Climatological Report (Daily)
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066
CDUS43 KLOT 250641
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
135 AM CDT MON SEP 25 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 24 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         93R   157 PM  91    1891  72     21       74
  MINIMUM         70    531 AM  35    1989  51     19       66
                                      1985
                                      1942
  AVERAGE         82                        61     21       70

PRECIPITATION (IN)
  YESTERDAY        0.00          1.85 1977   0.11  -0.11     0.00
  MONTH TO DATE    0.32                      2.61  -2.29     1.14
  SINCE SEP 1      0.32                      2.61  -2.29     1.14
  SINCE JAN 1     32.06                     27.74   4.32    28.12

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                         6     -6        0
  MONTH TO DATE   29                        65    -36        1
  SINCE SEP 1     29                        65    -36        1
  SINCE JUL 1     34                        78    -44        1

 COOLING
  YESTERDAY       17                         2     15        5
  MONTH TO DATE  148                        86     62      156
  SINCE SEP 1    148                        86     62      156
  SINCE JAN 1    931                       826    105     1121
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    15   HIGHEST WIND DIRECTION     E (110)
  HIGHEST GUST SPEED    20   HIGHEST GUST DIRECTION     S (200)
  AVERAGE WIND SPEED     6.2


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.1


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    79           200 AM
 LOWEST     30           400 PM
 AVERAGE    55

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   71        90      1933
 MINIMUM TEMPERATURE (F)   50        30      1942


SUNRISE AND SUNSET
SEPTEMBER 25 2017.....SUNRISE   642 AM CDT   SUNSET   643 PM CDT
SEPTEMBER 26 2017.....SUNRISE   644 AM CDT   SUNSET   641 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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