Climatological Report (Monthly)
Issued by NWS Sterling, VA

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CXUS51 KLWX 041058
CLMIAD

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
658 AM EDT TUE AUG 4 2015

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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF JULY 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1962 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH             105   07/22/2011
 LOW               41   07/01/1988
HIGHEST            94   07/19        96      -2
LOWEST             58   07/24        52       6
AVG. MAXIMUM     85.2              87.9    -2.7     84.5
AVG. MINIMUM     66.8              65.5     1.3     63.8
MEAN             76.0              76.7    -0.7
DAYS MAX >= 90      3              11.6    -8.6
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         7.89   2005
 MINIMUM         0.94   1983
TOTALS           4.89              3.67    1.22     2.09
DAILY AVG.       0.16              0.12    0.04
DAYS >= .01        12              10.8     1.2
DAYS >= .10         6               6.5    -0.5
DAYS >= .50         4               2.4     1.6
DAYS >= 1.00        2               1.0     1.0
GREATEST
 24 HR. TOTAL    1.60   07/08 TO 07/08
                        07/07 TO 07/08
                        07/08 TO 07/08

DEGREE_DAYS
HEATING TOTAL       0                 0       0        3
 SINCE 7/1          0                 0       0        3
COOLING TOTAL     347               363     -16      296
 SINCE 1/1        806               692     114      614
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              4.8
HIGHEST WIND SPEED/DIRECTION    32/290    DATE  07/30
HIGHEST GUST SPEED/DIRECTION    44/280    DATE  07/30

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            3
NUMBER OF DAYS PC             21
NUMBER OF DAYS CLOUDY          7

AVERAGE RH (PERCENT)     74

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                6     RAIN                       7
LIGHT RAIN               17     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      16     FOG W/VIS <= 1/4 MILE      4
HAZE                      4

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

&&

DULLES INTERNATIONAL AIRPORT...

THE MONTHLY AVERAGE TEMPERATURE WAS SLIGHTLY BELOW NORMAL. MONTHLY
PRECIPITATION WAS ABOVE NORMAL.

THERE WERE THREE DAYS WHERE THE TEMPERATURE REACHED OR EXCEEDED 90
DEGREES. THIS IS THE FEWEST IN THE MONTH OF JULY SINCE 2004.

A RECORD DAILY HIGH MINIMUM TEMPERATURE RECORD OF 75 DEGREES WAS SET
ON THE 20TH...TYING THE RECORD SET IN 2013...2011 AND 1994.

A DAILY MAXIMUM RAINFALL RECORD OF 1.15 INCHES WAS SET ON THE
30TH...BREAKING THE OLD RECORD OF 0.66 SET IN 1970.

$$


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