919
CDUS43 KLOT 170633
CLIMDW
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
133 AM CDT WED SEP 17 2025
...............................
..THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR SEPTEMBER 16 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 83 2:09 PM 93 1931 77 6 90
MINIMUM 65 5:05 AM 39 1984 59 6 67
AVERAGE 74 68 6 79
PRECIPITATION (IN)
YESTERDAY 0.00 1.70 1980 0.08 -0.08 0.00
MONTH TO DATE 0.26 1.51 -1.25 T
SINCE SEP 1 0.26 1.51 -1.25 T
SINCE JAN 1 25.08 25.54 -0.46 29.47
DEGREE DAYS
HEATING
YESTERDAY 0 2 -2 0
MONTH TO DATE 21 13 8 10
SINCE SEP 1 21 13 8 10
SINCE JUL 1 23 17 6 10
COOLING
YESTERDAY 9 4 5 14
MONTH TO DATE 76 94 -18 118
SINCE SEP 1 76 94 -18 118
SINCE JAN 1 1217 1050 167 1241
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION E (80)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION E (80)
AVERAGE WIND SPEED 5.5
SKY COVER
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 79 2:00 AM
LOWEST 38 1:00 PM
AVERAGE 59
......................................................
THE CHICAGO-MIDWAY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 76 93 1955
MINIMUM TEMPERATURE (F) 58 39 1937
SUNRISE AND SUNSET
SEPTEMBER 17 2025.....SUNRISE 6:34 AM CDT SUNSET 6:56 PM CDT
SEPTEMBER 18 2025.....SUNRISE 6:35 AM CDT SUNSET 6:55 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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