Climatological Report (Daily)
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000
CDUS43 KLOT 090632
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
131 AM CDT SAT SEP 9 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 8 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         69   1046 AM  96    1960  78     -9       82
                                      1959
                                      1933
  MINIMUM         58    409 AM  43    1986  58      0       70
  AVERAGE         64                        68     -4       76

PRECIPITATION (IN)
  YESTERDAY        T             1.65 1885   0.11  -0.11     0.05
  MONTH TO DATE    0.25                      0.92  -0.67     0.44
  SINCE SEP 1      0.25                      0.92  -0.67     0.44
  SINCE JAN 1     31.99                     26.05   5.94    27.42

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        1                         2     -1        0
  MONTH TO DATE   21                         9     12        0
  SINCE SEP 1     21                         9     12        0
  SINCE JUL 1     26                        22      4        0

 COOLING
  YESTERDAY        0                         4     -4       11
  MONTH TO DATE   13                        41    -28       68
  SINCE SEP 1     13                        41    -28       68
  SINCE JAN 1    796                       781     15     1033
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    16   HIGHEST WIND DIRECTION    NE (50)
  HIGHEST GUST SPEED    20   HIGHEST GUST DIRECTION    NE (40)
  AVERAGE WIND SPEED     7.3


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT RAIN


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    75           600 AM
 LOWEST     56           400 PM
 AVERAGE    66

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   78        95      1983
                                             1959
                                             1955
 MINIMUM TEMPERATURE (F)   57        43      1986


SUNRISE AND SUNSET
SEPTEMBER  9 2017.....SUNRISE   626 AM CDT   SUNSET   711 PM CDT
SEPTEMBER 10 2017.....SUNRISE   627 AM CDT   SUNSET   709 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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