Climatological Report (Daily)
Issued by NWS
Issued by NWS
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939
CDUS43 KLOT 200643
CLIMDW
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
143 AM CDT WED AUG 20 2025
...................................
...THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR AUGUST 19 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 80 12:43 PM 99 1947 83 -3 77
1983
MINIMUM 72 11:59 PM 49 1933 66 6 64
AVERAGE 76 74 2 71
PRECIPITATION (IN)
YESTERDAY 0.02 1.39 2007 0.13 -0.11 0.00
MONTH TO DATE 1.93 2.47 -0.54 2.86
SINCE JUN 1 13.96 10.03 3.93 12.61
SINCE JAN 1 23.53 22.51 1.02 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 11 9 2 6
MONTH TO DATE 267 196 71 195
SINCE JUN 1 1035 771 264 869
SINCE JAN 1 1086 853 233 982
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION N (340)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION NE (30)
AVERAGE WIND SPEED 8.1
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 91 2:00 AM
LOWEST 67 4:00 PM
AVERAGE 79
..........................................................
THE CHICAGO-MIDWAY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 82 98 1947
MINIMUM TEMPERATURE (F) 66 47 1950
SUNRISE AND SUNSET
AUGUST 20 2025........SUNRISE 6:05 AM CDT SUNSET 7:43 PM CDT
AUGUST 21 2025........SUNRISE 6:06 AM CDT SUNSET 7:41 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$