Climatological Report (Monthly)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
000 CXUS51 KLWX 121745 CCA CLMIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 145 PM EDT WED MAY 12 2023 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF APRIL 2023... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1960 TO 2023 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE NORMAL .............................................................. TEMPERATURE (F) RECORD HIGH 93 04/06/2010 04/17/2002 LOW 17 04/01/1969 HIGHEST 88 04/05 85 3 86 04/20 04/21 LOWEST 30 04/09 25 5 30 AVG. MAXIMUM 72.7 66.8 5.9 65.3 AVG. MINIMUM 45.6 43.2 2.4 42.1 MEAN 59.1 55.0 4.1 53.7 DAYS MAX >= 90 0 0.4 -0.4 0 DAYS MAX <= 32 0 0.0 0.0 0 DAYS MIN <= 32 2 3.7 -1.7 3 DAYS MIN <= 0 0 0.0 0.0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 7.41 2014 MINIMUM 0.33 1985 TOTALS 3.30 3.47 -0.17 2.25 DAILY AVG. 0.11 0.12 -0.01 0.08 DAYS >= .01 8 11.0 -3.0 9 DAYS >= .10 5 6.3 -1.3 4 DAYS >= .50 2 2.0 0.0 2 DAYS >= 1.00 2 0.8 1.2 0 GREATEST 24 HR. TOTAL 1.43 04/28 TO 04/29 1.12 STORM TOTAL 1.41 0.84 (MM/DD(HH)) SNOWFALL (INCHES) RECORDS TOTAL 4.0 1990 TOTALS 0.0 0.1 -0.1 T SINCE 7/1 0.4 21.0 -20.6 MM DAYS >= TRACE 0 0.1 -0.1 2 DAYS >= 1.0 0 0.0 0.0 0 GREATEST SNOW DEPTH 0 0 DEGREE DAYS HEATING TOTAL 213 320 -107 343 SINCE 7/1 3737 4477 -740 MM COOLING TOTAL 44 20 24 11 SINCE 1/1 45 22 23 MM .............................................................. WIND (MPH) AVERAGE WIND SPEED 7.5 HIGHEST WIND SPEED/DIRECTION 40/310 HIGHEST GUST SPEED/DIRECTION 68/290 SKY COVER AVERAGE SKY COVER 0.54 AVERAGE RH (PERCENT) 58 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 4 MIXED PRECIP 0 HEAVY RAIN 1 RAIN 4 LIGHT RAIN 11 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 7 FOG W/VIS <= 1/4 MILE 0 HAZE 1 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && APR 2023 TIED AS THE THIRD WARMEST APRIL ON RECORD. THE FIRST THREE WEEKS WERE ALSO EXCEPTIONALLY DRY WITH MOST OF THE RAINFALL FALLING IN THE LAST THREE DAYS OF THE MONTH. A PERSISTENT UPPER LEVEL RIDGE WAS THE CULPRIT OF THE EXCEPTIONALLY DRY PERIOD DURING THE FIRST THREE WEEKS OF THE MONTH. $$