CDUS46 KSEW 220827 CLISEA CLIMATE REPORT NATIONAL WEATHER SERVICE SEATTLE 127 AM PDT SAT AUG 22 2026 ................................... ...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 21 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 81 1157 AM 91 2018 77 4 78 MINIMUM 60 1159 PM 44 1947 57 3 53 AVERAGE 71 67 4 66 PRECIPITATION (IN) YESTERDAY 0.00 0.70 1989 0.03 -0.03 0.00 MONTH TO DATE T 0.58 -0.58 1.14 SINCE OCT 1 36.35 37.34 -0.99 28.91 SINCE JAN 1 19.57 21.40 -1.83 15.51 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 0 1 -1 0 MONTH TO DATE 1 14 -13 2 SINCE JUN 1 116 163 -47 117 SINCE JUL 1 21 45 -24 23 COOLING YESTERDAY 6 3 3 1 MONTH TO DATE 76 76 0 67 SINCE JUN 1 234 201 33 228 SINCE JAN 1 244 211 33 231 ................................................................... WIND (MPH) RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION W (250) HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION SW (220) HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION S (180) AVERAGE WIND SPEED 5.0 SKY COVER AVERAGE SKY COVER 0.5 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 87 1100 PM LOWEST 47 1200 PM AVERAGE 67 .......................................................... THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 77 89 2018 MINIMUM TEMPERATURE (F) 57 45 1960 SUNRISE AND SUNSET AUGUST 22 2026........SUNRISE 615 AM PDT SUNSET 808 PM PDT AUGUST 23 2026........SUNRISE 616 AM PDT SUNSET 806 PM PDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$