Climatological Report (Daily)
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000
CDUS43 KLOT 210634
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
134 AM CDT SUN MAY 21 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR MAY 20 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         64    601 PM  95    1977  71     -7       68
  MINIMUM         48    310 AM  33    2002  49     -1       44
  AVERAGE         56                        60     -4       56

PRECIPITATION (IN)
  YESTERDAY        0.34          2.54 1975   0.12   0.22     0.00
  MONTH TO DATE    2.19                      2.36  -0.17     3.66
  SINCE MAR 1     12.63                      8.24   4.39     9.80
  SINCE JAN 1     17.02                     11.76   5.26    11.87

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      7.8                       6.8    1.0      3.7
  SINCE JUL 1     26.1                      36.3  -10.2     31.2
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY        9                         6      3        9
  MONTH TO DATE  201                       170     31      224
  SINCE MAR 1   1325                      1503   -178     1406
  SINCE JUL 1   5250                      6237   -987     5414

 COOLING
  YESTERDAY        0                         2     -2        0
  MONTH TO DATE   18                        20     -2        0
  SINCE MAR 1     30                        30      0        7
  SINCE JAN 1     30                        30      0        7
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    22   HIGHEST WIND DIRECTION     E (100)
  HIGHEST GUST SPEED    26   HIGHEST GUST DIRECTION     E (100)
  AVERAGE WIND SPEED    10.6


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 1.0


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93          1000 AM
 LOWEST     61           200 AM
 AVERAGE    77

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


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 2017...........SUNRISE   526 AM CDT   SUNSET   811 PM CDT
MAY 22 2017...........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.




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