Climatological Report (Monthly)
Issued by NWS Seattle/Tacoma, WA

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000
CXUS56 KSEW 011044
CLMSEW


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
344 AM PDT SUN OCT 1 2017

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

...THE SEATTLE WA WFO CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1986 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              93   09/03/1988
 LOW               42   09/24/2005
                        09/24/2000
HIGHEST            90   09/02        MM      MM       79  09/26
LOWEST             48   09/20        MM      MM       44  09/30
                        09/15                             09/29
AVG. MAXIMUM     74.7              70.7     4.0     70.4
AVG. MINIMUM     55.0              52.5     2.5     52.4
MEAN             64.9              61.6     3.3     61.4
DAYS MAX >= 90      1               0.1     0.9        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         5.01   2013
 MINIMUM         0.02   1991
                        1990
TOTALS           1.10              1.52   -0.42     1.53
DAILY AVG.       0.04              0.05   -0.01     0.05
DAYS >= .01         7               7.8    -0.8        9
DAYS >= .10         4               4.0     0.0        4
DAYS >= .50         0               0.8    -0.8        1
DAYS >= 1.00        0               0.0     0.0        0

DEGREE_DAYS
HEATING TOTAL      71               121     -50      107
 SINCE 7/1         74               185    -111      120
COOLING TOTAL      73                19      54        5
 SINCE 1/1        345               176     169      260
.................................................................

WIND (MPH)
HIGHEST GUST SPEED/DIRECTION    MM        DATE   MM


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN                8     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                      4

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

$$



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