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000
CXUS51 KLWX 012138
CLMIAD

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
538 PM EDT WED NOV 01 2023

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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             96   10/02/2019
 LOW              15   10/24/1969
HIGHEST           86   10/28         83       3       80
LOWEST            34   10/24         27       7       31
AVG. MAXIMUM    72.5               67.8     4.7     66.7
AVG. MINIMUM    47.8               45.3     2.5     43.3
MEAN            60.2               56.6     3.6     55.0
DAYS MAX >= 90     0                0.2    -0.2        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                2.4    -2.4        2
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        9.22   2005
 MINIMUM           T   1963
TOTALS          0.67               3.65   -2.98     2.24
DAILY AVG.      0.02               0.12   -0.10     0.07
DAYS >= .01        7                8.1    -1.1        8
DAYS >= .10        2                5.1    -3.1        6
DAYS >= .50        0                2.4    -2.4        2
DAYS >= 1.00       0                1.2    -1.2        0
GREATEST
 24 HR. TOTAL   0.34   10/14 TO 10/15               0.90
 STORM TOTAL    0.32                                0.62
 (MM/DD(HH))

SNOWFALL (INCHES)
RECORDS
 TOTAL           1.3   1979
TOTALS           0.0                0.0     0.0      0.0
SINCE 7/1          T                0.0     0.0       MM
DAYS >= TRACE      0                0.0     0.0       MM
DAYS >= 1.0        0                0.0     0.0       MM
GREATEST
 SNOW DEPTH        0                                   0

DEGREE DAYS
HEATING TOTAL    190                284     -94      302
 SINCE 7/1       206                329    -123       MM
COOLING TOTAL     49                 22      27        0
 SINCE 1/1      1380               1230     150       MM
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              5.6
HIGHEST WIND SPEED/DIRECTION    30/290
                                30/310
HIGHEST GUST SPEED/DIRECTION    43/310

SKY COVER
AVERAGE SKY COVER           0.50

AVERAGE RH (PERCENT)     66

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       0
LIGHT RAIN               10     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      11     FOG W/VIS <= 1/4 MILE      1
HAZE                      3

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

&&

OCT 2023 WAS THE SEVENTH WARMEST OCT ON RECORD. THE MONTH HAD
TWO STRETCHES OF WELL ABOVE NORMAL TEMPERATURES, ONE AT THE
START OF THE MONTH AND ANOTHER ONE AT THE END OF THE MONTH, WITH
HIGH TEMPERATURES WELL ABOVE 80 DEGREES. IN TERMS OF PRECIPITATION,
OCT 2023 ENDED AS THE FOURTH DRIEST ON RECORD. A PERSISTENT
UPPER LEVEL RIDGE RESULTED IN VERY WARM AND DRY CONDITIONS
THROUGHOUT THE MONTH.

$$
LFR