Climatological Report (Monthly)
Issued by NWS Sterling, VA

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000
CXUS51 KLWX 030002
CLMDCA

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
802 PM EDT MON OCT 02 2023

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

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2023

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           99   09/05         92       7       91
LOWEST            55   09/28         48       7       51
AVG. MAXIMUM    81.6               80.7     0.9     81.6
AVG. MINIMUM    65.1               64.1     1.0     63.8
MEAN            73.4               72.4     1.0     72.7
DAYS MAX >= 90     6                3.6     2.4        2
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.0     0.0        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       17.45   1934
 MINIMUM        0.11   2005
TOTALS          3.60               3.93   -0.33     2.27
DAILY AVG.      0.12               0.13   -0.01     0.08
DAYS >= .01       11                8.7     2.3        8
DAYS >= .10        5                5.8    -0.8        4
DAYS >= .50        3                2.5     0.5        2
DAYS >= 1.00       1                1.0     0.0        0
GREATEST
 24 HR. TOTAL   2.01   09/23 TO 09/24               0.91
 STORM TOTAL    1.36                                0.86
 (MM/DD(HH))

SNOWFALL (INCHES)
RECORDS
 TOTAL            MM   MM
TOTALS           0.0                0.0     0.0      0.0
SINCE 7/1        0.0                0.0     0.0       MM
DAYS >= TRACE      0                0.0     0.0        0
DAYS >= 1.0        0                0.0     0.0        0
GREATEST
 SNOW DEPTH        0                                   0

DEGREE DAYS
HEATING TOTAL      9                 16      -7       17
 SINCE 7/1         9                 14      -5       MM
COOLING TOTAL    269                238      31      258
 SINCE 1/1      1635               1690     -55       MM
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              8.0
HIGHEST WIND SPEED/DIRECTION    30/100
                                30/040
HIGHEST GUST SPEED/DIRECTION    43/060

SKY COVER
AVERAGE SKY COVER           0.61

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       5
LIGHT RAIN               14     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       7     FOG W/VIS <= 1/4 MILE      0
HAZE                      3

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

&&

AFTER RECORD HEAT TO BEGIN THE MONTH, SEPTEMBER WOUND UP JUST ABOUT 1
DEGREE ABOVE NORMAL. THUNDERSTORMS JUST AFTER THE EARLY MONTH HEAT
BROKE, AND THE REMNANTS OF TROPICAL STORM OPHELIA LATE IN THE MONTH
WERE NOT ENOUGH TO KEEP PRECIPITATION FROM BEING JUST BELOW NORMAL.

$$

DHOF


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