Climatological Report (Monthly)
Issued by NWS Sterling, VA

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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

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