Climatological Report (Monthly)
Issued by NWS

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CXUS56 KSEW 011031
CLMOLM


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
231 AM PST MON JAN 1 2018

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

...THE OLYMPIA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1948 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              64   12/10/2014
                        12/01/1958
                        22/12/2298
 LOW               -7   12/23/1983
HIGHEST            54   12/29        MM      MM       50  12/20
LOWEST             20   12/11        MM      MM       15  12/17
AVG. MAXIMUM     44.0              44.2    -0.2     41.0
AVG. MINIMUM     30.0              32.6    -2.6     29.8
MEAN             37.0              38.4    -1.4     35.4
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               1.0    -1.0        0
DAYS MIN <= 32     21              13.5     7.5       19
DAYS MIN <= 0       0               0.1    -0.1        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        14.50   2015
 MINIMUM         2.02   2013
TOTALS           6.90              7.46   -0.56     6.39
DAILY AVG.       0.22              0.24   -0.02     0.21
DAYS >= .01        15              19.6    -4.6       22
DAYS >= .10         9              13.1    -4.1       16
DAYS >= .50         5               4.9     0.1        4
DAYS >= 1.00        3               1.8     1.2        1
GREATEST
 24 HR. TOTAL    1.82   12/19 TO 12/19

DEGREE_DAYS
HEATING TOTAL     860               825      35
COOLING TOTAL       0                 0       0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              4.2
HIGHEST WIND SPEED/DIRECTION    28/200    DATE  12/19
HIGHEST GUST SPEED/DIRECTION    39/270    DATE  12/29

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY         15

AVERAGE RH (PERCENT)     89

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       5
LIGHT RAIN               14     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                3     SLEET                      0
FOG                      29     FOG W/VIS <= 1/4 MILE     12
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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