Climatological Report (Daily)
Issued by NWS
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CDUS43 KLOT 172139
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
439 PM CDT FRI OCT 17 2025
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR OCTOBER 17 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 74 2:59 PM 86 1950 62 12 64
MINIMUM 57 5:26 AM 26 1948 45 12 38
AVERAGE 66 54 12 51
PRECIPITATION (IN)
TODAY 0.00 3.61 1988 0.11 -0.11 0.00
MONTH TO DATE 1.55 1.91 -0.36 0.30
SINCE SEP 1 2.04 5.10 -3.06 1.62
SINCE JAN 1 24.49 31.81 -7.32 28.48
SNOWFALL (IN)
TODAY 0.0 T 1930 0.0 0.0 0.0
1976
2022
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 12 -12 14
MONTH TO DATE 59 153 -94 98
SINCE SEP 1 91 230 -139 113
SINCE JUL 1 96 236 -140 113
COOLING
TODAY 1 0 1 0
MONTH TO DATE 56 12 44 13
SINCE SEP 1 222 128 94 203
SINCE JAN 1 1214 1000 214 1189
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 10.1
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 60 6:00 AM
LOWEST 48 3:00 PM
AVERAGE 54
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 62 87 1950
MINIMUM TEMPERATURE (F) 45 20 1948
SUNRISE AND SUNSET
OCTOBER 17 2025.......SUNRISE 7:07 AM CDT SUNSET 6:06 PM CDT
OCTOBER 18 2025.......SUNRISE 7:08 AM CDT SUNSET 6:05 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$