Climatological Report (Daily)
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929
CDUS43 KLOT 200646
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
146 AM CDT SUN AUG 20 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR AUGUST 19 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         86    305 PM  99    1983  82      4       84
                                      1947
  MINIMUM         63    539 AM  51    1992  63      0       66
  AVERAGE         75                        72      3       75

PRECIPITATION (IN)
  YESTERDAY        0.00          2.07 1921   0.16  -0.16     0.07
  MONTH TO DATE    2.02                      3.14  -1.12     1.87
  SINCE JUN 1     13.14                     10.29   2.85    10.95
  SINCE JAN 1     31.25                     23.37   7.88    24.59

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 JUN 1      T                         0.0    0.0      0.0
  SINCE JUL 1      T                         0.0    0.0      0.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    3                         0      3        0
  SINCE JUN 1      6                        52    -46       13
  SINCE JUL 1      3                         4     -1        0

 COOLING
  YESTERDAY       10                         8      2       10
  MONTH TO DATE  146                       159    -13      241
  SINCE JUN 1    682                       607     75      789
  SINCE JAN 1    715                       661     54      863
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    13   HIGHEST WIND DIRECTION     E (110)
  HIGHEST GUST SPEED    17   HIGHEST GUST DIRECTION     E (100)
  AVERAGE WIND SPEED     4.8


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    90           500 AM
 LOWEST     32           300 PM
 AVERAGE    61

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   82        98      1947
 MINIMUM TEMPERATURE (F)   63        47      1950


SUNRISE AND SUNSET
AUGUST 20 2017........SUNRISE   605 AM CDT   SUNSET   744 PM CDT
AUGUST 21 2017........SUNRISE   606 AM CDT   SUNSET   742 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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