Climatological Report (Monthly)
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553
CXUS56 KSEW 011035
CLMSEA

CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
335 AM PDT SAT JUN 01 2024

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF MAY 2024...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1945 TO 2024

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           84   05/10         MM      MM       89  05/14
LOWEST            40   05/01         MM      MM       45  05/10
AVG. MAXIMUM    64.0               66.3    -2.3     70.6
AVG. MINIMUM    47.2               48.7    -1.5     51.2
MEAN            55.6               57.5    -1.9     60.9
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        4.76   1948
 MINIMUM        0.12   2018
TOTALS          1.54               1.88   -0.34     0.93
DAILY AVG.      0.05               0.06   -0.01     0.03
DAYS >= .01       12               11.3     0.7        8
DAYS >= .10        6                5.8     0.2        2
DAYS >= .50        1                0.9     0.1        1
DAYS >= 1.00       0                0.1    -0.1        0
GREATEST
 24 HR. TOTAL   0.66   05/21 TO 05/21

DEGREE DAYS
HEATING TOTAL    292                242      50      156
 SINCE 7/1      4151               4258    -107       MM
COOLING TOTAL      7                  9      -2       35
 SINCE 1/1         7                 10      -3       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.5
HIGHEST WIND SPEED/DIRECTION    28/220    DATE  05/16
HIGHEST GUST SPEED/DIRECTION    42/210    DATE  05/16

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.66
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             12
NUMBER OF DAYS CLOUDY         13

AVERAGE RH (PERCENT)     65

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN               15     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                      1

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

$$