769 CDUS46 KSEW 180926 CLISEA CLIMATE REPORT NATIONAL WEATHER SERVICE SEATTLE 126 AM PST THU DEC 18 2025 ................................... ...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 17 2025... CLIMATE NORMAL PERIOD 1991 TO 2020 CLIMATE RECORD PERIOD 1945 TO 2025 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 52 1220 AM 57 1994 47 5 56 MINIMUM 42 835 AM 11 1964 37 5 42 AVERAGE 47 42 5 49 PRECIPITATION (IN) YESTERDAY 0.38 1.61 1979 0.17 0.21 0.88 MONTH TO DATE 6.91 3.14 3.77 2.37 SINCE OCT 1 16.32 13.36 2.96 10.27 SINCE JAN 1 32.59 36.76 -4.17 29.05 SNOWFALL (IN) YESTERDAY 0.0 0.1 1992 0.0 MONTH TO DATE 0.0 0.0 SINCE OCT 1 0.0 0.0 SINCE JUL 1 0.0 0.0 SNOW DEPTH 0 DEGREE DAYS HEATING YESTERDAY 18 23 -5 16 MONTH TO DATE 273 384 -111 392 SINCE DEC 1 273 384 -111 392 SINCE JUL 1 1187 1445 -258 1433 COOLING YESTERDAY 0 0 0 0 MONTH TO DATE 0 0 0 0 SINCE DEC 1 0 0 0 0 SINCE JAN 1 328 263 65 315 ................................................................... WIND (MPH) RESULTANT WIND SPEED 15 RESULTANT WIND DIRECTION S (200) HIGHEST WIND SPEED 37 HIGHEST WIND DIRECTION SW (210) HIGHEST GUST SPEED 51 HIGHEST GUST DIRECTION SW (220) AVERAGE WIND SPEED 16.8 SKY COVER AVERAGE SKY COVER 0.7 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. RAIN LIGHT RAIN FOG RELATIVE HUMIDITY (PERCENT) HIGHEST 93 1200 AM LOWEST 68 200 PM AVERAGE 81 .......................................................... THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 47 55 2024 MINIMUM TEMPERATURE (F) 37 18 1964 SUNRISE AND SUNSET DECEMBER 18 2025......SUNRISE 752 AM PST SUNSET 420 PM PST DECEMBER 19 2025......SUNRISE 753 AM PST SUNSET 420 PM PST - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$