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CDUS43 KLOT 210635
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
133 AM CDT MON MAY 21 2018


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR MAY 20 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2018


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         55   1202 AM  95    1977  71    -16       64
  MINIMUM         44    626 AM  33    2002  49     -5       48
  AVERAGE         50                        60    -10       56

PRECIPITATION (IN)
  YESTERDAY        0.27          2.54 1975   0.12   0.15     0.34
  MONTH TO DATE    5.35                      2.36   2.99     2.19
  SINCE MAR 1      9.81                      8.24   1.57    12.63
  SINCE JAN 1     15.99                     11.76   4.23    17.02

SNOWFALL (IN)
  YESTERDAY       MM             0.0    MM   0.0   MM        0.0
  MONTH TO DATE    0.0                       0.0    0.0      0.0
  SINCE MAR 1      5.8                       6.8   -1.0      7.8
  SINCE JUL 1     36.1                      36.3   -0.2     26.1
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       15                         6      9        9
  MONTH TO DATE   93                       170    -77      201
  SINCE MAR 1   1665                      1503    162     1325
  SINCE JUL 1   6123                      6237   -114     5250

 COOLING
  YESTERDAY        0                         2     -2        0
  MONTH TO DATE   37                        20     17       18
  SINCE MAR 1     37                        30      7       30
  SINCE JAN 1     37                        30      7       30
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    24   HIGHEST WIND DIRECTION    NE (30)
  HIGHEST GUST SPEED    28   HIGHEST GUST DIRECTION    NE (30)
  AVERAGE WIND SPEED    13.6


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          1200 AM
 LOWEST     71           300 AM
 AVERAGE    82

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


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 2018...........SUNRISE   526 AM CDT   SUNSET   811 PM CDT
MAY 22 2018...........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 National Headquarters
