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CDUS43 KLOT 210832
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
323 AM CDT TUE MAY 21 2013


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR MAY 20 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2013


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         89    235 PM  95    1977  71     18       93
  MINIMUM         65   1007 PM  33    2002  49     16       65
  AVERAGE         77                        60     17       79

PRECIPITATION (IN)
  YESTERDAY        1.09          2.54 1975   0.12   0.97     0.14
  MONTH TO DATE    1.72                      2.36  -0.64     3.26
  SINCE MAR 1     12.40                      8.24   4.16     7.59
  SINCE JAN 1     18.99                     11.76   7.23    11.09

SNOWFALL (IN)
  YESTERDAY        0.0           0.0    MM   0.0    0.0      0.0
  MONTH TO DATE    0.0                       0.0    0.0       T
  SINCE MAR 1     10.5                       6.8    3.7      0.3
  SINCE JUL 1     30.1                      36.3   -6.2     19.8
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY        0                         6     -6        0
  MONTH TO DATE  128                       170    -42       78
  SINCE MAR 1   1664                      1503    161      895
  SINCE JUL 1   6066                      6237   -171     4868

 COOLING
  YESTERDAY       12                         2     10       14
  MONTH TO DATE   43                        20     23       51
  SINCE MAR 1     51                        30     21       94
  SINCE JAN 1     51                        30     21       94
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    31   HIGHEST WIND DIRECTION    SW (240)
  HIGHEST GUST SPEED    45   HIGHEST GUST DIRECTION    SW (220)
  AVERAGE WIND SPEED    13.7


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.7


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93          1100 PM
 LOWEST     29           200 PM
 AVERAGE    61

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   72        92      1977
                                             1934
 MINIMUM TEMPERATURE (F)   50        31      2002


SUNRISE AND SUNSET
MAY 21 2013...........SUNRISE   526 AM CDT   SUNSET   811 PM CDT
MAY 22 2013...........SUNRISE   525 AM CDT   SUNSET   812 PM CDT


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




$$
National Weather Service Regional Office
