Climatological Report (Monthly)
Issued by NWS Sterling, VA

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000
CXUS51 KLWX 020135 RRA
CLMIAD

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
935 PM EDT SAT JUL 1 2017

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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF JUNE 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1960 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH             102   06/29/2012
 LOW               36   06/08/1977
HIGHEST            95   06/13        93       2
LOWEST             50   06/28        45       5
                        06/08
AVG. MAXIMUM     84.3              83.8     0.5     83.9
AVG. MINIMUM     61.9              61.0     0.9     62.3
MEAN             73.1              72.4     0.7
DAYS MAX >= 90      6               5.6     0.4
DAYS MAX <= 32      0               0.0     0.0
DAYS MIN <= 32      0               0.0     0.0
DAYS MIN <= 0       0               0.0     0.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        18.19   1972
 MINIMUM         0.52   1988
TOTALS           1.28              3.98   -2.70     6.35
DAILY AVG.       0.04              0.13   -0.09
DAYS >= .01         5              10.9    -5.9
DAYS >= .10         4               6.6    -2.6
DAYS >= .50         1               2.6    -1.6
DAYS >= 1.00        0               1.0    -1.0
GREATEST
 24 HR. TOTAL    0.62   06/19 TO 06/19

DEGREE_DAYS
HEATING TOTAL       6                15      -9        3
 SINCE 7/1       3858              4717    -859     4039
COOLING TOTAL     256               237      19      253
 SINCE 1/1        393               329      64      351
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.9
HIGHEST WIND SPEED/DIRECTION    29/250    DATE  06/19
HIGHEST GUST SPEED/DIRECTION    40/250    DATE  06/19

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            4
NUMBER OF DAYS PC             22
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     65

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       2
LIGHT RAIN                7     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      0
HAZE                      0

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

WASHINGTON DULLES INTERNATIONAL AIRPORT...

THE MONTHLY AVERAGE TEMPERATURE WAS SLIGHTLY ABOVE NORMAL. MONTHLY
PRECIPITATION WAS WELL BELOW NORMAL...AND RANKED AS THE
4TH DRIEST JUNE ON RECORD.

A RECORD DAILY HIGH TEMPERATURE OF 95 DEGREES WAS SET ON THE
13TH...BREAKING THE RECORD OF 94 SET IN 1994.

A RECORD DAILY WARM LOW TEMPERATURE OF 73 DEGREES WAS SET ON THE
18TH...BREAKING THE RECORD OF 71 SET IN 2014.

TEMPERATURE AND PRECIPITATION RECORDS AT WASHINGTON DULLES
INTERNATIONAL AIRPORT BEGAN IN 1960. SNOWFALL RECORDS BEGAN IN 1962.

ALL CLIMATE DATA ARE CONSIDERED PRELIMINARY UNTIL REVIEWED BY THE
NATIONAL CENTERS FOR ENVIRONMENTAL INFORMATION (NCEI).

$$

DH/HTS


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