Climatological Report (Daily)
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CDUS43 KLOT 310637
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1236 AM CST WED JAN 31 2018


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR JANUARY 30 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         31   1159 PM  55    1988  32     -1       37
  MINIMUM         15    720 AM -15    1966  17     -2       15
                                      1951
  AVERAGE         23                        24     -1       26

PRECIPITATION (IN)
  YESTERDAY        0.00          0.97 1939   0.05  -0.05     0.01
  MONTH TO DATE    1.54                      1.68  -0.14     2.84
  SINCE DEC 1      2.13                      3.93  -1.80     4.61
  SINCE JAN 1      1.54                      1.68  -0.14     2.84

SNOWFALL (IN)
  YESTERDAY        0.0          14.9  1939   0.4   -0.4      0.1
  MONTH TO DATE    4.6                      10.4   -5.8      0.6
  SINCE DEC 1      9.9                      18.6   -8.7     18.3
  SINCE JUL 1     10.0                      20.0  -10.0     18.3
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       42                        41      1       39
  MONTH TO DATE 1217                      1238    -21     1089
  SINCE DEC 1   2382                      2393    -11     2320
  SINCE JUL 1   3425                      3649   -224     3149

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1      0                         0      0        0
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    26   HIGHEST WIND DIRECTION     S (170)
  HIGHEST GUST SPEED    34   HIGHEST GUST DIRECTION     S (170)
  AVERAGE WIND SPEED    10.5


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.5


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    80           300 AM
 LOWEST     46           100 PM
 AVERAGE    63

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   32        65      1989
 MINIMUM TEMPERATURE (F)   17       -12      1985
                                             1899


SUNRISE AND SUNSET
JANUARY 31 2018.......SUNRISE   705 AM CST   SUNSET   505 PM CST
FEBRUARY  1 2018......SUNRISE   704 AM CST   SUNSET   507 PM CST


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




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