Climatological Report (Daily)
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CDUS43 KLOT 190634
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
133 AM CDT TUE SEP 19 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 18 2017...

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)
 YESTERDAY
  MAXIMUM         77    103 PM  94    1955  74      3       81
  MINIMUM         58    614 AM  40    1903  53      5       57
                                      1901
                                      1889
  AVERAGE         68                        64      4       69

PRECIPITATION (IN)
  YESTERDAY        0.00          2.41 2015   0.10  -0.10     0.00
  MONTH TO DATE    0.25                      1.96  -1.71     0.59
  SINCE SEP 1      0.25                      1.96  -1.71     0.59
  SINCE JAN 1     31.99                     27.09   4.90    27.57

SNOWFALL (IN)
  YESTERDAY        0.0           0.0    MM   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      T                         0.0    0.0      0.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY        0                         4     -4        0
  MONTH TO DATE   29                        36     -7        1
  SINCE SEP 1     29                        36     -7        1
  SINCE JUL 1     34                        49    -15        1

 COOLING
  YESTERDAY        3                         2      1        4
  MONTH TO DATE   57                        74    -17      116
  SINCE SEP 1     57                        74    -17      116
  SINCE JAN 1    840                       814     26     1081
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    14   HIGHEST WIND DIRECTION    NE (50)
  HIGHEST GUST SPEED    17   HIGHEST GUST DIRECTION    NE (40)
  AVERAGE WIND SPEED     7.5


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.5


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  NO SIGNIFICANT WEATHER WAS OBSERVED.


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    80           500 AM
 LOWEST     43           100 PM
 AVERAGE    62

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   74        93      1955
 MINIMUM TEMPERATURE (F)   53        40      1991


SUNRISE AND SUNSET
SEPTEMBER 19 2017.....SUNRISE   636 AM CDT   SUNSET   654 PM CDT
SEPTEMBER 20 2017.....SUNRISE   637 AM CDT   SUNSET   652 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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