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Potomac, MD Weather

 
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The average temperature of Potomac is 54.62°F, which is about the same as the Maryland average temperature of 54.61°F and is about the same as the national average temperature of 54.45°F.

Topics:Heating Cost IndexCooling Cost IndexHistorical TemperatureHistorical PrecipitationHistorical SnowHistorical HumidityHistorical Wind Speed

Historical Weather

Heating Cost Index, #319

Potomac, MD
204.66
Maryland
211.25
U.S.
212.91

Cooling Cost Index, #212

Potomac, MD
109.16
Maryland
126.76
U.S.
139.42

The Heating Cost Index and the Cooling Cost Index are indicators of the relative heating and cooling cost of an area. They were calculated based on the average temperate and duration of the hot and cold days for the area. Please note, the actual heating cost and cooling cost are also dependent on other factors specific to individual residences such as the size of the house, the insulation condition, and the equipment efficiency, etc.

Average Temperature

Annual Average Temperature, #373
Potomac, MD
54.6 °F
Maryland
54.6 °F
U.S.
54.5 °F

Ranks: Average Max. Temperature: #463, Average Min. Temperature: #314

Precipitation

Average Annual Precipitation, #576
Potomac, MD
41.53 inches
Maryland
42.70 inches
U.S.
38.67 inches


Average Number of Days with 0.1 Inch or More Precipitation in a Year (this gives an indication of the number of days in a year that it is useful to have an umbrella), #365
Potomac, MD
74.56 days
Maryland
75.19 days
U.S.
66.51 days


Snow

Average Annual Snowfall, #298
Potomac, MD
19.84 inches
Maryland
20.61 inches
U.S.
23.27 inches


Average Number of Days with 1 Inch or More Snow Depth in a Year, #194
Potomac, MD
18.92 days
Maryland
17.59 days
U.S.
27.17 days


Humidity

Annual Average Humidity, #176
Potomac, MD
76.55%
Maryland
74.35%
U.S.
77.52%


Wind Speed

Annual Average Wind Speed, #54
Potomac, MD
36.94 mph
Maryland
19.74 mph
U.S.
16.93 mph


* The temperature, snow fall, and precipitation information on this page were calculated from the historical data of 18,000+ U.S weather stations for the period of time from 1980 to 2010. The humidity and wind speed information were calculated from data from 15,000 worldwide stations for the period of time from 1980 to 2010.


 
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