Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS43 KLOT 210632
CLIMDW
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
132 AM CDT THU AUG 21 2025
...................................
...THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR AUGUST 20 2025...
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)
YESTERDAY
MAXIMUM 77 8:13 AM 98 1947 82 -5 73
MINIMUM 70 5:34 AM 47 1950 66 4 60
AVERAGE 74 74 0 67
PRECIPITATION (IN)
YESTERDAY 0.00 1.47 1951 0.12 -0.12 0.00
MONTH TO DATE 2.81 2.59 0.22 2.86
SINCE JUN 1 14.84 10.15 4.69 12.61
SINCE JAN 1 24.41 22.63 1.78 28.59
DEGREE DAYS
HEATING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 9 25 -16 3
SINCE JUL 1 0 1 -1 0
COOLING
YESTERDAY 9 9 0 2
MONTH TO DATE 276 205 71 197
SINCE JUN 1 1044 780 264 871
SINCE JAN 1 1095 862 233 984
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION N (10)
AVERAGE WIND SPEED 11.7
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 3:00 AM
LOWEST 54 2:00 PM
AVERAGE 71
..........................................................
THE CHICAGO-MIDWAY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 82 99 1955
MINIMUM TEMPERATURE (F) 66 46 1950
SUNRISE AND SUNSET
AUGUST 21 2025........SUNRISE 6:06 AM CDT SUNSET 7:41 PM CDT
AUGUST 22 2025........SUNRISE 6:07 AM CDT SUNSET 7:40 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$