Climatological Report (Daily)
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CDUS43 KLOT 200635
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
135 AM CDT WED SEP 20 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 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         79   1236 PM  93    1955  74      5       88
  MINIMUM         64   1159 PM  40    1991  53     11       56
  AVERAGE         72                        63      9       72

PRECIPITATION (IN)
  YESTERDAY        0.07          1.72 2001   0.11  -0.04     0.00
  MONTH TO DATE    0.32                      2.07  -1.75     0.59
  SINCE SEP 1      0.32                      2.07  -1.75     0.59
  SINCE JAN 1     32.06                     27.20   4.86    27.57

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        0                         4     -4        0
  MONTH TO DATE   29                        40    -11        1
  SINCE SEP 1     29                        40    -11        1
  SINCE JUL 1     34                        53    -19        1

 COOLING
  YESTERDAY        7                         2      5        7
  MONTH TO DATE   64                        76    -12      123
  SINCE SEP 1     64                        76    -12      123
  SINCE JAN 1    847                       816     31     1088
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    15   HIGHEST WIND DIRECTION    NE (50)
  HIGHEST GUST SPEED    17   HIGHEST GUST DIRECTION    NE (50)
  AVERAGE WIND SPEED     6.4


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.6


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT RAIN
  FOG
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93           300 AM
 LOWEST     56           400 PM
 AVERAGE    75

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   73        91      1931
                                             1895
 MINIMUM TEMPERATURE (F)   52        36      1991


SUNRISE AND SUNSET
SEPTEMBER 20 2017.....SUNRISE   637 AM CDT   SUNSET   652 PM CDT
SEPTEMBER 21 2017.....SUNRISE   638 AM CDT   SUNSET   650 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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