Climatological Report (Monthly)
Issued by NWS
Issued by NWS
960 CXUS56 KSEW 052102 CLMSEA CLIMATE REPORT NATIONAL WEATHER SERVICE SEATTLE 102 PM PST FRI JAN 05 2024 ................................... ...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2023... CLIMATE NORMAL PERIOD 1991 TO 2020 CLIMATE RECORD PERIOD 1945 TO 2024 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 66 12/10/2014 LOW 6 12/30/1968 HIGHEST 63 12/29 MM MM 57 12/26 LOWEST 30 12/24 MM MM 18 12/22 AVG. MAXIMUM 50.6 47.0 3.6 43.2 AVG. MINIMUM 40.4 37.1 3.3 34.4 MEAN 45.5 42.0 3.5 38.8 DAYS MAX >= 90 0 0.0 0.0 0 DAYS MAX <= 32 0 0.5 -0.5 2 DAYS MIN <= 32 1 7.2 -6.2 13 DAYS MIN <= 0 0 0.0 0.0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 11.85 1979 MINIMUM 1.37 1978 TOTALS 8.48 5.72 2.76 7.55 DAILY AVG. 0.27 0.18 0.09 0.25 DAYS >= .01 18 18.4 -0.4 24 DAYS >= .10 15 12.1 2.9 16 DAYS >= .50 6 3.6 2.4 4 DAYS >= 1.00 2 1.0 1.0 2 GREATEST 24 HR. TOTAL 3.00 12/04 TO 12/05 SNOWFALL (INCHES) RECORDS TOTAL 22.1 1968 TOTALS 0.0 1.7 -1.7 4.7 SINCE 7/1 0.0 1.9 -1.9 MM SNOWDEPTH AVG. 0 0 DAYS >= 1.0 0 1 GREATEST SNOW DEPTH 0 2 24 HR TOTAL 0.0 MM DEGREE DAYS HEATING TOTAL 596 711 -115 805 SINCE 7/1 1599 1770 -171 MM COOLING TOTAL 0 0 0 0 SINCE 1/1 378 263 115 MM ................................................................ WIND (MPH) AVERAGE WIND SPEED 7.2 HIGHEST WIND SPEED/DIRECTION 35/190 DATE 12/02 HIGHEST GUST SPEED/DIRECTION 52/190 DATE 12/02 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.82 NUMBER OF DAYS FAIR 1 NUMBER OF DAYS PC 7 NUMBER OF DAYS CLOUDY 23 AVERAGE RH (PERCENT) 80 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 1 MIXED PRECIP 0 HEAVY RAIN 2 RAIN 9 LIGHT RAIN 21 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 24 FOG W/VIS <= 1/4 MILE 6 HAZE 4 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$