Climatological Report (Monthly)
Issued by NWS
Issued by NWS
911 CXUS56 KSEW 011051 CLMSEA CLIMATE REPORT NATIONAL WEATHER SERVICE SEATTLE 351 AM PDT WED MAY 01 2024 ................................... ...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF APRIL 2024... 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 89 04/18/2016 LOW 29 04/05/1975 04/01/1953 04/07/1952 HIGHEST 72 04/20 MM MM 80 04/28 LOWEST 36 04/17 MM MM 35 04/02 04/03 04/04 AVG. MAXIMUM 57.7 59.3 -1.6 55.3 AVG. MINIMUM 42.7 43.3 -0.6 41.7 MEAN 50.2 51.3 -1.1 48.5 DAYS MAX >= 90 0 0.0 0.0 0 DAYS MAX <= 32 0 0.0 0.0 0 DAYS MIN <= 32 0 0.1 -0.1 0 DAYS MIN <= 0 0 0.0 0.0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 6.53 1991 MINIMUM 0.33 1956 TOTALS 0.89 3.18 -2.29 3.86 DAILY AVG. 0.03 0.11 -0.08 0.13 DAYS >= .01 12 15.0 -3.0 18 DAYS >= .10 2 8.7 -6.7 10 DAYS >= .50 0 1.5 -1.5 2 DAYS >= 1.00 0 0.3 -0.3 0 GREATEST 24 HR. TOTAL 0.50 04/25 TO 04/26 SNOWFALL (INCHES) RECORDS TOTAL 2.3 1972 TOTALS 0.0 0.0 0.0 T SINCE 7/1 0.3 6.3 -6.0 MM SNOWDEPTH AVG. 0 0 DAYS >= 1.0 0 0 GREATEST SNOW DEPTH 0 0 24 HR TOTAL MM MM DEGREE DAYS HEATING TOTAL 420 412 8 486 SINCE 7/1 3859 4016 -157 MM COOLING TOTAL 0 1 -1 0 SINCE 1/1 0 1 -1 MM ................................................................ WIND (MPH) AVERAGE WIND SPEED 9.1 HIGHEST WIND SPEED/DIRECTION 25/250 DATE 04/20 HIGHEST GUST SPEED/DIRECTION 36/270 DATE 04/20 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.68 NUMBER OF DAYS FAIR 4 NUMBER OF DAYS PC 14 NUMBER OF DAYS CLOUDY 12 AVERAGE RH (PERCENT) 65 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 0 MIXED PRECIP 0 HEAVY RAIN 0 RAIN 1 LIGHT RAIN 20 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 10 FOG W/VIS <= 1/4 MILE 0 HAZE 3 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$