Our Proprietary 10-Day Forecast

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Current warnings over Waltham, Massachusetts
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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 Waltham, Massachusetts 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 Waltham, Massachusetts 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 Middlesex County, MA

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 Waltham, Massachusetts

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 Waltham, MA 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 Waltham, MA

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 Waltham, MA, 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 Waltham, Massachusetts

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 Middlesex County, Massachusetts

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
  • 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.
 
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Climate Summary
(made with AI, use with caution)
Waltham, Massachusetts Climate Summary

Average Temperature

    •   Annual: 49.4°F (9.7°C)
    •   January: 28.5°F (-1.9°C)
    •   July: 72.6°F (22.6°C)

Precipitation

    •   Annual: 43.8 inches (1112 mm)
    •   Snowfall: 45.1 inches (1146 mm)
    •   Number of rainy days: 120

Humidity

    •   Annual average: 70%
    •   Summer: 65%
    •   Winter: 75%

Wind

    •   Average speed: 10 mph (16 km/h)
    •   Prevailing direction: West

Sunshine

    •   Annual average: 2,300 hours
    •   Summer: 70%
    •   Winter: 40%

Climate Classification

    •   Humid continental climate (Dfa)

Key Climate Features

    •   Mild winters

Temperatures rarely drop below freezing during the day.

    •   Warm summers

Temperatures often reach into the 80s°F (27°C).

    •   Abundant precipitation

Waltham receives a moderate amount of rainfall throughout the year, with snowfall during the winter months.

    •   High humidity

The air is often humid, especially during the summer.

    •   Moderate sunshine

Waltham experiences a fair amount of sunshine, with more during the summer and less during the winter.

Climate Trends

    •   Rising temperatures

Over the past century, Waltham has experienced a gradual increase in average temperatures.

    •   More precipitation

The city has also seen an increase in annual precipitation, particularly in the form of rainfall.

    •   Earlier spring

The onset of spring has been occurring earlier in recent years.

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

    •   Waltham is home to the Beaver Brook Reservation, a 130-acre natural area with diverse flora and fauna, including beavers, owls, and salamanders.

    •   The Charles River flows through Waltham, providing habitat for a variety of aquatic species and attracting migratory birds.

Science

    •   Waltham was the birthplace of the Waltham Watch Company, a renowned watch manufacturer that revolutionized timekeeping in the 19th century.

    •   The city is home to Brandeis University, a prestigious research institution known for its contributions to science, particularly in the fields of biology, chemistry, and physics.

Personalities

    •   Charles River Laboratories, a global life sciences company, has its headquarters in Waltham.

    •   The city was the home of inventor Alexander Graham Bell, who developed the telephone while living in Waltham.

    •   Waltham was also the birthplace of the poet Henry Wadsworth Longfellow, whose works celebrated American history and nature.

Tourist Attractions
1.The Charles River Museum of Industry and Innovation

is a museum dedicated to the history of industry and innovation in the United States. The museum is located in Waltham, Massachusetts, and features exhibits on a variety of topics, including textiles, manufacturing, and transportation.

2.The Rose Kennedy Greenway

is a linear park that runs through the heart of Boston. The Greenway is a popular destination for tourists and locals alike, and features a variety of attractions, including gardens, fountains, and sculptures.

3.The Museum of Science

is a science museum located in Boston. The museum is home to a variety of exhibits on science and technology, and is a popular destination for families.

Nearby Cities:

Watertown, MA
Newton, MABelmont, MA
Weston, MAArlington, MA
Lexington, MALincoln, MA
Needham, MAWellesley, MA
Brookline, MACambridge, MA
Wayland, MASomerville, MA
Jamaica Plain, MAMedford, MA
Winchester, MACochituate, MA
South Boston, MA
Worcester, MAProvidence, RI
Springfield, MANew Haven, CT
Hartford, CTLowell, MA
Manchester, NHWaterbury, CT
Brockton, MANew Bedford, MA
Quincy, MA