Climatological Report (Daily)
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000
CDUS43 KLOT 240638
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
138 AM CDT TUE OCT 24 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR OCTOBER 23 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         54    939 PM  85    1963  60     -6       73
  MINIMUM         50   1159 PM  20    1981  41      9       41
  AVERAGE         52                        50      2       57

PRECIPITATION (IN)
  YESTERDAY        0.73          1.40 1957   0.10   0.63     0.00
  MONTH TO DATE    7.83                      2.31   5.52     1.67
  SINCE SEP 1      8.15                      5.52   2.63     3.43
  SINCE JAN 1     39.89                     30.65   9.24    30.41

SNOWFALL (IN)
  YESTERDAY        0.0           0.7  1929   0.0    0.0      0.0
  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       13                        15     -2        8
  MONTH TO DATE   75                       265   -190      150
  SINCE SEP 1    112                       370   -258      173
  SINCE JUL 1    117                       383   -266      173

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE   29                        10     19       24
  SINCE SEP 1    208                       102    106      189
  SINCE JAN 1    991                       842    149     1154
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    18   HIGHEST WIND DIRECTION     W (280)
  HIGHEST GUST SPEED    24   HIGHEST GUST DIRECTION     W (270)
  AVERAGE WIND SPEED     9.2


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 1.0


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  HEAVY RAIN
  RAIN
  LIGHT RAIN
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    96           100 AM
 LOWEST     71           600 PM
 AVERAGE    84

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   59        83      1963
 MINIMUM TEMPERATURE (F)   41        17      1981


SUNRISE AND SUNSET
OCTOBER 24 2017.......SUNRISE   715 AM CDT   SUNSET   556 PM CDT
OCTOBER 25 2017.......SUNRISE   716 AM CDT   SUNSET   555 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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