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

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CXUS56 KSEW 011031
CLMSEW

CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
331 AM PDT TUE JUN 01 2021

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

...THE SEATTLE WA WFO CLIMATE SUMMARY FOR THE MONTH OF MAY 2021...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1986 TO 2021

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             90   05/17/2008
 LOW              35   05/07/2002
                       05/06/2002
HIGHEST           78   05/31         MM      MM       85  05/10
                                                          05/09
LOWEST            43   05/10         MM      MM       41  05/04
AVG. MAXIMUM    65.3               65.3     0.0     67.5
AVG. MINIMUM    48.2               48.3    -0.1     49.8
MEAN            56.8               56.8    -0.0     58.7
DAYS MAX >= 90     0                0.0     0.0        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        4.21   2020
 MINIMUM        0.30   2018
TOTALS          1.37               2.16   -0.79     4.21
DAILY AVG.      0.04               0.07   -0.03     0.14
DAYS >= .01        9               12.2    -3.2       17
DAYS >= .10        4                6.4    -2.4       10
DAYS >= .50        1                0.9     0.1        2
DAYS >= 1.00       0                0.1    -0.1        2

DEGREE DAYS
HEATING TOTAL    247                258     -11      198
 SINCE 7/1      4144               4356    -212     4205
COOLING TOTAL      0                  4      -4       12
 SINCE 1/1         0                  4      -4       12
................................................................


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       3
LIGHT RAIN               12     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                      0

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

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