


WFO Monthly/Daily Climate Data
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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699 CXUS51 KLWX 060815 CF6IAD PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) STATION: WASHINGTON DULLES DC MONTH: APRIL YEAR: 2025 LATITUDE: 38 57 N LONGITUDE: 77 27 W TEMPERATURE IN F: :PCPN: SNOW: WIND :SUNSHINE: SKY :PK WND ================================================================================ 1 2 3 4 5 6A 6B 7 8 9 10 11 12 13 14 15 16 17 18 12Z AVG MX 2MIN DY MAX MIN AVG DEP HDD CDD WTR SNW DPTH SPD SPD DIR MIN PSBL S-S WX SPD DR ================================================================================ 1 57 38 48 -2 17 0 0.00 0.0 M 11.6 26 310 M M 3 37 290 2 57 34 46 -4 19 0 0.00 0.0 0 9.1 18 140 M M 8 27 140 3 76 51 64 14 1 0 0.03 0.0 M 9.4 20 210 M M 10 1 29 200 4 73 57 65 14 0 0 0.11 0.0 0 6.0 30 310 M M 9 13 43 300 5 80 54 67 16 0 2 0.00 0.0 0 6.2 14 60 M M 9 21 190 ================================================================================ SM 343 234 37 2 0.14 0.0 42.3 M 39 ================================================================================ AV 68.6 46.8 8.5 FASTST M M 8 MAX(MPH) MISC ----> 30 310 43 300 ================================================================================ NOTES: # LAST OF SEVERAL OCCURRENCES COLUMN 17 PEAK WIND IN M.P.H. PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) , PAGE 2 STATION: WASHINGTON DULLES DC MONTH: APRIL YEAR: 2025 LATITUDE: 38 57 N LONGITUDE: 77 27 W [TEMPERATURE DATA] [PRECIPITATION DATA] SYMBOLS USED IN COLUMN 16 AVERAGE MONTHLY: 57.7 TOTAL FOR MONTH: 0.14 1 = FOG OR MIST DPTR FM NORMAL: 7.3 DPTR FM NORMAL: -0.40 2 = FOG REDUCING VISIBILITY HIGHEST: 80 ON 5 GRTST 24HR 0.63 ON 31- 1 TO 1/4 MILE OR LESS LOWEST: 34 ON 2 3 = THUNDER SNOW, ICE PELLETS, HAIL 4 = ICE PELLETS TOTAL MONTH: 0.0 INCH 5 = HAIL GRTST 24HR 0.0 6 = FREEZING RAIN OR DRIZZLE GRTST DEPTH: 0 7 = DUSTSTORM OR SANDSTORM: VSBY 1/2 MILE OR LESS 8 = SMOKE OR HAZE [NO. OF DAYS WITH] [WEATHER - DAYS WITH] 9 = BLOWING SNOW X = TORNADO MAX 32 OR BELOW: 0 0.01 INCH OR MORE: 2 MAX 90 OR ABOVE: 0 0.10 INCH OR MORE: 1 MIN 32 OR BELOW: 0 0.50 INCH OR MORE: 0 MIN 0 OR BELOW: 0 1.00 INCH OR MORE: 0 [HDD (BASE 65) ] TOTAL THIS MO. 37 CLEAR (SCALE 0-3) 1 DPTR FM NORMAL -37 PTCLDY (SCALE 4-7) 0 TOTAL FM JUL 1 3809 CLOUDY (SCALE 8-10) 4 DPTR FM NORMAL -422 [CDD (BASE 65) ] TOTAL THIS MO. 2 DPTR FM NORMAL 2 [PRESSURE DATA] TOTAL FM JAN 1 19 HIGHEST SLP M ON M DPTR FM NORMAL 17 LOWEST SLP 29.69 ON 1 [REMARKS]