Climatological Report (Monthly)
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000
CXUS56 KSEW 011044
CLMSEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
244 AM PST WED MAR 1 2017

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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF FEBRUARY 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              70   02/27/1968
 LOW                1   02/01/1950
HIGHEST            58   02/14        MM      MM       63  02/17
                                                          02/09
LOWEST             29   02/01        MM      MM       34  02/23
                                                          02/07
AVG. MAXIMUM     46.6              49.9    -3.3     53.6
AVG. MINIMUM     36.0              36.9    -0.9     41.2
MEAN             41.3              43.4    -2.1     47.4
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.1    -0.1        0
DAYS MIN <= 32      6               5.5     0.5        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         9.11   1961
 MINIMUM         0.35   1993
TOTALS           8.85              3.50    5.35     5.97
DAILY AVG.       0.32              0.12    0.20     0.21
DAYS >= .01        22              14.7     7.3       21
DAYS >= .10        13               9.1     3.9       16
DAYS >= .50         8               2.0     6.0        3
DAYS >= 1.00        2               0.3     1.7        0
GREATEST
 24 HR. TOTAL    2.20   02/08 TO 02/09

SNOWFALL (INCHES)
RECORDS
 TOTAL           13.1   1949
TOTALS            7.2               1.7     5.5      0.0
SINCE 7/1        11.2               6.0     5.2        T
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         2                                  0
GREATEST
 SNOW DEPTH         4   02/07                          0
                        02/06
 24 HR TOTAL      5.1   MM                           0.0

DEGREE_DAYS
HEATING TOTAL     656               605      51      502
 SINCE 7/1       3173              3254     -81     2844
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.6
HIGHEST WIND SPEED/DIRECTION    33/200    DATE  02/10
HIGHEST GUST SPEED/DIRECTION    42/200    DATE  02/10

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.80
NUMBER OF DAYS FAIR            1
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY         19

AVERAGE RH (PERCENT)     79

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       5
LIGHT RAIN               21     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       6
LIGHT SNOW                7     SLEET                      0
FOG                      17     FOG W/VIS <= 1/4 MILE      2
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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