Climatological Report (Monthly)
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000
CXUS56 KSEW 011037
CLMSEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
337 AM PDT WED OCT 1 2014

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2014

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              98   09/02/1988
 LOW               35   09/27/1972
HIGHEST            90   09/06        MM      MM       93  09/11
LOWEST             50   09/13        MM      MM       45  09/26
AVG. MAXIMUM     73.7              70.5     3.2     70.4
AVG. MINIMUM     55.8              52.1     3.7     56.5
MEAN             64.8              61.3     3.5     63.5
DAYS MAX >= 90      1               0.2     0.8        1
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         6.17   2013
 MINIMUM            T   1991
TOTALS           2.23              1.50    0.73     6.17
DAILY AVG.       0.07              0.05    0.02     0.21
DAYS >= .01         9               7.9     1.1       14
DAYS >= .10         5               4.1     0.9        9
DAYS >= .50         2               0.7     1.3        6
DAYS >= 1.00        0               0.1    -0.1        2
GREATEST
 24 HR. TOTAL    1.52   09/23 TO 09/24

DEGREE_DAYS
HEATING TOTAL      42               132     -90       96
 SINCE 7/1         65               217    -152      111
COOLING TOTAL      44                21      23       55
 SINCE 1/1        367               189     178      385
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.0
HIGHEST WIND SPEED/DIRECTION    23/210    DATE  09/02
HIGHEST GUST SPEED/DIRECTION    29/210    DATE  09/18

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           11
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY         10

AVERAGE RH (PERCENT)     66

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