Climatological Report (Daily)
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CDUS43 KLOT 180633
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
133 AM CDT WED OCT 18 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR OCTOBER 17 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         70    306 PM  86    1950  62      8       82
  MINIMUM         49    612 AM  26    1948  42      7       67
  AVERAGE         60                        52      8       75

PRECIPITATION (IN)
  YESTERDAY        0.00          3.61 1988   0.10  -0.10     0.00
  MONTH TO DATE    6.73                      1.69   5.04     1.65
  SINCE SEP 1      7.05                      4.90   2.15     3.41
  SINCE JAN 1     38.79                     30.03   8.76    30.39

SNOWFALL (IN)
  YESTERDAY        0.0           T    1976   0.0    0.0      0.0
                                      1930
  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      T                         0.1   -0.1      0.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY        5                        13     -8        0
  MONTH TO DATE   48                       180   -132       88
  SINCE SEP 1     85                       285   -200      111
  SINCE JUL 1     90                       298   -208      111

 COOLING
  YESTERDAY        0                         0      0       10
  MONTH TO DATE   25                        10     15       23
  SINCE SEP 1    204                       102    102      188
  SINCE JAN 1    987                       842    145     1153
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    23   HIGHEST WIND DIRECTION    SW (220)
  HIGHEST GUST SPEED    29   HIGHEST GUST DIRECTION    SW (220)
  AVERAGE WIND SPEED    11.9


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.2


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    66          1200 AM
 LOWEST     31           200 PM
 AVERAGE    49

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   62        87      1950
 MINIMUM TEMPERATURE (F)   42        20      1948


SUNRISE AND SUNSET
OCTOBER 18 2017.......SUNRISE   708 AM CDT   SUNSET   605 PM CDT
OCTOBER 19 2017.......SUNRISE   709 AM CDT   SUNSET   603 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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