Climatological Report (Monthly)
Issued by NWS

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CXUS56 KSEW 011047
CLMSEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
347 AM PDT TUE SEP 1 2015

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF AUGUST 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              99   08/09/1981
                        08/09/1960
 LOW               44   08/14/1955
                        08/13/1955
                        08/27/1952
HIGHEST            92   08/01        MM      MM       96  08/11
LOWEST             54   08/25        MM      MM       52  08/21
                        08/24
                        08/22
AVG. MAXIMUM     79.0              76.3     2.7     79.5
AVG. MINIMUM     58.5              55.9     2.6     58.8
MEAN             68.7              66.1     2.6     69.1
DAYS MAX >= 90      1               0.8     0.2        2
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         4.59   1975
 MINIMUM            T   2012
TOTALS           3.28              0.88    2.40     1.81
DAILY AVG.       0.11              0.03    0.08     0.06
DAYS >= .01         6               4.8     1.2        7
DAYS >= .10         4               2.3     1.7        3
DAYS >= .50         2               0.5     1.5        2
DAYS >= 1.00        2               0.1     1.9        0
GREATEST
 24 HR. TOTAL    1.35   08/29 TO 08/30

DEGREE_DAYS
HEATING TOTAL      10                36     -26        9
 SINCE 7/1         12                85     -73       23
COOLING TOTAL     132                70      62      145
 SINCE 1/1        460               168     292      323
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.1
HIGHEST WIND SPEED/DIRECTION    35/210    DATE  08/29
HIGHEST GUST SPEED/DIRECTION    46/210    DATE  08/29

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            9
NUMBER OF DAYS PC             16
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     60

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       4
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       1
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       7     FOG W/VIS <= 1/4 MILE      0
HAZE                      3

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

$$


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