Climatological Report (Daily)
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CDUS43 KLOT 310636
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
136 AM CDT MON JUL 31 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR JULY 30 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         84    344 PM 102    1916  83      1       78
  MINIMUM         62    514 AM  50    1984  64     -2       68
  AVERAGE         73                        74     -1       73

PRECIPITATION (IN)
  YESTERDAY        0.00          2.43 1979   0.14  -0.14     0.00
  MONTH TO DATE    7.68                      3.55   4.13     6.23
  SINCE JUN 1     11.12                      7.00   4.12     9.08
  SINCE JAN 1     29.23                     20.08   9.15    22.72

SNOWFALL (IN)
  YESTERDAY        0.0           0.0    MM   0.0    0.0      0.0
  MONTH TO DATE    T                         0.0    0.0      0.0
  SINCE JUN 1      T                         0.0    0.0      0.0
  SINCE JUL 1      T                         0.0    0.0      0.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE JUN 1      3                        48    -45       13
  SINCE JUL 1      0                         0      0        0

 COOLING
  YESTERDAY        8                         9     -1        8
  MONTH TO DATE  295                       269     26      324
  SINCE JUN 1    525                       434     91      540
  SINCE JAN 1    558                       488     70      614
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    13   HIGHEST WIND DIRECTION     E (70)
  HIGHEST GUST SPEED    16   HIGHEST GUST DIRECTION    NE (50)
  AVERAGE WIND SPEED     5.1


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.4


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  NO SIGNIFICANT WEATHER WAS OBSERVED.


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    78          1200 AM
 LOWEST     40           300 PM
 AVERAGE    59

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   83        99      2006
                                             1945
 MINIMUM TEMPERATURE (F)   64        51      1984


SUNRISE AND SUNSET
JULY 31 2017..........SUNRISE   544 AM CDT   SUNSET   811 PM CDT
AUGUST  1 2017........SUNRISE   545 AM CDT   SUNSET   810 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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