Climatological Report (Monthly)
Issued by NWS

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156
CXUS56 KSEW 011032
CLMSEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
232 AM PST SUN NOV 1 2020

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 2020...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2020

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              89   10/01/1987
 LOW               28   10/19/1949
HIGHEST            73   10/06        MM      MM       65  10/06
                        10/02
LOWEST             34   10/25        MM      MM       33  10/30
AVG. MAXIMUM     60.2              59.7     0.5     58.0
AVG. MINIMUM     48.5              45.8     2.7     43.7
MEAN             54.3              52.8     1.5     50.8
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.1    -0.1        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        10.05   2016
 MINIMUM         0.31   1987
TOTALS           2.56              3.48   -0.92     3.67
DAILY AVG.       0.08              0.11   -0.03     0.12
DAYS >= .01        11              13.1    -2.1       12
DAYS >= .10         5               7.8    -2.8        9
DAYS >= .50         3               2.0     1.0        3
DAYS >= 1.00        0               0.5    -0.5        0
GREATEST
 24 HR. TOTAL    0.61   10/11 TO 10/11

SNOWFALL (INCHES)
RECORDS
 TOTAL             MM   MM
TOTALS            0.0               0.0     0.0      0.0
SINCE 7/1         0.0               0.0     0.0      0.0
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0                                  0
GREATEST
 SNOW DEPTH         0   MM                             0
 24 HR TOTAL      0.0   10/31 TO 10/31               0.0

DEGREE_DAYS
HEATING TOTAL     324               380     -56      432
 SINCE 7/1        409               597    -188      535
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        332               189     143      323
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.8
HIGHEST WIND SPEED/DIRECTION    33/240    DATE  10/13
HIGHEST GUST SPEED/DIRECTION    48/240    DATE  10/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            2
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY         16

AVERAGE RH (PERCENT)     77

WEATHER CONDITIONS. NUMBER OF DAYS WITH
  0
  5
  0
  0
  0
  0
  5
HAZE                      6

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

$$



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