Climatological Report (Monthly)
Issued by NWS Sterling, VA

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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
..............................................................

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.

$$


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