WFO Monthly/Daily Climate Data
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
921
CXUS51 KLWX 220815
CF6IAD
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)
STATION: WASHINGTON DULLES DC
MONTH: MAY
YEAR: 2025
LATITUDE: 38 57 N
LONGITUDE: 77 27 W
TEMPERATURE IN F: :PCPN: SNOW: WIND :SUNSHINE: SKY :PK WND
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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
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1 83 55 69 9 0 4 0.00 0.0 0 7.4 16 150 M M 7 24 150
2 85 65 75 15 0 10 T 0.0 0 5.8 15 300 M M 7 3 24 290
3 83 64 74 13 0 9 0.17 0.0 0 7.4 17 280 M M 7 13 25 190
4 76 62 69 8 0 4 0.34 0.0 0 7.1 18 210 M M 8 1 23 210
5 74 60 67 6 0 2 0.24 0.0 0 7.6 23 130 M M 8 13 34 140
6 71 57 64 3 1 0 0.12 0.0 0 5.6 21 290 M M 8 13 28 290
7 73 54 64 2 1 0 T 0.0 M 6.0 16 330 M M 7 25 300
8 77 52 65 3 0 0 0.01 0.0 0 2.3 16 220 M M 6 25 210
9 63 52 58 -4 7 0 0.55 0.0 0 9.9 18 350 M M 7 13 25 360
10 74 40 57 -5 8 0 0.00 0.0 0 7.6 20 300 M M 4 32 310
11 80 48 64 1 1 0 0.00 0.0 0 2.4 12 200 M M 7 16 200
12 76 50 63 0 2 0 0.01 0.0 0 5.2 13 150 M M 8 21 150
13 67 62 65 2 0 0 1.71 0.0 0 11.9 26 120 M M 10 1 36 130
14 73 62 68 4 0 3 0.10 0.0 0 5.1 12 80 M M 10 13 18 90
15 81 64 73 9 0 8 0.08 0.0 0 3.2 10 220 M M 7 1 14 200
16 89 65 77 13 0 12 T 0.0 0 4.6 14 340 M M 8 13 21 230
17 86 65 76 12 0 11 0.01 0.0 0 11.5 23 310 M M 6 32 240
18 77 62 70 6 0 5 0.00 0.0 0 10.1 21 310 M M 6 32 270
19 75 55 65 0 0 0 0.00 0.0 0 12.0 25 300 M M 2 35 320
20 70 53 62 -3 3 0 0.02 0.0 0 6.1 14 350 M M 6 20 350
21 59 54 57 -8 8 0 0.50 0.0 0 6.8 15 110 M M 10 1 22 130
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SM 1592 1201 31 68 3.86 0.0 145.6 M 149
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AV 75.8 57.2 6.9 FASTST M M 7 MAX(MPH)
MISC ----> 26 120 36 130
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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: MAY
YEAR: 2025
LATITUDE: 38 57 N
LONGITUDE: 77 27 W
[TEMPERATURE DATA] [PRECIPITATION DATA] SYMBOLS USED IN COLUMN 16
AVERAGE MONTHLY: 66.5 TOTAL FOR MONTH: 3.86 1 = FOG OR MIST
DPTR FM NORMAL: 3.8 DPTR FM NORMAL: 0.70 2 = FOG REDUCING VISIBILITY
HIGHEST: 89 ON 16 GRTST 24HR 1.72 ON 12-13 TO 1/4 MILE OR LESS
LOWEST: 40 ON 10 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: 13
MAX 90 OR ABOVE: 0 0.10 INCH OR MORE: 8
MIN 32 OR BELOW: 0 0.50 INCH OR MORE: 3
MIN 0 OR BELOW: 0 1.00 INCH OR MORE: 1
[HDD (BASE 65) ]
TOTAL THIS MO. 31 CLEAR (SCALE 0-3) 1
DPTR FM NORMAL -62 PTCLDY (SCALE 4-7) 16
TOTAL FM JUL 1 4044 CLOUDY (SCALE 8-10) 4
DPTR FM NORMAL -526
[CDD (BASE 65) ]
TOTAL THIS MO. 68
DPTR FM NORMAL 24 [PRESSURE DATA]
TOTAL FM JAN 1 115 HIGHEST SLP M ON M
DPTR FM NORMAL 49 LOWEST SLP 29.50 ON 17
[REMARKS]