Climatological Report (Monthly)
Issued by NWS Boston, MA

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CXUS51 KBOX 010815
CLMBOS


CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
400 AM EDT TUE MAY 1 2018

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

...THE BOSTON MA CLIMATE SUMMARY FOR THE MONTH OF APRIL 2018...

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

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              94   04/18/1976
 LOW               11   04/05/1874
HIGHEST            70   04/28
LOWEST             29   04/06
AVG. MAXIMUM     52.9              55.6    -2.7
AVG. MINIMUM     37.8              40.6    -2.8
MEAN             45.4              48.1    -2.7
DAYS MAX >= 90      0               0.1    -0.1
DAYS MAX <= 32      0               0.1    -0.1
DAYS MIN <= 32      7               2.1     4.9
DAYS MIN <= 0       0               0.0     0.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         9.57   2004
 MINIMUM         0.83   1999
TOTALS           4.62              3.74    0.88
DAILY AVG.       0.15              0.12    0.03
DAYS >= .01        14              11.2     2.8
DAYS >= .10        10               6.5     3.5
DAYS >= .50         3               2.2     0.8
DAYS >= 1.00        1               0.8     0.2
GREATEST
 24 HR. TOTAL    1.57   04/16 TO 04/16

SNOWFALL (INCHES)
RECORDS
 TOTAL           22.4   1997
 SNOW DEPTH        MM   MM
TOTALS            1.3               1.9    -0.6
SINCE 7/1        59.9              43.8    16.1
SNOWDEPTH AVG.     MM
DAYS >= 1.0         0               0.3    -0.3
GREATEST
 SNOW DEPTH        MM
 24 HR TOTAL      0.7   04/02 TO 04/02

DEGREE_DAYS
HEATING TOTAL     583               510      73
 SINCE 7/1       5188              5381    -193
COOLING TOTAL       0                 3      -3
 SINCE 1/1          0                 3      -3
.................................................

WIND (MPH)
AVERAGE WIND SPEED              11.9
RESULTANT WIND SPEED/DIRECTION   3/266
HIGHEST WIND SPEED/DIRECTION    35/270    DATE  04/05
HIGHEST GUST SPEED/DIRECTION    44/270    DATE  04/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            4
NUMBER OF DAYS PC             12
NUMBER OF DAYS CLOUDY         14

AVERAGE RH (PERCENT)     62

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       8
LIGHT RAIN               15     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW                3     SLEET                      1
FOG                      13     FOG W/VIS <= 1/4 MILE      3
HAZE                      2

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

$$

SIPPRELL





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