Climatological Report (Daily)
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000
CDUS43 KLOT 312137
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
437 PM CDT TUE OCT 31 2017


...................................

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR OCTOBER 31 2017...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         40    259 PM  84    1950  56    -16       61
  MINIMUM         34    703 AM  23    1873  39     -5       38
  AVERAGE         37                        47    -10       50

PRECIPITATION (IN)
  TODAY            0.00          2.26 1994   0.10  -0.10     0.00
  MONTH TO DATE    8.70                      3.15   5.55     3.77
  SINCE SEP 1      9.02                      6.36   2.66     5.53
  SINCE JAN 1     40.76                     31.49   9.27    32.51

SNOWFALL (IN)
  TODAY            0.0           T    1993   0.0    0.0      0.0
                                      1955
                                      1926
  MONTH TO DATE    T                         0.2   -0.2      0.0
  SINCE SEP 1      T                         0.2   -0.2      0.0
  SINCE JUL 1      T                         0.2   -0.2      0.0

DEGREE DAYS
 HEATING
  TODAY           28                        18     10       15
  MONTH TO DATE  251                       397   -146      266
  SINCE SEP 1    288                       502   -214      289
  SINCE JUL 1    293                       515   -222      289

 COOLING
  TODAY            0                         0      0        0
  MONTH TO DATE   29                        11     18       24
  SINCE SEP 1    208                       103    105      189
  SINCE JAN 1    991                       843    148     1154
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    26   HIGHEST WIND DIRECTION     W (290)
  HIGHEST GUST SPEED    33   HIGHEST GUST DIRECTION     W (280)
  AVERAGE WIND SPEED    14.5


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.9


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    56           100 AM
 LOWEST     47           500 AM
 AVERAGE    52

..........................................................


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   56        81      1950
 MINIMUM TEMPERATURE (F)   38        21      1879


SUNRISE AND SUNSET
OCTOBER 31 2017.......SUNRISE   723 AM CDT   SUNSET   547 PM CDT
NOVEMBER  1 2017......SUNRISE   725 AM CDT   SUNSET   545 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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