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

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CXUS56 KSEW 011041
CLMSEW


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
341 AM PDT THU OCT 1 2020

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

...THE SEATTLE WA WFO CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2020...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1986 TO 2020

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               40   09/30/2019
HIGHEST            91   09/10        MM      MM       80  09/06
                                                          09/03
LOWEST             50   09/08        MM      MM       40  09/30
AVG. MAXIMUM     74.2              70.7     3.5     69.2
AVG. MINIMUM     56.6              52.5     4.1     55.4
MEAN             65.4              61.6     3.8     62.3
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           4.16              1.52    2.64     3.86
DAILY AVG.       0.14              0.05    0.09     0.13
DAYS >= .01         9               7.8     1.2       17
DAYS >= .10         6               4.0     2.0       12
DAYS >= .50         4               0.8     3.2        2
DAYS >= 1.00        1               0.0     1.0        0

DEGREE_DAYS
HEATING TOTAL      42               121     -79      102
 SINCE 7/1         97               185     -88      126
COOLING TOTAL      62                19      43       30
 SINCE 1/1        248               176      72      215
.................................................................


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       3
LIGHT RAIN                9     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      0
HAZE                     10

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

$$


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