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000
CXUS51 KLWX 011445
CLMBWI

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1045 AM EDT FRI OCT 01 2021

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

...THE BALTIMORE MD CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2021...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2021

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH            101   09/07/1881
 LOW              35   09/25/1963
HIGHEST           91   09/15         92      -1       90
LOWEST            50   09/25         43       7       40
AVG. MAXIMUM    81.9               79.7     2.2     78.3
AVG. MINIMUM    61.0               58.8     2.2     59.3
MEAN            71.4               69.2     2.3     68.8
DAYS MAX >= 90     2                2.8    -0.8        1
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       13.32   2011
 MINIMUM        0.09   1884
TOTALS          6.04               4.44    1.60     4.48
DAILY AVG.      0.20               0.15    0.05     0.15
DAYS >= .01       10                9.1     0.9       13
DAYS >= .10        6                5.7     0.3        7
DAYS >= .50        2                2.7    -0.7        4
DAYS >= 1.00       1                1.1    -0.1        1
GREATEST
 24 HR. TOTAL   4.13   09/01 TO 09/01               1.57
 STORM TOTAL    4.13                                1.57
 (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      7                 36     -29       45
 SINCE 7/1         7                 33     -26       MM
COOLING TOTAL    206                163      43      168
 SINCE 1/1      1614               1297     317       MM
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              5.8
HIGHEST WIND SPEED/DIRECTION    23/140
HIGHEST GUST SPEED/DIRECTION    40/340

SKY COVER
AVERAGE SKY COVER           0.48

AVERAGE RH (PERCENT)     68

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                6     RAIN                       4
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      10     FOG W/VIS <= 1/4 MILE      1
HAZE                      2

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

&&

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

BALTIMORE MD...BALTIMORE-WASHINGTON INTERNATIONAL THURGOOD MARSHALL
AIRPORT...

THE AVERAGE TEMPERATURE IN SEPTEMBER 2021 WAS ABOVE NORMAL. IT WAS
THE WARMEST SEPTEMBER SINCE 2019, WHEN THE AVERAGE TEMPERATURE WAS
73.8 DEGREES.

TOTAL PRECIPITATION WAS 136 PERCENT OF NORMAL. IT WAS THE WETTEST
SEPTEMBER SINCE 2018, WHEN 9.19 INCHES OF PRECIPITATION FELL.

A DAILY PRECIPITATION RECORD WAS SET ON SEPTEMBER 1ST WHEN 4.13
INCHES FELL. THIS BROKE THE OLD RECORD OF 3.96 INCHES FROM 1952.

WEATHER RECORDS FOR THE BALTIMORE MD AREA HAVE BEEN RECORDED AT WHAT
IS NOW BALTIMORE-WASHINGTON INTERNATIONAL THURGOOD MARSHALL AIRPORT
SINCE 1950. THE OFFICIAL WEATHER RECORD CONSISTS OF THAT DATA BACK
TO 1950, AND OBSERVATIONS TAKEN IN DOWNTOWN BALTIMORE FROM 1871
THROUGH 1949. TEMPERATURE RECORDS FOR THE BALTIMORE MD AREA EXTEND
BACK TO JULY OF 1872. PRECIPITATION RECORDS EXTEND BACK TO JANUARY
OF 1871. SNOWFALL RECORDS BEGAN IN MARCH OF 1892.

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

$$

RCM