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United States of America

SEATTLE, WASHINGTON


Home > North America > United States > Washington
Elevation: 122 feet     Latitude: 47 39N     Longitude: 122 18W

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MONTHLY - ALL WEATHER AVERAGES   [ Show Summary ]
[ °C ]   °F
TEMPERATURE 
Average Temperature
Years on Record: 92  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F53414446515761656561544743

Average High Temperature
Years on Record: 92  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F59454953586469747468605147

Average Low Temperature
Years on Record: 92  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F46363840434853565653484238

Highest Recorded Temperature
Years on Record: 92  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F10067707687921001009792827365

Lowest Recorded Temperature
Years on Record: 92  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F------12230354044463619---9

Average Number of Days Above 90F/32C
Years on Record: 92  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days1------------------1---------------

Average Number of Days Above 75F/23C
Years on Record: 92  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days43---------13714135---------

Average Number of Days Below 45F/7C
Years on Record: 92  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days1722926282181------1102228

Average Number of Days Below 32F/0C
Years on Record: 92  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days20841---------------------25

Average Number of Days Below 0F/-17C
Years on Record: 42  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days ---------------------------------------



PRECIPITATION 
Average Precipitation
Years on Record: 92  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in.345.13.73.32.21.71.40.70.91.635.15.4

Average Number of Days With Precipitation
Years on Record: 42  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days 15319161614109568141719

Most Reported Precipitation in a Month
Years on Record: 42  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in 10.710.78.27.44.54.73.62.144.38.18.49.5

Least Reported Precipitation in a Month
Years on Record: 42  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in ---1.11.20.80.70.30.2---------0.50.80.9

Most Precipitation Reported in a Day
Years on Record: 42  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in 32.5321.91.81.81.21.11.52.32.61.8

Avg. No. of Days w/Precip. Above 0.2in/5mm
Years on Record: 42  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days 921291076423591213

Avg. # of Days w/Precip. Above 0.4in/10mm
Years on Record: 42  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days 18321111------1233

Avg. No. of Days w/Precip. Above 1in/25mm
Years on Record: 42  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days 411------------------------11



PRECIPITATION - RAIN 
Average Number of Rainy Days
Years on Record: 43  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days15018161714119568111818

Average Number of Days With Thunderstorms
Years on Record: 25  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days1---------------------1------------

Most Rain Reported in a Month
Years on Record: 92  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in.48.110.98.17.25.34.73.72.25.55.6811.215.3

Least Recorded Rainfall
Years on Record: 92  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in.19.50.60.30.40.20.3------------0.20.51



PRECIPITATION - SNOW 
Average Snowfall
Years on Record: 43  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in.7.130.90.6---------------------0.71.9

Most Snow Reported in a Month
Years on Record: 42  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in 26.226.27.27.40.1------------------11.410



DEGREE DAYS 
Heating Degree Days
Years on Record: 42  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days 2054472326300155473------582272392

Cooling Degree Days
Years on Record: 42  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days 147------------5195749161------

Growing Degree Days
Years on Record: 92  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days1961---------30217330465465330124------



VISIBILITY 
Average Number of Days With Fog
Years on Record: 25  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days26321111134333

Average Number of Clear Days
Years on Record: 24  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days7133457712109533

Average Possibility of Sunshine
Years on Record: 31  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
%43283442475249635653372823

Average Number of Cloudy Days
Years on Record: 24  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days20123191916141591113182123

Average Number of Partly Cloudy Days
Years on Record: 24  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days93568910810108865







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