Climatological Report (Monthly)
Issued by NWS Sterling, VA

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CXUS51 KLWX 091437 CCA
CLMDCA

CLIMATE REPORT...CORRECTED
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1037 AM EDT THU OCT 9 2014

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

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2014

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH             104   09/07/1881
 LOW               36   09/23/1904
HIGHEST            95   09/06        92       3
                        09/02
                        09/01
LOWEST             54   09/23        48       6
AVG. MAXIMUM     81.8              79.5     2.3       MM
AVG. MINIMUM     65.8              62.4     3.4       MM
MEAN             73.8              71.0     2.8
DAYS MAX >= 90      6               2.4     3.6
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        17.45   1934
 MINIMUM         0.11   2005
TOTALS           1.11              3.72   -2.61       MM
DAILY AVG.       0.04              0.12   -0.08
DAYS >= .01         6               8.3    -2.3
DAYS >= .10         3               5.5    -2.5
DAYS >= .50         1               2.4    -1.4
DAYS >= 1.00        0               1.0    -1.0
GREATEST
 24 HR. TOTAL    0.68   09/24 TO 09/25

DEGREE_DAYS
HEATING TOTAL       0                24     -24       MM
 SINCE 7/1          0                24     -24       MM
COOLING TOTAL     273               202      71       MM
 SINCE 1/1       1666              1513     153       MM
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              7.3
HIGHEST WIND SPEED/DIRECTION    26/320    DATE  09/02
HIGHEST GUST SPEED/DIRECTION    33/330    DATE  09/02

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            2
NUMBER OF DAYS PC             19
NUMBER OF DAYS CLOUDY          9

AVERAGE RH (PERCENT)     62

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       2
LIGHT RAIN                9     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       2     FOG W/VIS <= 1/4 MILE      0
HAZE                      8

-  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 IN WASHINGTON DC FOR SEPTEMBER 2014
WAS ABOVE NORMAL. PRECIPITATION WAS WELL BELOW NORMAL.

TOTAL PRECIPITATION TIED FOR THE 18TH DRIEST SEPTEMBER ON
RECORD...TIED WITH SEPTEMBER OF 1895.

THERE WERE SIX 90 DEGF DAYS THIS MONTH...MATCHING THE TOTAL OF 90
DEGF DAYS IN SEPTEMBER OF LAST YEAR. ON AVERAGE THERE ARE THREE 90
DEGF DAYS IN SEPTEMBER. THIS IS THE FIRST TIME THERE HAS BEEN AT
LEAST TWICE THE NORMAL NUMBER OF 90 DEGF DAYS IN THE MONTH OF
SEPTEMBER IN BACK-TO-BACK YEARS SINCE 1930-31.

$$

...CORRECTED FOR AVERAGE MONTHLY MINIMUM TEMPERATURE...




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