Climatological Report (Daily)
Issued by NWS Boston, MA

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CDUS41 KBOX 210543
CLIBOS


CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
133 AM EDT MON MAY 21 2018


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

...THE BOSTON MA CLIMATE SUMMARY FOR MAY 20 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2018


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         81    108 PM  91    1996  67     14       59
  MINIMUM         54    105 AM  40    1892  51      3       52
  AVERAGE         68                        59      9       56

PRECIPITATION (IN)
  YESTERDAY        0.08          1.23 1969   0.12  -0.04     0.00
  MONTH TO DATE    1.77                      2.11  -0.34     2.04
  SINCE MAR 1     11.46                     10.17   1.29    11.95
  SINCE JAN 1     20.15                     16.78   3.37    19.42

SNOWFALL (IN)
  YESTERDAY        0.0           0.0  2002   0.0    0.0      0.0
                                      2001
                                      2000
  MONTH TO DATE    0.0                       0.1   -0.1      0.0
  SINCE MAR 1     24.6                       9.8   14.8     11.3
  SINCE JUL 1     59.9                      43.9   16.0     47.6
  SNOW DEPTH      MM

DEGREE DAYS
 HEATING
  YESTERDAY        0                         7     -7        9
  MONTH TO DATE  127                       186    -59      210
  SINCE MAR 1   1563                      1525     38     1571
  SINCE JUL 1   5315                      5567   -252     5110

 COOLING
  YESTERDAY        3                         1      2        0
  MONTH TO DATE   37                         7     30       41
  SINCE MAR 1     37                        10     27       60
  SINCE JAN 1     37                        10     27       60
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   8   RESULTANT WIND DIRECTION   W (250)
  HIGHEST WIND SPEED    22   HIGHEST WIND DIRECTION     W (250)
  HIGHEST GUST SPEED    29   HIGHEST GUST DIRECTION    SW (230)
  AVERAGE WIND SPEED    11.7


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT RAIN
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100          1200 AM
 LOWEST     58           100 PM
 AVERAGE    79

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


THE BOSTON MA CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   68        93      1921
 MINIMUM TEMPERATURE (F)   51        41      1907


SUNRISE AND SUNSET
MAY 21 2018...........SUNRISE   517 AM EDT   SUNSET   805 PM EDT
MAY 22 2018...........SUNRISE   516 AM EDT   SUNSET   806 PM EDT


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




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