
SUNRISE AND SUNSET
AUGUST 31 2025........SUNRISE 6:16 AM CDT SUNSET 7:25 PM CDT
SEPTEMBER 1 2025.....SUNRISE 6:17 AM CDT SUNSET 7:24 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$