Climatological Report (Daily)
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000
CDUS43 KLOT 202138
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
438 PM CDT SAT MAY 20 2017


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR MAY 20 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         59    259 PM  95    1977  71    -12       68
  MINIMUM         48    310 AM  33    2002  49     -1       44
  AVERAGE         54                        60     -6       56

PRECIPITATION (IN)
  TODAY            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)
  TODAY            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

DEGREE DAYS
 HEATING
  TODAY           11                         6      5        9
  MONTH TO DATE  203                       170     33      224
  SINCE MAR 1   1327                      1503   -176     1406
  SINCE JUL 1   5252                      6237   -985     5414

 COOLING
  TODAY            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    12.5


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 1.0


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


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

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


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


SUNRISE AND SUNSET
MAY 20 2017...........SUNRISE   526 AM CDT   SUNSET   810 PM CDT
MAY 21 2017...........SUNRISE   526 AM CDT   SUNSET   811 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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