Climatological Report (Daily)
Issued by NWS St Louis, MO

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CDUS43 KLSX 312247
CLISTL


CLIMATE REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
442 PM CST SUN DEC 31 2017


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

...THE ST. LOUIS CLIMATE SUMMARY FOR DECEMBER 31 2017...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1874 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         12    300 PM  74    1951  40    -28       55
                                      1875
  MINIMUM          4    913 AM -10    1976  24    -20       30
  AVERAGE          8                        32    -24       43

PRECIPITATION (IN)
  TODAY            T             1.69 1984   0.09  -0.09     0.00
  MONTH TO DATE    0.84                      2.84  -2.00     1.13
  SINCE DEC 1      0.84                      2.84  -2.00     1.13
  SINCE JAN 1     36.65                     40.96  -4.31    41.44

SNOWFALL (IN)
  TODAY           MM             2.5  1927   0.2   MM        0.0
  MONTH TO DATE    3.5                       4.4   -0.9      0.2
  SINCE DEC 1      3.5                       4.4   -0.9      0.2
  SINCE JUL 1      3.5                       5.1   -1.6      0.2
  SNOW DEPTH       T

DEGREE DAYS
 HEATING
  TODAY           57                        33     24       22
  MONTH TO DATE  927                       939    -12      931
  SINCE DEC 1    927                       939    -12      931
  SINCE JUL 1   1629                      1765   -136     1422

 COOLING
  TODAY            0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1   1959                      1646    313     2162
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    17   HIGHEST WIND DIRECTION    NW (310)
  HIGHEST GUST SPEED    21   HIGHEST GUST DIRECTION    NW (320)
  AVERAGE WIND SPEED    10.2


SKY COVER
  AVERAGE SKY COVER 0.7



RELATIVE HUMIDITY (PERCENT)
 HIGHEST    76           400 AM
 LOWEST     63           100 PM
 AVERAGE    70

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


THE ST. LOUIS CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   40        70      1965
 MINIMUM TEMPERATURE (F)   24       -10      1974
                                             1887


SUNRISE AND SUNSET
DECEMBER 31 2017......SUNRISE   720 AM CST   SUNSET   450 PM CST
JANUARY  1 2018.......SUNRISE   720 AM CST   SUNSET   451 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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