Climatological Report (Monthly)
Issued by NWS

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CXUS56 KSEW 011032
CLMSEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
331 AM PDT MON JUN 1 2015

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF MAY 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              93   05/21/1963
 LOW               28   05/01/1954
HIGHEST            82   05/28        MM      MM       85  05/01
LOWEST             43   05/07        MM      MM       45  05/10
                                                          05/09
                                                          05/07
AVG. MAXIMUM     68.0              64.7     3.3     67.8
AVG. MINIMUM     50.2              47.3     2.9     50.4
MEAN             59.1              56.0     3.1     59.1
DAYS MAX >= 90      0               0.1    -0.1        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         4.76   1948
 MINIMUM         0.12   1992
TOTALS           0.58              1.94   -1.36     3.15
DAILY AVG.       0.02              0.06   -0.04     0.10
DAYS >= .01         4              12.0    -8.0        8
DAYS >= .10         3               6.0    -3.0        6
DAYS >= .50         0               0.8    -0.8        3
DAYS >= 1.00        0               0.0     0.0        1
GREATEST
 24 HR. TOTAL    0.31   05/12 TO 05/13

DEGREE_DAYS
HEATING TOTAL     181               285    -104      188
 SINCE 7/1       3526              4553   -1027     4152
COOLING TOTAL       7                 6       1       14
 SINCE 1/1          7                 6       1       15
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.3
HIGHEST WIND SPEED/DIRECTION    23/220    DATE  05/04
HIGHEST GUST SPEED/DIRECTION    32/220    DATE  05/22

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY         12

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       2
LIGHT RAIN                7     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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