CDUS46 KSEW 210827 CLISEA CLIMATE REPORT NATIONAL WEATHER SERVICE SEATTLE 127 AM PDT MON SEP 21 2026 ................................... ...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 20 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 70 419 PM 88 1974 71 -1 73 MINIMUM 50 557 AM 40 1949 53 -3 52 AVERAGE 60 62 -2 63 PRECIPITATION (IN) YESTERDAY 0.00 1.05 1972 0.05 -0.05 0.00 MONTH TO DATE 1.03 0.96 0.07 0.06 SINCE OCT 1 37.94 38.69 -0.75 28.97 SINCE JAN 1 21.16 22.75 -1.59 15.57 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 0.0 0.0 SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 5 4 1 2 MONTH TO DATE 61 51 10 16 SINCE SEP 1 61 51 10 16 SINCE JUL 1 86 106 -20 40 COOLING YESTERDAY 0 1 -1 0 MONTH TO DATE 2 29 -27 34 SINCE SEP 1 2 29 -27 34 SINCE JAN 1 267 262 5 328 ................................................................... WIND (MPH) RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION N (350) HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION NE (30) HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION N (20) AVERAGE WIND SPEED 5.6 SKY COVER AVERAGE SKY COVER 0.2 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. FOG RELATIVE HUMIDITY (PERCENT) HIGHEST 97 200 AM LOWEST 57 300 PM AVERAGE 77 .......................................................... THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 70 88 1952 1974 MINIMUM TEMPERATURE (F) 53 39 1955 1960 SUNRISE AND SUNSET SEPTEMBER 21 2026.....SUNRISE 655 AM PDT SUNSET 709 PM PDT SEPTEMBER 22 2026.....SUNRISE 656 AM PDT SUNSET 706 PM PDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$