CDUS46 KSEW 180826 CLISEA CLIMATE REPORT NATIONAL WEATHER SERVICE SEATTLE 126 AM PDT MON MAY 18 2026 ................................... ...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR MAY 17 2026... CLIMATE NORMAL PERIOD 1991 TO 2020 CLIMATE RECORD PERIOD 1945 TO 2026 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 62 517 PM 90 2008 67 -5 62 MINIMUM 41 410 AM 39 1966 49 -8 48 2011 AVERAGE 52 58 -6 55 PRECIPITATION (IN) YESTERDAY 0.00 0.72 1989 0.06 -0.06 0.18 MONTH TO DATE 0.49 1.09 -0.60 0.36 SINCE OCT 1 33.94 33.92 0.02 26.87 SINCE JAN 1 17.16 17.98 -0.82 13.47 SNOWFALL (IN) YESTERDAY 0.0 MM MM 0.0 MONTH TO DATE 0.0 0.0 SINCE OCT 1 3.0 2.3 SINCE JUL 1 3.0 2.3 SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 13 7 6 10 MONTH TO DATE 121 153 -32 160 SINCE MAR 1 1077 1122 -45 1087 SINCE JUL 1 3827 4169 -342 4244 COOLING YESTERDAY 0 0 0 0 MONTH TO DATE 6 0 6 0 SINCE MAR 1 6 1 5 0 SINCE JAN 1 6 1 5 0 ................................................................... WIND (MPH) RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION S (180) HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION W (270) HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION W (280) AVERAGE WIND SPEED 4.5 SKY COVER AVERAGE SKY COVER 0.7 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 93 700 AM LOWEST 44 600 PM AVERAGE 69 .......................................................... THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 67 89 1958 MINIMUM TEMPERATURE (F) 49 37 1950 2003 SUNRISE AND SUNSET MAY 18 2026...........SUNRISE 529 AM PDT SUNSET 843 PM PDT MAY 19 2026...........SUNRISE 527 AM PDT SUNSET 845 PM PDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$