Climatological Report (Monthly)
Issued by NWS

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CXUS56 KSEW 011031
CLMSEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
331 AM PDT TUE AUG 1 2017

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF JULY 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             103   07/29/2009
 LOW               43   07/02/1954
                        07/24/1953
                        07/04/1949
HIGHEST            87   07/25        MM      MM       89  07/29
LOWEST             53   07/19        MM      MM       55  07/05
                        07/04                             07/01
AVG. MAXIMUM     78.3              75.8     2.5     76.0
AVG. MINIMUM     56.3              55.6     0.7     57.6
MEAN             67.3              65.7     1.6     66.8
DAYS MAX >= 90      0               1.4    -1.4        0
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         2.39   1983
 MINIMUM            T   2013
                        1960
TOTALS              TR             0.70   -0.70     0.72
DAILY AVG.          T              0.02   -0.02     0.02
DAYS >= .01         0               5.0    -5.0        6
DAYS >= .10         0               2.3    -2.3        3
DAYS >= .50         0               0.2    -0.2        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL       T   07/27 TO 07/27

DEGREE_DAYS
HEATING TOTAL       6                49     -43       11
 SINCE 7/1          6                49     -43       11
COOLING TOTAL      87                71      16       75
 SINCE 1/1        149                98      51      155
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.1
HIGHEST WIND SPEED/DIRECTION    21/350    DATE  07/31
HIGHEST GUST SPEED/DIRECTION    28/350    DATE  07/17

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           15
NUMBER OF DAYS PC             15
NUMBER OF DAYS CLOUDY          1

AVERAGE RH (PERCENT)     61

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

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

$$


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