Climatological Report (Monthly)
Issued by NWS

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CXUS56 KSEW 011031
CLMSEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
331 AM PDT SUN APR 1 2018

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF MARCH 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2018

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            73   03/12        MM      MM       58  03/23
LOWEST             33   03/04        MM      MM       34  03/19
                                                          03/05
                                                          03/04
AVG. MAXIMUM     54.0              53.7     0.3     51.5
AVG. MINIMUM     38.6              39.3    -0.7     40.5
MEAN             46.3              46.5    -0.2     46.0
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               1.6    -1.6        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         9.44   2014
 MINIMUM         0.57   1965
TOTALS           2.44              3.72   -1.28     7.31
DAILY AVG.       0.08              0.12   -0.04     0.24
DAYS >= .01        14              16.9    -2.9       25
DAYS >= .10         9              10.6    -1.6       17
DAYS >= .50         0               1.6    -1.6        6
DAYS >= 1.00        0               0.3    -0.3        0
GREATEST
 24 HR. TOTAL    0.46   03/22 TO 03/22

SNOWFALL (INCHES)
RECORDS
 TOTAL           18.2   1951
TOTALS              T               0.8    -0.8        T
SINCE 7/1         4.0               6.8    -2.8     11.2
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0                                  0
GREATEST
 SNOW DEPTH         0   MM                             0
 24 HR TOTAL        T   03/24 TO 03/24                 T

DEGREE_DAYS
HEATING TOTAL     572               574      -2      581
 SINCE 7/1       3605              3828    -223     3754
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.3
HIGHEST WIND SPEED/DIRECTION    31/200    DATE  03/08
HIGHEST GUST SPEED/DIRECTION    39/210    DATE  03/08

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            4
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY         14

AVERAGE RH (PERCENT)     70

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN               15     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW                1     SLEET                      0
FOG                      14     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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