Climatological Report (Monthly)
Issued by NWS Sterling, VA

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
000
CXUS51 KLWX 032028
CLMDCA

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
427 PM EDT WED AUG 3 2016

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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF JULY
2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1962 TO 2016

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           100   07/25        96       4
LOWEST             60   07/21        52       8
AVG. MAXIMUM     89.7              87.9     1.8     85.2
AVG. MINIMUM     69.2              65.5     3.7     66.8
MEAN             79.5              76.7     2.8
DAYS MAX >= 90     21              11.6     9.4
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         7.89   2005
 MINIMUM         0.94   1983
TOTALS           3.02              3.67   -0.65     4.89
DAILY AVG.       0.10              0.12   -0.02
DAYS >= .01        12              10.8     1.2
DAYS >= .10         7               6.5     0.5
DAYS >= .50         2               2.4    -0.4
DAYS >= 1.00        0               1.0    -1.0
GREATEST
 24 HR. TOTAL    1.33   07/28 TO 07/29

DEGREE_DAYS
HEATING TOTAL       0                 0       0        0
 SINCE 7/1          0                 0       0        0
COOLING TOTAL     459               363      96      347
 SINCE 1/1        810               692     118      806
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              5.6
HIGHEST WIND SPEED/DIRECTION    33/290    DATE  07/25
HIGHEST GUST SPEED/DIRECTION    43/290    DATE  07/25

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            4
NUMBER OF DAYS PC             22
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             11     MIXED PRECIP               0
HEAVY RAIN                5     RAIN                       6
LIGHT RAIN               14     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      13     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 DC...REAGAN NATIONAL AIRPORT...

THE MONTHLY AVERAGE TEMPERATURE WAS WELL ABOVE NORMAL...AND RANKED
AS THE 6TH WARMEST JULY ON RECORD. MONTHLY PRECIPITATION WAS BELOW
NORMAL.

A RECORD DAILY HIGH TEMPERATURE OF 100 DEGREES WAS SET ON THE
25TH...TYING THE RECORD PREVIOUSLY SET IN 1930. THIS WAS ALSO THE
FIRST TIME A TEMPERATURE OF 100 DEGREES WAS OBSERVED SINCE JULY 26TH
2012.

THREE RECORD DAILY HIGH MINIMUM TEMPERATURES WERE SET LAST MONTH.
THE LOW TEMPERATURE OF 81 DEGREES ON THE 25TH BROKE THE OLD RECORD
OF 79 SET IN 1965. THE LOW TEMPERATURE OF 80 DEGREES ON THE 26TH
BROKE THE OLD RECORD OF 79 SET IN 1987. THE LOW TEMPERATURE OF 81 ON
THE 27TH TIED THE RECORD PREVIOUSLY SET IN 1930.

THE STRETCH OF FOUR CONSECUTIVE DAYS FROM THE 24TH THROUGH THE 27TH
WHERE THE LOW TEMPERATURE FAILED TO DROP BELOW 80 DEGREES TIED FOR
THE 2ND LONGEST STREAK ON RECORD. IT ALSO HAPPENED IN JULY 2011 FROM
THE 21ST THROUGH THE 24TH. THE RECORD IS FIVE CONSECUTIVE DAYS WHICH
WAS SET FROM JULY 16TH THROUGH JULY 20TH 2012.

EACH DAY FROM JULY 22ND THROUGH JULY 28TH HAD A HIGH TEMPERATURE OF
95 DEGREES OR HIGHER. THIS TIES WITH FIVE OTHER YEARS FOR THE 5TH
LONGEST STREAK ON RECORD. THE RECORD IS 11 CONSECUTIVE DAYS SET FROM
JUNE 28TH THROUGH JULY 8TH 2012.

THE HIGH OF 74 ON THE 4TH TIED WITH 1927 AND 1909 AS THE 5TH COOLEST
HIGH TEMPERATURE OBSERVED ON INDEPENDENCE DAY.

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

$$

DH/SMZ



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.