Climatological Report (Monthly)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
660 CXUS51 KLWX 011356 CLMIAD CLIMATE REPORT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 956 AM EDT TUE OCT 01 2024 ................................... ...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2024... 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 100 09/06/2023 LOW 30 09/24/1974 HIGHEST 86 09/01 91 -5 100 09/11 09/20 LOWEST 43 09/09 39 4 49 AVG. MAXIMUM 78.1 79.3 -1.2 82.1 AVG. MINIMUM 59.7 57.9 1.8 60.6 MEAN 68.9 68.6 0.3 71.3 DAYS MAX >= 90 0 3.1 -3.1 9 DAYS MAX <= 32 0 0.0 0.0 0 DAYS MIN <= 32 0 0.0 0.0 0 DAYS MIN <= 0 0 0.0 0.0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 11.26 1975 MINIMUM 0.15 2005 TOTALS 3.27 3.94 -0.67 6.65 DAILY AVG. 0.11 0.13 -0.02 0.22 DAYS >= .01 11 9.0 2.0 13 DAYS >= .10 6 5.9 0.1 8 DAYS >= .50 2 2.5 -0.5 5 DAYS >= 1.00 1 1.2 -0.2 3 GREATEST 24 HR. TOTAL 1.70 09/25 TO 09/26 2.25 STORM TOTAL 1.69 1.51 (MM/DD(HH)) SNOWFALL (INCHES) RECORDS TOTAL MM 2023 TOTALS 0.0 0.0 0.0 T SINCE 7/1 0.0 0.0 0.0 MM DAYS >= TRACE 0 0.0 0.0 2 DAYS >= 1.0 0 0.0 0.0 0 GREATEST SNOW DEPTH 0 0 DEGREE DAYS HEATING TOTAL 12 45 -33 16 SINCE 7/1 14 44 -30 MM COOLING TOTAL 137 152 -15 216 SINCE 1/1 1551 1208 343 MM .............................................................. WIND (MPH) AVERAGE WIND SPEED 5.7 HIGHEST WIND SPEED/DIRECTION 22/110 HIGHEST GUST SPEED/DIRECTION 34/120 SKY COVER AVERAGE SKY COVER 0.63 AVERAGE RH (PERCENT) 74 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 2 MIXED PRECIP 0 HEAVY RAIN 4 RAIN 2 LIGHT RAIN 14 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 15 FOG W/VIS <= 1/4 MILE 1 HAZE 2 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$