Climatological Report (Daily)
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CDUS43 KLOT 072135
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
435 PM CDT THU SEP 7 2017


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR SEPTEMBER 7 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         71    251 PM 100    1960  78     -7       89
                                      1939
  MINIMUM         52    614 AM  42    1986  58     -6       74
  AVERAGE         62                        68     -6       82

PRECIPITATION (IN)
  TODAY            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)
  TODAY            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

DEGREE DAYS
 HEATING
  TODAY            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
  TODAY            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    25   HIGHEST GUST DIRECTION     W (270)
  AVERAGE WIND SPEED     9.9


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    83           600 AM
 LOWEST     35           300 PM
 AVERAGE    59

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


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


SUNRISE AND SUNSET
SEPTEMBER  7 2017.....SUNRISE   624 AM CDT   SUNSET   714 PM CDT
SEPTEMBER  8 2017.....SUNRISE   625 AM CDT   SUNSET   713 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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