Climatological Report (Daily)
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CDUS43 KLOT 080632
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
132 AM CDT FRI SEP 8 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 7 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         71    321 PM 100    1960  78     -7       89
                                      1939
  MINIMUM         52    614 AM  42    1986  58     -6       74
  AVERAGE         62                        68     -6       82

PRECIPITATION (IN)
  YESTERDAY        0.00          1.79 1980   0.11  -0.11     0.39
  MONTH TO DATE    0.25                      0.81  -0.56     0.39
  SINCE SEP 1      0.25                      0.81  -0.56     0.39
  SINCE JAN 1     31.99                     25.94   6.05    27.37

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        3                         1      2        0
  MONTH TO DATE   20                         7     13        0
  SINCE SEP 1     20                         7     13        0
  SINCE JUL 1     25                        20      5        0

 COOLING
  YESTERDAY        0                         5     -5       17
  MONTH TO DATE   13                        37    -24       57
  SINCE SEP 1     13                        37    -24       57
  SINCE JAN 1    796                       777     19     1022
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    21   HIGHEST WIND DIRECTION     W (270)
  HIGHEST GUST SPEED    28   HIGHEST GUST DIRECTION     W (290)
  AVERAGE WIND SPEED     8.4


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    83           600 AM
 LOWEST     30           400 PM
 AVERAGE    57

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   78        96      1960
                                             1959
                                             1933
 MINIMUM TEMPERATURE (F)   58        43      1986


SUNRISE AND SUNSET
SEPTEMBER  8 2017.....SUNRISE   625 AM CDT   SUNSET   713 PM CDT
SEPTEMBER  9 2017.....SUNRISE   626 AM CDT   SUNSET   711 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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