Climatological Report (Daily)
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000
CDUS43 KLOT 202134
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
432 PM CDT SUN AUG 20 2017


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR AUGUST 20 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         90    145 PM  98    1947  82      8       80
  MINIMUM         63    504 AM  47    1950  63      0       63
  AVERAGE         77                        72      5       72

PRECIPITATION (IN)
  TODAY            0.00          1.47 1951   0.16  -0.16     0.47
  MONTH TO DATE    2.02                      3.30  -1.28     2.34
  SINCE JUN 1     13.14                     10.45   2.69    11.42
  SINCE JAN 1     31.25                     23.53   7.72    25.06

SNOWFALL (IN)
  TODAY            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

DEGREE DAYS
 HEATING
  TODAY            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
  TODAY           12                         7      5        7
  MONTH TO DATE  158                       166     -8      248
  SINCE JUN 1    694                       614     80      796
  SINCE JAN 1    727                       668     59      870
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    13   HIGHEST WIND DIRECTION     W (260)
  HIGHEST GUST SPEED    17   HIGHEST GUST DIRECTION     W (250)
  AVERAGE WIND SPEED     4.7


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.5


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    78           300 AM
 LOWEST     43           200 PM
 AVERAGE    61

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


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   82        99      1955
 MINIMUM TEMPERATURE (F)   63        46      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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