Climatological Report (Monthly)
Issued by NWS Sterling, VA

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CXUS51 KLWX 020426
CLMIAD

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1126 PM EST FRI DEC 1 2017

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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF NOVEMBER 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              84   11/01/1982
                        11/02/1971
 LOW                9   11/24/1989
HIGHEST            77   11/03        75       2
LOWEST             21   11/11        19       2
AVG. MAXIMUM     56.5              57.5    -1.0     60.5
AVG. MINIMUM     34.8              35.3    -0.5     34.7
MEAN             45.7              46.4    -0.7
DAYS MAX >= 90      0               0.0     0.0
DAYS MAX <= 32      0               0.1    -0.1
DAYS MIN <= 32     14              12.4     1.6
DAYS MIN <= 0       0               0.0     0.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         7.83   1963
 MINIMUM         0.24   1981
TOTALS           1.99              3.41   -1.42     1.77
DAILY AVG.       0.07              0.11   -0.04
DAYS >= .01         9               9.1    -0.1
DAYS >= .10         4               5.5    -1.5
DAYS >= .50         2               2.4    -0.4
DAYS >= 1.00        0               0.9    -0.9
GREATEST
 24 HR. TOTAL    0.92   11/07 TO 11/07

SNOWFALL (INCHES)
RECORDS
 TOTAL           11.4   1967
TOTALS            0.0               0.5    -0.5
SINCE 7/1           T               0.5    -0.5
SNOWDEPTH AVG.      0
DAYS >= TRACE       0               0.3    -0.3
DAYS >= 1.0         0               0.1    -0.1
GREATEST
 SNOW DEPTH         0   MM
 24 HR TOTAL      0.0

DEGREE_DAYS
HEATING TOTAL     573               560      13      516
 SINCE 7/1        794               916    -122      727
COOLING TOTAL       1                 2      -1        2
 SINCE 1/1       1281              1178     103     1559
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              7.1
HIGHEST WIND SPEED/DIRECTION    38/290    DATE  11/19
HIGHEST GUST SPEED/DIRECTION    49/300    DATE  11/19

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY         12

AVERAGE RH (PERCENT)     70

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       3
LIGHT RAIN               12     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      2
HAZE                      1

-  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 45.7 DEGREES, WHICH IS 0.7
DEGREES BELOW THE 1981-2010 CLIMATOLOGICAL NORMAL. MONTHLY
PRECIPITATION WAS 1.99 INCHES, WHICH IS 1.42 INCHES (42 PERCENT)
BELOW THE 1981-2010 CLIMATOLOGICAL NORMAL. NO SNOW WAS RECORDED.

THERE WAS 0.92 INCHES OF RAIN ON NOVEMBER 7TH, MAKING IT THE WETTEST
ELECTION DAY ON RECORD. THE PREVIOUS WETTEST WAS 0.82 INCHES IN 1999.

A LOW TEMPERATURE OF 21 DEGREES WAS OBSERVED ON THE 11TH. THIS RANKS
AS THE SECOND COLDEST VETERAN`S DAY TEMPERATURE OBSERVED ON RECORD.
THE COLDEST WAS 16 IN 1973.

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).

$$

RCM


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