902
CDUS43 KLOT 180640
CLIMDW
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
140 AM CDT THU SEP 18 2025
...............................
..THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR SEPTEMBER 17 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 84 1:14 PM 93 1955 76 8 85
MINIMUM 62 5:38 AM 39 1937 58 4 62
AVERAGE 73 67 6 74
PRECIPITATION (IN)
YESTERDAY 0.00 1.20 1978 0.09 -0.09 0.00
2023
MONTH TO DATE 0.26 1.60 -1.34 T
SINCE SEP 1 0.26 1.60 -1.34 T
SINCE JAN 1 25.08 25.63 -0.55 29.47
DEGREE DAYS
HEATING
YESTERDAY 0 2 -2 0
MONTH TO DATE 21 15 6 10
SINCE SEP 1 21 15 6 10
SINCE JUL 1 23 19 4 10
COOLING
YESTERDAY 8 4 4 9
MONTH TO DATE 84 98 -14 127
SINCE SEP 1 84 98 -14 127
SINCE JAN 1 1225 1054 171 1250
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (80)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION E (70)
AVERAGE WIND SPEED 4.7
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 84 5:00 AM
LOWEST 38 2:00 PM
AVERAGE 61
......................................................
THE CHICAGO-MIDWAY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 76 94 1955
MINIMUM TEMPERATURE (F) 58 39 1929
SUNRISE AND SUNSET
SEPTEMBER 18 2025.....SUNRISE 6:35 AM CDT SUNSET 6:55 PM CDT
SEPTEMBER 19 2025.....SUNRISE 6:36 AM CDT SUNSET 6:53 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page