Climatological Report (Monthly) Issued by NWS Sterling, VA
000
CXUS51 KLWX 030002
CLMIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
802 PM EDT MON OCT 02 2023
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2023...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2023
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 100R 09/06 91 9 90
LOWEST 49 09/16 39 10 41
09/20
AVG. MAXIMUM 82.1 79.3 2.8 80.2
AVG. MINIMUM 60.6 57.9 2.7 58.5
MEAN 71.3 68.6 2.8 69.3
DAYS MAX >= 90 9 3.1 5.9 1
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 6.65 3.94 2.71 3.28
DAILY AVG. 0.22 0.13 0.09 0.11
DAYS >= .01 13 9.0 4.0 8
DAYS >= .10 8 5.9 2.1 6
DAYS >= .50 5 2.5 2.5 3
DAYS >= 1.00 3 1.2 1.8 1
GREATEST
24 HR. TOTAL 2.25 09/23 TO 09/24 1.29
STORM TOTAL 1.51 1.17
(MM/DD(HH))
SNOWFALL (INCHES)
RECORDS
TOTAL MM MM
TOTALS T 0.0 0.0 0.0
SINCE 7/1 T 0.0 0.0 MM
DAYS >= TRACE 2 0.0 2.0 0
DAYS >= 1.0 0 0.0 0.0 0
GREATEST
SNOW DEPTH 0 0
DEGREE DAYS
HEATING TOTAL 16 45 -29 39
SINCE 7/1 16 44 -28 MM
COOLING TOTAL 216 152 64 176
SINCE 1/1 1331 1208 123 MM
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WIND (MPH)
AVERAGE WIND SPEED 6.4
HIGHEST WIND SPEED/DIRECTION 37/300
HIGHEST GUST SPEED/DIRECTION 49/290
SKY COVER
AVERAGE SKY COVER 0.57
AVERAGE RH (PERCENT) 66
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 5 MIXED PRECIP 0
HEAVY RAIN 5 RAIN 4
LIGHT RAIN 13 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 2
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 12 FOG W/VIS <= 1/4 MILE 0
HAZE 6
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
&&
AFTER RECORD HEAT TO BEGIN THE MONTH, SEPTEMBER WOUND UP JUST SHY OF 3
DEGREES ABOVE NORMAL. MULTIPLE THUNDERSTORMS JUST AFTER THE EARLY MONTH
HEAT BROKE HELPED PUSH MONTHLY PRECIPITATION WELL ABOVE NORMAL.
THE HIGH TEMPERATURE OF 100 ON SEPTEMBER 6TH WAS THE HOTTEST TEMPERATURE
EVER RECORDED IN THE MONTH OF SEPTEMBER.
$$
DHOF