Climatological Report (Daily)
Issued by NWS

Home |  Current Version |  Previous Version |  Text Only |  Print | Product List |  Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
200
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.




$$