Climatological Report (Monthly)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
677 CXUS51 KLWX 041529 CLMIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1029 AM EST THU JAN 04 2024 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2023... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1960 TO 2024 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE NORMAL .............................................................. TEMPERATURE (F) RECORD HIGH 79 12/06/1998 LOW -4 12/25/1989 HIGHEST 62 12/28 66 -4 66 LOWEST 22 12/20 10 12 7 AVG. MAXIMUM 52.7 46.5 6.2 47.2 AVG. MINIMUM 33.3 29.0 4.3 26.6 MEAN 43.0 37.7 5.3 36.9 DAYS MAX >= 90 0 0.0 0.0 0 DAYS MAX <= 32 0 2.0 -2.0 1 DAYS MIN <= 32 15 21.8 -6.8 23 DAYS MIN <= 0 0 0.0 0.0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 6.74 1969 MINIMUM 0.32 2007 TOTALS 5.75 3.30 2.45 4.95 DAILY AVG. 0.19 0.11 0.08 0.16 DAYS >= .01 11 10.2 0.8 8 DAYS >= .10 8 6.3 1.7 5 DAYS >= .50 4 2.5 1.5 2 DAYS >= 1.00 2 0.7 1.3 2 GREATEST 24 HR. TOTAL 2.27 12/17 TO 12/18 2.28 STORM TOTAL 1.91 2.14 (MM/DD(HH)) SNOWFALL (INCHES) RECORDS TOTAL 24.2 1966 TOTALS 0.5 2.8 -2.3 T SINCE 7/1 0.5 3.1 -2.6 MM DAYS >= TRACE 1 1.6 -0.6 2 DAYS >= 1.0 0 0.9 -0.9 0 GREATEST SNOW DEPTH MM 0 DEGREE DAYS HEATING TOTAL 675 845 -170 862 SINCE 7/1 1446 1746 -300 MM COOLING TOTAL 0 0 0 0 SINCE 1/1 1380 1231 149 MM .............................................................. WIND (MPH) AVERAGE WIND SPEED 5.7 HIGHEST WIND SPEED/DIRECTION 36/290 HIGHEST GUST SPEED/DIRECTION 50/300 SKY COVER AVERAGE SKY COVER 0.63 AVERAGE RH (PERCENT) 68 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 1 MIXED PRECIP 0 HEAVY RAIN 4 RAIN 6 LIGHT RAIN 14 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 1 LIGHT SNOW 1 SLEET 0 FOG 14 FOG W/VIS <= 1/4 MILE 4 HAZE 3 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$