Our Proprietary 10-Day Forecast

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Current warnings over Princeton Junction, New Jersey
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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 Princeton Junction, New Jersey 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 Princeton Junction, New Jersey 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 Mercer County, NJ

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 Princeton Junction, New Jersey

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 Princeton Junction, NJ 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 Princeton Junction, NJ

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 Princeton Junction, NJ, 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 Princeton Junction, New Jersey

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 Mercer County, New Jersey

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:
  • European ECMWF HRES
  • 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)
Princeton Junction, NJ Climate Summary

General Climate

    •   Humid subtropical climate with hot, humid summers and cold, snowy winters.

Temperature

    •   Average annual temperature: 53.8°F (12.1°C)
    •   Average summer temperature (June-August): 75.8°F (24.3°C)
    •   Average winter temperature (December-February): 32.6°F (0.3°C)
    •   Record high temperature: 106°F (41.1°C)
    •   Record low temperature: -16°F (-26.7°C)

Precipitation

    •   Average annual precipitation: 44.9 inches (1,140 mm)
    •   Average snowfall: 25.7 inches (65.3 cm)
    •   Rainiest month: July (4.7 inches)
    •   Driest month: February (2.7 inches)

Humidity

    •   Average relative humidity: 69%
    •   Highest humidity: July-August (75%)
    •   Lowest humidity: October-November (63%)

Wind

    •   Average wind speed: 9.3 mph (15 km/h)
    •   Prevailing wind direction: West-northwest

Sunshine

    •   Average annual sunshine: 2,675 hours
    •   Sunniest month: July (290 hours)
    •   Cloudiest month: December (160 hours)

Other Climate Features

    •   Princeton Junction is located in USDA Hardiness Zone 6b, indicating a minimum winter temperature range of -5°F to 0°F (-20.6°C to -17.8°C).
    •   The growing season typically lasts from mid-April to mid-October.
    •   The area is susceptible to occasional thunderstorms, especially during the summer months.
    •   Fog is common in the early morning hours during the fall and winter.

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

    •   Princeton Junction sits on the edge of the Raritan River Valley, a rich ecosystem supporting diverse wildlife, including bald eagles and river otters.

    •   The area is home to the 1,200-acre Mercer Meadows, a nature preserve with trails, wetlands, and a bird sanctuary.

Science

    •   The nearby Princeton Plasma Physics Laboratory (PPPL) is a world-renowned research center for fusion energy.

    •   PPPL's National Spherical Torus Experiment (NSTX) is a fusion reactor that has achieved record-breaking plasma temperatures.

Personalities

    •   Albert Einstein lived and worked in Princeton Junction during the 1930s and 1940s.

    •   His home, Einstein House, is now a museum dedicated to his life and work.

    •   Other notable residents include Nobel Prize-winning physicist J. Robert Oppenheimer and mathematician John von Neumann.

Tourist Attractions
1.Princeton University

(Princeton, NJ): A prestigious Ivy League university with a beautiful campus, historic buildings, and world-renowned museums.

2.Morven Museum & Garden

(Princeton, NJ): A historic mansion that was once the home of George Washington and later served as the governor's residence. It now houses a museum with exhibits on New Jersey history and culture, as well as a beautiful garden.

3.Institute for Advanced Study

(Princeton, NJ): A research center that has been home to some of the world's most brilliant minds, including Albert Einstein and John von Neumann. Visitors can tour the campus and learn about the institute's history and research.

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