Climatological Report (Monthly)
Issued by NWS

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CXUS56 KSEW 011031
CLMSEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
330 AM PDT FRI MAY 1 2015

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF APRIL 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              87   04/26/1947
 LOW               29   04/05/1975
                        04/01/1953
                        04/07/1952
HIGHEST            77   04/27        MM      MM       82  04/30
LOWEST             37   04/14        MM      MM       40  04/28
                        04/05
AVG. MAXIMUM     59.9              58.5     1.4     59.8
AVG. MINIMUM     42.8              42.2     0.6     44.1
MEAN             51.4              50.3     1.1     52.0
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.53   1991
 MINIMUM         0.33   1956
TOTALS           2.03              2.71   -0.68     4.18
DAILY AVG.       0.07              0.09   -0.02     0.14
DAYS >= .01        13              14.3    -1.3       13
DAYS >= .10         7               7.5    -0.5       12
DAYS >= .50         1               1.3    -0.3        3
DAYS >= 1.00        0               0.2    -0.2        0
GREATEST
 24 HR. TOTAL    0.60   04/13 TO 04/14

SNOWFALL (INCHES)
RECORDS
 TOTAL            2.3   1972
TOTALS            0.0               0.0     0.0      0.0
SINCE 7/1         0.8               6.8    -6.0      4.0
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0                                  0
GREATEST
 SNOW DEPTH         0   MM                             0
 24 HR TOTAL      0.0   04/30 TO 04/30               0.0

DEGREE_DAYS
HEATING TOTAL     401               440     -39      385
 SINCE 7/1       3345              4268    -923     3964
COOLING TOTAL       0                 0       0        1
 SINCE 1/1          0                 0       0        1
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.4
HIGHEST WIND SPEED/DIRECTION    25/200    DATE  04/11
HIGHEST GUST SPEED/DIRECTION    40/330    DATE  04/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC             17
NUMBER OF DAYS CLOUDY          8

AVERAGE RH (PERCENT)     65

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       7
LIGHT RAIN               15     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      11     FOG W/VIS <= 1/4 MILE      0
HAZE                      0

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

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