Climatological Report (Monthly)
Issued by NWS

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020
CXUS56 KSEW 062019 CCA
CLMSEA

CLIMATE REPORT...CORRECTED
NATIONAL WEATHER SERVICE SEATTLE WA
119 PM PDT THU APR 6 2017

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF MARCH 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2017

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            58   03/23        MM      MM       71  03/31
LOWEST             34   03/19        MM      MM       34  03/17
                        03/05
                        03/04
AVG. MAXIMUM     51.6              53.7    -2.1     56.4
AVG. MINIMUM     40.6              39.3     1.3     42.3
MEAN             46.1              46.5    -0.4     49.4
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           7.32              3.72    3.60     5.52
DAILY AVG.       0.24              0.12    0.12     0.18
DAYS >= .01        25              16.9     8.1       19
DAYS >= .10        17              10.6     6.4       18
DAYS >= .50         6               1.6     4.4        3
DAYS >= 1.00        0               0.3    -0.3        0
GREATEST
 24 HR. TOTAL    0.81   03/15 TO 03/15

SNOWFALL (INCHES)
RECORDS
 TOTAL           18.2   1951
TOTALS              T               0.8    -0.8      0.0
SINCE 7/1        11.2               6.8     4.4        T
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0                                  0
GREATEST
 SNOW DEPTH         0   MM                             0
 24 HR TOTAL        T   03/07 TO 03/07               0.0

DEGREE_DAYS
HEATING TOTAL     580               574       6      477
 SINCE 7/1       3753              3828     -75     3321
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.8
HIGHEST WIND SPEED/DIRECTION    31/180    DATE  03/05
HIGHEST GUST SPEED/DIRECTION    41/190    DATE  03/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.80
NUMBER OF DAYS FAIR            0
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY         25

AVERAGE RH (PERCENT)     81

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       3
LIGHT RAIN               28     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW                2     SLEET                      0
FOG                      19     FOG W/VIS <= 1/4 MILE      2
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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