180
CDUS43 KLOT 272139
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
439 PM CDT MON OCT 27 2025
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR OCTOBER 27 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 57 11:57 AM 83 1927 58 -1 59
MINIMUM 45 5:58 AM 24 1942 42 3 37
AVERAGE 51 50 1 48
PRECIPITATION (IN)
TODAY 0.00 1.56 1947 0.11 -0.11 0.00
MONTH TO DATE 2.53 3.01 -0.48 1.15
SINCE SEP 1 3.02 6.20 -3.18 2.47
SINCE JAN 1 25.47 32.91 -7.44 29.33
SNOWFALL (IN)
TODAY 0.0 2.7 1967 0.0 0.0 0.0
MONTH TO DATE 0.0 0.1 -0.1 0.0
SINCE SEP 1 0.0 0.1 -0.1 0.0
SINCE JUL 1 0.0 0.1 -0.1 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 14 16 -2 17
MONTH TO DATE 199 291 -92 176
SINCE SEP 1 231 368 -137 191
SINCE JUL 1 236 374 -138 191
COOLING
TODAY 0 0 0 0
MONTH TO DATE 57 12 45 16
SINCE SEP 1 223 128 95 206
SINCE JAN 1 1215 1000 215 1192
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WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION NE (50)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION NE (60)
AVERAGE WIND SPEED 10.5
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 83 3:00 AM
LOWEST 42 11:00 AM
AVERAGE 63
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 57 80 1999
MINIMUM TEMPERATURE (F) 41 19 1925
SUNRISE AND SUNSET
OCTOBER 27 2025.......SUNRISE 7:18 AM CDT SUNSET 5:52 PM CDT
OCTOBER 28 2025.......SUNRISE 7:20 AM CDT SUNSET 5:50 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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