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United States of America

ROCKVILLE, MARYLAND


Home > North America > United States > Maryland
Elevation: 127 meters     Latitude: 39 06N     Longitude: 077 06W

WEATHER
 
CURRENT CONDITIONS

 
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MONTHLY - ALL WEATHER AVERAGES   [ Show Summary ]
[ °F ]   °C
TEMPERATURE 
Average Temperature
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
C12.81.126.712.617.522.124.423.519.713.77.92.6

Average High Temperature
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
C18.65.97.312.719.223.928.130.329.325.719.913.67.4

Average Low Temperature
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
C7-3.8-3.30.7611.115.918.517.713.77.52.3-2.4

Highest Recorded Temperature
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
C40.625.627.831.737.836.138.940.64037.233.929.426.7

Lowest Recorded Temperature
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
C-25-25-24.4-17.2-7.8-2.21.73.33.9-2.2-6.7-12.2-24.4

Average Number of Days Above 90F/32C
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days24.9---------0.31.34.99.56.52.20.1------

Average Number of Days Below 32F/0C
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days98.723.520.915.13.60.3---------0.12.511.321.4

Average Number of Days Below 0F/-17C
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days0.70.40.3---------------------------0.1



PRECIPITATION 
Average Precipitation
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
mm102677679079101999910087747974

Average Number of Days With Precipitation
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days1079810101110997789

Most Precipitation Reported in a Day
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
mm.200.761.548.890.276.597.8200.7127114.3113.3110.788.957.9

Avg. No. of Days w/Precip. Above 0.2in/5mm
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days72667776665556

Avg. # of Days w/Precip. Above 0.4in/10mm
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days28222233332222

Avg. No. of Days w/Precip. Above 1in/25mm
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days10111111111111



PRECIPITATION - RAIN 
Most Rain Reported in a Month
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
mm1654208160204194227374249264289214198162

Least Rain Reported in a Month
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
mm6628629---17952---108



PRECIPITATION - SNOW 
Average Snowfall
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
cm.48.315.813.58.10.5------------------2.38.1

Most Snow Reported in a Month
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
cm.149.190.492.748.310.2------------------26.750.8



DEGREE DAYS 
Heating Degree Days
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days2829.4590.6496.1372.221076.711.7---3.338.3180.6335515

Cooling Degree Days
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days493.9------------25101.7169.4141.1506.7------

Growing Degree Days
Years on Record: 100  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days1942.5---------78.3232.5361.7446.1418.5290115.4------







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