Climatological Report (Monthly)
Issued by NWS Sterling, VA

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CXUS51 KLWX 011938
CLMBWI

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
338 PM EDT TUE JUN 01 2021

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

...THE BALTIMORE MD CLIMATE SUMMARY FOR THE MONTH OF MAY 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             98   05/30/2011
                       05/30/1991
                       05/19/1962
 LOW              32   05/11/1966
HIGHEST           95   05/23         90       5       88
LOWEST            40   05/13         39       1       34
AVG. MAXIMUM    76.7               75.5     1.2     71.7
AVG. MINIMUM    51.2               53.3    -2.1     52.5
MEAN            64.0               64.4    -0.4     62.1
DAYS MAX >= 90     3                2.1     0.9        0
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        8.71   1989
 MINIMUM        0.37   1986
TOTALS          3.63               3.85   -0.22     1.76
DAILY AVG.      0.12               0.12   -0.00     0.06
DAYS >= .01       12               11.9     0.1       10
DAYS >= .10        9                7.0     2.0        5
DAYS >= .50        3                2.7     0.3        0
DAYS >= 1.00       0                0.9    -0.9        0
GREATEST
 24 HR. TOTAL   1.41   05/28 TO 05/29               1.26
 STORM TOTAL    0.95                                0.36
 (MM/DD(HH))

SNOWFALL (INCHES)
RECORDS
 TOTAL             T   1963
TOTALS           0.0                0.0     0.0      0.0
SINCE 7/1       10.9               19.3    -8.4       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    123                109      14      168
 SINCE 7/1      3952               4475    -523       MM
COOLING TOTAL     99                 90       9       85
 SINCE 1/1       132                111      21       MM
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.5
HIGHEST WIND SPEED/DIRECTION    29/290
HIGHEST GUST SPEED/DIRECTION    40/270

SKY COVER
AVERAGE SKY COVER           0.61

AVERAGE RH (PERCENT)     59

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       5
LIGHT RAIN               12     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      0
HAZE                      6

-  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 MAY 2021 WAS SLIGHTLY BELOW NORMAL. IT WAS
THE WARMEST MAY SINCE 2019, WHEN THE AVERAGE TEMPERATURE WAS 68.3
DEGREES.

TOTAL PRECIPITATION WAS 94 PERCENT OF NORMAL. IT WAS THE WETTEST
MAY SINCE 2019, WHEN 5.51 INCHES OF PRECIPITATION FELL.

A RECORD WARM LOW TEMPERATURE OF 70 DEGREES WAS SET ON MAY 23RD.
THIS BROKE THE OLD RECORD OF 69 DEGREES SET IN 2004.

A RECORD HIGH TEMPERATURE OF 94 DEGREES WAS SET ON MAY 26TH. THIS
TIED THE RECORD PREVIOUSLY SET IN 1914.

A RECORD COOL HIGH TEMPERATURE OF 56 DEGREES WAS SET ON MAY 29TH.
THIS BROKE THE OLD RECORD OF 57 DEGREES SET IN 2014.

A RECORD COOL HIGH TEMPERATURE OF 57 DEGREES WAS SET ON MAY 30TH.
THIS BROKE THE OLD RECORD OF 58 DEGREES SET IN 1915.

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


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