Our Proprietary 10-Day Forecast

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Current warnings over Saint James, 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 Saint James, 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 Saint James, 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 St. Mary

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 Saint James, 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 Saint James, 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 Saint James, 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 Saint James, 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 Saint James, 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 St. Mary

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.
 
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  • American GFS
  • Canadian GDPS GEM
  • German DWD ICON
  • British MetOffice's UKMET Unified Model
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  • American HRRR
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  • 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)
Saint James, Maryland Climate Summary

General Climate

    •   Humid subtropical climate (Köppen Cfa)
    •   Mild winters with occasional snow
    •   Hot, humid summers with frequent thunderstorms

Temperature

    •   Average Annual Temperature

58.2°F (14.6°C)

    •   Average January Temperature

33.5°F (0.8°C)

    •   Average July Temperature

77.9°F (25.5°C)

    •   Record High Temperature

105°F (40.6°C)

    •   Record Low Temperature

-12°F (-24.4°C)

Precipitation

    •   Average Annual Precipitation

44.8 inches (1138 mm)

    •   Average Monthly Precipitation (January)

3.4 inches (86 mm)

    •   Average Monthly Precipitation (July)

4.6 inches (117 mm)

    •   Average Snowfall

12.5 inches (32 cm)

Humidity

    •   Average Annual Relative Humidity

70%

Wind

    •   Prevailing Wind Direction

West-southwest

    •   Average Wind Speed

8.5 mph (13.7 km/h)

Other Climate Features

    •   Growing Season

220 days

    •   Hardiness Zone

7a

    •   Tornadoes

Occasional, but less frequent than in the central United States

Climate Extremes

    •   Extreme Heat

Temperatures can reach or exceed 100°F (37.8°C) during heat waves.

    •   Extreme Cold

Temperatures can drop below 0°F (-17.8°C) during cold snaps.

    •   Heavy Rain

Thunderstorms can produce intense rainfall, leading to localized flooding.

    •   Winter Storms

Snowstorms can occur, but they are typically not severe.

Climate Change Impacts

    •   Rising Temperatures

Average temperatures are projected to increase by 2-4°F (1.1-2.2°C) by mid-century.

    •   Increased Precipitation

Annual precipitation is expected to increase by 5-10% by mid-century.

    •   More Extreme Weather Events

Heat waves, heavy rain events, and sea level rise are projected to become more frequent and intense.

Facts & Historical Information
(made with AI, use with caution)
Natural History

    •   Saint James is home to the Antietam National Battlefield, a Civil War site with diverse flora and fauna, including bald eagles, ospreys, and white-tailed deer.

    •   The town is situated along Antietam Creek, a tributary of the Potomac River, providing habitat for aquatic species.

    •   The surrounding countryside is a mix of forests, meadows, and farmland, supporting a variety of bird and wildlife.

Science

    •   Saint James was the birthplace of John Wesley Powell, the geologist who led the first expedition to explore the Grand Canyon.

    •   The town is home to the Chesapeake Bay Observatory, a research facility studying the health of the Chesapeake Bay and its ecosystem.

Personalities

    •   In addition to Powell, Saint James has been home to notable figures such as:

    •   James Rumsey, an inventor who built one of the first successful steamboats.

    •   Alexander Schmucker, a theologian and educator who founded the Theological Seminary of the Evangelical Lutheran Church.

    •   Barbara Fritchie, a local legend who is said to have waved a Union flag at Confederate troops during the Civil War.

Tourist Attractions
1.Antietam National Battlefield

(Sharpsburg, MD): A historic site commemorating the bloodiest single-day battle in American history, fought during the Civil War.

2.Harper's Ferry National Historical Park

(Harper's Ferry, WV): A historic town and park that played a significant role in the abolitionist movement and the Civil War.

3.Catoctin Mountain Park

(Thurmont, MD): A scenic mountain park with hiking trails, waterfalls, and camping facilities.

Nearby Cities:

Lexington Park, MD
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California, MDLeonardtown, MD
Lusby, MDLong Beach, MD
Baltimore, MD
Washington, DCVirginia Beach, VA
Norfolk, VAChesapeake, VA
Richmond, VAArlington, VA
Newport News, VAAlexandria, VA
East Hampton, VAHampton, VA
Columbia, MD