828
CDUS43 KLOT 302135
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
435 PM CDT TUE SEP 30 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 30 2025
VALID TODAY AS OF 0400 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
TODAY
MAXIMUM 82 12:48 PM 92 1971 70 12 79
MINIMUM 63 3:40 AM 29 1984 51 12 63
AVERAGE 73 60 13 71
PRECIPITATION (IN)
TODAY 0.00 1.27 1896 0.10 -0.10 0.00
MONTH TO DATE 0.49 3.19 -2.70 1.32
SINCE SEP 1 0.49 3.19 -2.70 1.32
SINCE JAN 1 22.94 29.90 -6.96 28.18
SNOWFALL (IN)
TODAY 0.0 T 2006 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE SEP 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 0 6 -6 0
MONTH TO DATE 32 76 -44 15
SINCE SEP 1 32 76 -44 15
SINCE JUL 1 37 82 -45 15
COOLING
TODAY 8 2 6 6
MONTH TO DATE 166 116 50 190
SINCE SEP 1 166 116 50 190
SINCE JAN 1 1158 988 170 1176
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NE (50)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION NE (30)
AVERAGE WIND SPEED 6.4
SKY COVER
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 5:00 AM
LOWEST 42 3:00 PM
AVERAGE 68
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 92 1971
MINIMUM TEMPERATURE (F) 51 32 1886
1974
SUNRISE AND SUNSET
SEPTEMBER 30 2025.....SUNRISE 6:48 AM CDT SUNSET 6:34 PM CDT
OCTOBER 1 2025.......SUNRISE 6:49 AM CDT SUNSET 6:33 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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