Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS43 KLOT 302135
CLIMDW
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
435 PM CDT TUE SEP 30 2025
...................................
...THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR SEPTEMBER 30 2025...
VALID TODAY AS OF 0400 PM LOCAL TIME.
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)
TODAY
MAXIMUM 83 2:27 PM 92 1971 71 12 78
MINIMUM 66 4:47 AM 34 1984 53 13 64
AVERAGE 75 62 13 71
PRECIPITATION (IN)
TODAY 0.00 0.76 1977 0.09 -0.09 0.00
MONTH TO DATE 0.56 2.77 -2.21 1.89
SINCE SEP 1 0.56 2.77 -2.21 1.89
SINCE JAN 1 25.38 26.80 -1.42 31.36
DEGREE DAYS
HEATING
TODAY 0 5 -5 0
MONTH TO DATE 21 59 -38 10
SINCE SEP 1 21 59 -38 10
SINCE JUL 1 23 63 -40 10
COOLING
TODAY 10 2 8 6
MONTH TO DATE 204 136 68 219
SINCE SEP 1 204 136 68 219
SINCE JAN 1 1345 1092 253 1342
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION E (80)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION E (90)
AVERAGE WIND SPEED 5.8
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 84 5:00 AM
LOWEST 34 3:00 PM
AVERAGE 59
..........................................................
THE CHICAGO-MIDWAY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 70 92 1971
MINIMUM TEMPERATURE (F) 53 32 1974
SUNRISE AND SUNSET
SEPTEMBER 30 2025.....SUNRISE 6:47 AM CDT SUNSET 6:34 PM CDT
OCTOBER 1 2025.......SUNRISE 6:48 AM CDT SUNSET 6:32 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$