Climatological Report (Daily)
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087
CDUS43 KLOT 252142
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
431 PM CDT MON SEP 25 2017


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR SEPTEMBER 25 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         92R   153 PM  90    1933  71     21       85
  MINIMUM         67    559 AM  30    1942  50     17       63
  AVERAGE         80                        61     19       74

PRECIPITATION (IN)
  TODAY            0.00          1.85 1961   0.11  -0.11     0.01
  MONTH TO DATE    0.32                      2.72  -2.40     1.15
  SINCE SEP 1      0.32                      2.72  -2.40     1.15
  SINCE JAN 1     32.06                     27.85   4.21    28.13

SNOWFALL (IN)
  TODAY            0.0           T    1942   0.0    0.0      0.0
                                      1928
  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                         6     -6        0
  MONTH TO DATE   29                        71    -42        1
  SINCE SEP 1     29                        71    -42        1
  SINCE JUL 1     34                        84    -50        1

 COOLING
  TODAY           15                         1     14        9
  MONTH TO DATE  163                        87     76      165
  SINCE SEP 1    163                        87     76      165
  SINCE JAN 1    946                       827    119     1130
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    18   HIGHEST WIND DIRECTION    SE (120)
  HIGHEST GUST SPEED    22   HIGHEST GUST DIRECTION    SE (120)
  AVERAGE WIND SPEED     5.0


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.2


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    68          1200 AM
 LOWEST     30           200 PM
 AVERAGE    49

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


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   71        90      1998
 MINIMUM TEMPERATURE (F)   50        35      1928


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