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
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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.
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