Climatological Report (Monthly)
Issued by NWS

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000
CXUS56 KSEW 011033
CLMSEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
332 AM PDT MON APR 1 2013

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF MARCH 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2013

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              78   03/29/2004
 LOW               11   03/04/1955
HIGHEST            69   03/31        MM      MM       60  03/08
LOWEST             32   03/04        MM      MM       29  03/07
AVG. MAXIMUM     54.9              53.7     1.2     49.2
AVG. MINIMUM     41.0              39.3     1.7     37.1
MEAN             47.9              46.5     1.4     43.1
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      1               1.6    -0.6        4
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.40   1950
 MINIMUM         0.57   1965
TOTALS           2.74              3.72   -0.98     7.20
DAILY AVG.       0.09              0.12   -0.03     0.23
DAYS >= .01        15              16.9    -1.9       22
DAYS >= .10         8              10.6    -2.6       17
DAYS >= .50         0               1.6    -1.6        5
DAYS >= 1.00        0               0.3    -0.3        1
GREATEST
 24 HR. TOTAL    0.47   03/06 TO 03/06

SNOWFALL (INCHES)
RECORDS
 TOTAL           18.2   1951
TOTALS            0.0               0.8    -0.8      0.9
SINCE 7/1         0.6               6.8    -6.2     10.5
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0                                  0
GREATEST
 SNOW DEPTH         0   MM                             0
 24 HR TOTAL      0.0   03/31 TO 03/31               0.9

DEGREE_DAYS
HEATING TOTAL     523               574     -51      670
 SINCE 7/1       3664              3828    -164     4057
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.7
HIGHEST WIND SPEED/DIRECTION    31/210    DATE  03/20
HIGHEST GUST SPEED/DIRECTION    44/200    DATE  03/20

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            3
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY         17

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       5
LIGHT RAIN               19     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      1
FOG                      16     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.

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