Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS43 KLOT 010638
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
138 AM CDT WED OCT 01 2025
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 30 2025...
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)
YESTERDAY
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)
YESTERDAY 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)
YESTERDAY 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
YESTERDAY 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
YESTERDAY 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 15 HIGHEST WIND DIRECTION NE (40)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION NE (30)
AVERAGE WIND SPEED 7.5
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 5:00 AM
LOWEST 42 3:00 PM
AVERAGE 68
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 92 1971
MINIMUM TEMPERATURE (F) 51 32 1886
1974
SUNRISE AND SUNSET
OCTOBER 1 2025.......SUNRISE 6:49 AM CDT SUNSET 6:33 PM CDT
OCTOBER 2 2025.......SUNRISE 6:50 AM CDT SUNSET 6:31 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$