Climatological Report (Monthly)
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
659
CXUS51 KLWX 011356
CLMDCA
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
956 AM EDT TUE OCT 01 2024
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...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2024...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2024
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 104 09/07/1881
LOW 36 09/23/1904
HIGHEST 87 09/10 92 -5 99
LOWEST 56 09/09 48 8 55
AVG. MAXIMUM 79.7 80.7 -1.0 81.6
AVG. MINIMUM 65.3 64.1 1.2 65.1
MEAN 72.5 72.4 0.1 73.4
DAYS MAX >= 90 0 3.6 -3.6 6
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 17.45 1934
MINIMUM 0.11 2005
TOTALS 2.31 3.93 -1.62 3.60
DAILY AVG. 0.08 0.13 -0.05 0.12
DAYS >= .01 13 8.7 4.3 11
DAYS >= .10 6 5.8 0.2 5
DAYS >= .50 1 2.5 -1.5 3
DAYS >= 1.00 0 1.0 -1.0 1
GREATEST
24 HR. TOTAL 0.59 09/25 TO 09/26 2.01
STORM TOTAL 0.57 1.36
(MM/DD(HH))
SNOWFALL (INCHES)
RECORDS
TOTAL MM MM
TOTALS 0.0 0.0 0.0 0.0
SINCE 7/1 0.0 0.0 0.0 MM
DAYS >= TRACE 0 0.0 0.0 0
DAYS >= 1.0 0 0.0 0.0 0
GREATEST
SNOW DEPTH 0 0
DEGREE DAYS
HEATING TOTAL 0 16 -16 9
SINCE 7/1 0 14 -14 MM
COOLING TOTAL 233 238 -5 269
SINCE 1/1 1948 1690 258 MM
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WIND (MPH)
AVERAGE WIND SPEED 7.6
HIGHEST WIND SPEED/DIRECTION 29/330
HIGHEST GUST SPEED/DIRECTION 39/340
SKY COVER
AVERAGE SKY COVER 0.68
AVERAGE RH (PERCENT) 68
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 MIXED PRECIP 0
HEAVY RAIN 4 RAIN 7
LIGHT RAIN 16 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 12 FOG W/VIS <= 1/4 MILE 1
HAZE 1
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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