Climatological Report (Daily)
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CDUS43 KLOT 042138
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
438 PM CDT MON SEP 4 2017


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR SEPTEMBER 4 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         82   1139 AM  95    1983  79      3       80
                                      1960
                                      1954
  MINIMUM         68    540 AM  45    1997  59      9       59
                                      1982
  AVERAGE         75                        69      6       70

PRECIPITATION (IN)
  TODAY            T             2.95 1894   0.12  -0.12     0.00
  MONTH TO DATE    0.25                      0.47  -0.22      T
  SINCE SEP 1      0.25                      0.47  -0.22      T
  SINCE JAN 1     31.99                     25.60   6.39    26.98

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            0                         1     -1        0
  MONTH TO DATE    7                         4      3        0
  SINCE SEP 1      7                         4      3        0
  SINCE JUL 1     12                        17     -5        0

 COOLING
  TODAY           10                         5      5        5
  MONTH TO DATE   16                        22     -6       12
  SINCE SEP 1     16                        22     -6       12
  SINCE JAN 1    799                       762     37      977
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    24   HIGHEST WIND DIRECTION     W (250)
  HIGHEST GUST SPEED    31   HIGHEST GUST DIRECTION    SW (230)
  AVERAGE WIND SPEED    13.9


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.6


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    79           200 PM
 LOWEST     53           300 AM
 AVERAGE    66

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


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   79        98      1899
 MINIMUM TEMPERATURE (F)   59        44      1988
                                             1984


SUNRISE AND SUNSET
SEPTEMBER  4 2017.....SUNRISE   621 AM CDT   SUNSET   720 PM CDT
SEPTEMBER  5 2017.....SUNRISE   622 AM CDT   SUNSET   718 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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