Climatological Report (Monthly)
Issued by NWS

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CXUS56 KSEW 011031
CLMSEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
331 AM PDT SAT JUL 1 2017

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF JUNE 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              96   06/25/2017
                        06/30/1995
                        06/09/1955
 LOW               38   06/12/1952
HIGHEST            96R  06/25        MM      MM       93  06/05
LOWEST             48   06/10        MM      MM       44  06/15
AVG. MAXIMUM     72.1              69.9     2.2     73.1
AVG. MINIMUM     53.7              51.9     1.8     53.9
MEAN             62.9              60.9     2.0     63.5
DAYS MAX >= 90      1               0.5     0.5        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         3.90   1946
 MINIMUM         0.13   1951
TOTALS           1.52              1.57   -0.05     1.77
DAILY AVG.       0.05              0.05    0.00     0.06
DAYS >= .01         6               9.1    -3.1       10
DAYS >= .10         2               4.4    -2.4        6
DAYS >= .50         1               0.8     0.2        1
DAYS >= 1.00        1               0.2     0.8        0
GREATEST
 24 HR. TOTAL    1.05   06/15 TO 06/15

DEGREE_DAYS
HEATING TOTAL      99               144     -45       91
 SINCE 7/1       4506              4697    -191     3834
COOLING TOTAL      43                21      22       54
 SINCE 1/1         62                27      35       80
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.9
HIGHEST WIND SPEED/DIRECTION    23/230    DATE  06/08
HIGHEST GUST SPEED/DIRECTION    30/230    DATE  06/08

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            4
NUMBER OF DAYS PC             14
NUMBER OF DAYS CLOUDY         12

AVERAGE RH (PERCENT)     65

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       3
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       8     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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