660
CDUS43 KLOT 210640
CLIMDW
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
140 AM CDT SUN SEP 21 2025
...............................
..THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR SEPTEMBER 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 79 11:29 AM 95 2018 75 4 92
MINIMUM 69 5:23 AM 38 1937 57 12 71
1956
AVERAGE 74 66 8 82
PRECIPITATION (IN)
YESTERDAY 0.11 1.12 1967 0.09 0.02 0.02
MONTH TO DATE 0.37 1.87 -1.50 0.02
SINCE SEP 1 0.37 1.87 -1.50 0.02
SINCE JAN 1 25.19 25.90 -0.71 29.49
DEGREE DAYS
HEATING
YESTERDAY 0 2 -2 0
MONTH TO DATE 21 21 0 10
SINCE SEP 1 21 21 0 10
SINCE JUL 1 23 25 -2 10
COOLING
YESTERDAY 9 4 5 17
MONTH TO DATE 118 110 8 168
SINCE SEP 1 118 110 8 168
SINCE JAN 1 1259 1066 193 1291
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 5.1
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 82 9:00 PM
LOWEST 54 11:00 AM
AVERAGE 68
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THE CHICAGO-MIDWAY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 95 2017
MINIMUM TEMPERATURE (F) 57 40 1930
SUNRISE AND SUNSET
SEPTEMBER 21 2025.....SUNRISE 6:38 AM CDT SUNSET 6:49 PM CDT
SEPTEMBER 22 2025.....SUNRISE 6:39 AM CDT SUNSET 6:48 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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