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000
CXUS56 KSEW 011034
CLMSEA

CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
334 AM PDT THU JUN 01 2023

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF MAY 2023...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1945 TO 2023

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           89   05/14         MM      MM       71  05/22
LOWEST            45   05/10         MM      MM       40  05/08
                                                          05/09
                                                          05/13
AVG. MAXIMUM    70.6               66.3     4.3     60.0
AVG. MINIMUM    51.2               48.7     2.5     45.2
MEAN            60.9               57.5     3.4     52.6
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          0.93               1.88   -0.95     3.82
DAILY AVG.      0.03               0.06   -0.03     0.12
DAYS >= .01        8               11.3    -3.3       15
DAYS >= .10        2                5.8    -3.8       10
DAYS >= .50        1                0.9     0.1        2
DAYS >= 1.00       0                0.1    -0.1        0
GREATEST
 24 HR. TOTAL   0.74   05/04 TO 05/05

DEGREE DAYS
HEATING TOTAL    156                242     -86      375
 SINCE 7/1      4321               4258      63       MM
COOLING TOTAL     35                  9      26        0
 SINCE 1/1        35                 10      25       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.1
HIGHEST WIND SPEED/DIRECTION    33/010    DATE  05/02
HIGHEST GUST SPEED/DIRECTION    43/010    DATE  05/02

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.59
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY         11

AVERAGE RH (PERCENT)     63

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       5     FOG W/VIS <= 1/4 MILE      1
HAZE                      6

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

$$