Climatological Report (Monthly) Issued by NWS Sterling, VA
000
CXUS51 KLWX 121745 CCA
CLMIAD
CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
145 PM EDT WED MAY 12 2023
...................................
...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF APRIL 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 93 04/06/2010
04/17/2002
LOW 17 04/01/1969
HIGHEST 88 04/05 85 3 86
04/20
04/21
LOWEST 30 04/09 25 5 30
AVG. MAXIMUM 72.7 66.8 5.9 65.3
AVG. MINIMUM 45.6 43.2 2.4 42.1
MEAN 59.1 55.0 4.1 53.7
DAYS MAX >= 90 0 0.4 -0.4 0
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 2 3.7 -1.7 3
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 7.41 2014
MINIMUM 0.33 1985
TOTALS 3.30 3.47 -0.17 2.25
DAILY AVG. 0.11 0.12 -0.01 0.08
DAYS >= .01 8 11.0 -3.0 9
DAYS >= .10 5 6.3 -1.3 4
DAYS >= .50 2 2.0 0.0 2
DAYS >= 1.00 2 0.8 1.2 0
GREATEST
24 HR. TOTAL 1.43 04/28 TO 04/29 1.12
STORM TOTAL 1.41 0.84
(MM/DD(HH))
SNOWFALL (INCHES)
RECORDS
TOTAL 4.0 1990
TOTALS 0.0 0.1 -0.1 T
SINCE 7/1 0.4 21.0 -20.6 MM
DAYS >= TRACE 0 0.1 -0.1 2
DAYS >= 1.0 0 0.0 0.0 0
GREATEST
SNOW DEPTH 0 0
DEGREE DAYS
HEATING TOTAL 213 320 -107 343
SINCE 7/1 3737 4477 -740 MM
COOLING TOTAL 44 20 24 11
SINCE 1/1 45 22 23 MM
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WIND (MPH)
AVERAGE WIND SPEED 7.5
HIGHEST WIND SPEED/DIRECTION 40/310
HIGHEST GUST SPEED/DIRECTION 68/290
SKY COVER
AVERAGE SKY COVER 0.54
AVERAGE RH (PERCENT) 58
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 4
LIGHT RAIN 11 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 7 FOG W/VIS <= 1/4 MILE 0
HAZE 1
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
&&
APR 2023 TIED AS THE THIRD WARMEST APRIL ON RECORD. THE FIRST THREE
WEEKS WERE ALSO EXCEPTIONALLY DRY WITH MOST OF THE RAINFALL FALLING
IN THE LAST THREE DAYS OF THE MONTH. A PERSISTENT UPPER LEVEL RIDGE
WAS THE CULPRIT OF THE EXCEPTIONALLY DRY PERIOD DURING THE FIRST
THREE WEEKS OF THE MONTH.
$$