Climatological Report (Daily)
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CDUS43 KLOT 160639
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
138 AM CDT TUE MAY 16 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR MAY 15 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         82    248 PM  91    1962  70     12       55
  MINIMUM         50    519 AM  35    2016  48      2       35
                                      1895
  AVERAGE         66                        59      7       45

PRECIPITATION (IN)
  YESTERDAY        0.02          2.31 1915   0.12  -0.10     0.00
  MONTH TO DATE    1.25                      1.75  -0.50     3.66
  SINCE MAR 1     11.69                      7.63   4.06     9.80
  SINCE JAN 1     16.08                     11.15   4.93    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        0                         7     -7       20
  MONTH TO DATE  172                       137     35      171
  SINCE MAR 1   1296                      1470   -174     1353
  SINCE JUL 1   5221                      6204   -983     5361

 COOLING
  YESTERDAY        1                         1      0        0
  MONTH TO DATE    1                        13    -12        0
  SINCE MAR 1     13                        23    -10        7
  SINCE JAN 1     13                        23    -10        7
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    22   HIGHEST WIND DIRECTION    NW (310)
  HIGHEST GUST SPEED    27   HIGHEST GUST DIRECTION    NW (320)
  AVERAGE WIND SPEED     9.0


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.6


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  THUNDERSTORM


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    71           500 AM
 LOWEST     39           100 PM
 AVERAGE    55

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   70        94      1962
 MINIMUM TEMPERATURE (F)   48        33      1997


SUNRISE AND SUNSET
MAY 16 2017...........SUNRISE   530 AM CDT   SUNSET   807 PM CDT
MAY 17 2017...........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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