Our Proprietary 10-Day Forecast

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Current warnings over Potomac, Maryland
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<p>Warnings from F5Weather</a></div>

United States weather warnings are issued by various organizations under NOAA. Most from the National Weather Service, but also Storm Prediction Center and National Hurricane Center.

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Current radar over Potomac, Maryland red dot
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<p>Live radar from F5Weather</a></div>

Our radar is based off of US NEXRAD and Canadian weather radar sites through the quality controlled MRMS system. It compiles various sources for radar data and filters out erroneous returns such as sun spikes and ground clutter. We then colorize the precipitation based on our methods for determining precipitation type. Rain is in shades of green, mixed precipitation and freezing rain in shades of pink and snow is in shades of blue.

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Current satellite over Potomac, Maryland red dot
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<p>Live satellite from F5Weather</a></div>

Our satellite is from the GOES-16. It is color enhanced by using a geocolor terrain background during the day and black marble city lights at night. The daytime satellite data is Visible satellite imagery, and nighttime uses Infrared bands. The bluish clouds are fog and low cloud. The whiteest clouds are the coldest, highest cloud tops.

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Current surface weather map around Montgomery County, MD

This surface map is from the HRRR computer model. It is a 1-hour forecast, updated hourly, which is a good estimate of the current surface conditions. This map shows the current high and low pressure centers, pressure isobar contours, wind streamlines and thickness contours. It also shows the currently depicted preciptiation estimates, although this should not be a substitute for actual live radar. The purple dashed contour is the 5400m thickness line, which is often a good proxy for the rain/snow line.

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Temperatures right now near Potomac, Maryland

This is the latest surface temperatures as depicted by the HRRR computer model, updated hourly. Although these are not actual observations, this model is a very good representation of current conditions as it factors in observations, terrain and physics to give you more detailed temperatures in areas that do not have reporting weather stations. For the latest reports at specific locations, like in Potomac, MD please see our current conditions data on the left and right side of this page, or go to our current conditions page.

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Surface wind speed map over Potomac, MD

This map shows the latest HRRR computer model winds. This depiction of the current wind directions and speeds is an estimate from the computer model. For actual observations in Potomac, MD, see the current conditions data on the left and right side of this page, or go to our current conditions page.

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Regional 24 hour rainfall expected near Potomac, Maryland

This is a forecast of the amount of precipitation expected over the next 24 hours from the HRRR weather forecast model. This is only one forecast depiction, and you should check other models to get a better idea of what may happen. You can view this and other models in more detail on our main weather forecast maps page. There, you will also be able to look at forecasts beyond just 24 hours and look at forecasts out to as far as 16 days.

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Area snowfall accumulation expected around Montgomery County, Maryland

This is snowfall forecast, with amounts anticipated in the next 24 hours. This guidance is from the HRRR weather model. For more model forecasts out to 16 days, visit our main weather forecast maps page.

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These are Convective Outlooks from the Storm Prediction Center. Click to see Days 1-3 broken down into Tornado, Wind and Hail threats, as well as days 5-8 outlooks.

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Atlantic Hurricane and Tropical Storm Tracking Map
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<p>Hurricane Tracking from F5Weather</a></div>

Our hurricane tracking map monitors for any current or forecast tropical disturbances in the Atlantic. (See our Pacific Hurricane Tracker) Various hurricane models will draw a 'spaghetti plot' in the Atlantic Basin when a disturbance is forecast or exists, showing the system's forecast track. Once a storm has developed, the National Hurricane Center will forecast their official track. This will show up on the map along with the storm's current intensity, track and name. We will also plot some of the storm's vitals and of course the spaghetti plots from the models along with the NHC forecast track will give you an idea of where it's heading, and its forecast intensity with time.

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To view the latest computer models, visit f5wx.com for access to the weather maps and guidance that meteorologists use to make their forecasts.
 
Get access to:
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  • American GFS
  • Canadian GDPS GEM
  • German DWD ICON
  • British MetOffice's UKMET Unified Model
  • American NAM
  • American HRRR
  • American NBM - National Blend of Models
  • GEFS, GEPS, MOGREPS & European Ensembles
  • Probabilities & Averages
  • 3-Ensemble Mean & more!
View Skew-T soundings, textual data tables for your location, and of course maps! Weather forecast maps of the basics like temperature, wind, pressure, humidity, dew point, cloud cover, simulated radar, travel weather, rainfall and snow are available. More advanced users can also get use out of our severe weather & tornado threat maps, as well as upper air & shear graphics.
 
See the latest forecast data as the models update.
 
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Climate Summary
(made with AI, use with caution)
Potomac, Maryland Climate Summary

General Climate

    •   Humid subtropical climate with hot, humid summers and mild, wet winters.

Temperature

    •   Average annual temperature: 57.1°F (13.9°C)
    •   Average summer high: 87.8°F (31°C)
    •   Average summer low: 65.7°F (18.7°C)
    •   Average winter high: 42.9°F (6°C)
    •   Average winter low: 25.6°F (-3.6°C)

Precipitation

    •   Average annual precipitation: 42.5 inches (108 cm)
    •   Average number of rainy days per year: 108
    •   Heaviest rainfall occurs during the summer months.

Snowfall

    •   Average annual snowfall: 15.4 inches (39 cm)
    •   Snowfall is generally light and infrequent.

Humidity

    •   Potomac has high humidity throughout the year.
    •   Average annual relative humidity: 68%

Wind

    •   Prevailing wind direction: West
    •   Average wind speed: 9 mph (14 km/h)

Other Notable Climate Features

    •   Thunderstorms

Potomac experiences frequent thunderstorms, especially during the summer months.

    •   Tornadoes

Tornadoes are rare but can occur in the area.

    •   Heat Index

The heat index can reach dangerous levels during the summer months.

    •   Wind Chill

Wind chill can make temperatures feel much colder during the winter months.

Climate Change Impacts

    •   Potomac is experiencing the effects of climate change, including:
    •   Increasing temperatures
    •   More frequent and intense heat waves
    •   Heavier rainfall events
    •   Rising sea levels

Facts & Historical Information
(made with AI, use with caution)
Potomac, Maryland, boasts a rich natural and scientific heritage:

  • Potomac River:

    The town's namesake, the Potomac River, is a major waterway that has played a crucial role in the area's history, ecology, and economy.

  • Chesapeake & Ohio Canal National Historical Park:

    A portion of the park runs through Potomac, preserving the remnants of the historic canal that once connected the Potomac River to the Ohio River.

  • Great Falls Park:

    Just north of Potomac, this park offers stunning views of the Potomac River as it cascades over a series of waterfalls.

  • Albert Einstein:

    The renowned physicist lived in Potomac from 1943 until his death in 1955. His former home, now known as the Einstein House, is a designated National Historic Landmark.

  • Potomac Fever:

    A colloquial term for the enthusiasm and excitement surrounding the Washington, D.C. area's professional sports teams, particularly the Washington Nationals baseball team.

    • Tourist Attractions
    1.Glenstone Museum:

    A contemporary art museum featuring a collection of works by renowned artists such as Jackson Pollock, Mark Rothko, and Jeff Koons.

    2.National Mall (Washington, D.C.):

    A historic park in the heart of the nation's capital, home to iconic monuments like the Lincoln Memorial, Washington Monument, and World War II Memorial.

    3.Potomac River:

    A scenic river that offers opportunities for kayaking, fishing, and hiking along its banks.

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