Climatological Report (Daily)
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CDUS43 KLOT 170636
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
136 AM CDT SUN MAY 17 2015


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR MAY 16 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2015


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         79    433 PM  94    1962  70      9       46
  MINIMUM         62    310 AM  33    1997  48     14       37
  AVERAGE         71                        59     12       42

PRECIPITATION (IN)
  YESTERDAY        0.03          1.38 1974   0.12  -0.09     0.10
  MONTH TO DATE    3.08                      1.87   1.21     3.91
  SINCE MAR 1      7.05                      7.75  -0.70     8.46
  SINCE JAN 1      9.91                     11.27  -1.36    13.76

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 MAR 1      7.1                       6.8    0.3     13.7
  SINCE JUL 1     50.7                      36.6   14.1     82.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY        0                         7     -7       23
  MONTH TO DATE  105                       144    -39      151
  SINCE MAR 1   1475                      1477     -2     1664
  SINCE JUL 1   6655                      6211    444     7079

 COOLING
  YESTERDAY        6                         1      5        0
  MONTH TO DATE   20                        14      6       16
  SINCE MAR 1     20                        24     -4       17
  SINCE JAN 1     20                        24     -4       17
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    16   HIGHEST WIND DIRECTION     S (170)
  HIGHEST GUST SPEED    20   HIGHEST GUST DIRECTION    SE (150)
  AVERAGE WIND SPEED     7.8


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93           200 AM
 LOWEST     67           300 PM
 AVERAGE    80

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   70        94      1962
 MINIMUM TEMPERATURE (F)   49        36      2002
                                             1973


SUNRISE AND SUNSET
MAY 17 2015...........SUNRISE   529 AM CDT   SUNSET   807 PM CDT
MAY 18 2015...........SUNRISE   529 AM CDT   SUNSET   808 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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