Our Proprietary 10-Day Forecast

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Current warnings over Groton, 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 Groton, 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 Groton, 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 Groton, 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 Groton, 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 Groton, 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 Groton, 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 Groton, 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
  • 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)
Groton, MA Climate Summary

Location

Middlesex County, Massachusetts, USA

Climate Zone

Humid Continental (Dfb)

Average Temperature

    •   Annual

48.1°F (9.0°C)

    •   Summer (June-August)

70.6°F (21.4°C)

    •   Winter (December-February)

26.8°F (-2.9°C)

Average Precipitation

    •   Annual

44.8 inches (1138 mm)

    •   Wettest Month (November)

4.5 inches (114 mm)

    •   Driest Month (February)

2.8 inches (71 mm)

Snowfall

    •   Average Annual Snowfall

46.1 inches (117 cm)

    •   Heaviest Snowfall Month (February)

11.3 inches (28.7 cm)

Sunshine

    •   Average Annual Sunshine

2,550 hours

Wind

    •   Prevailing Wind Direction

West-northwest

    •   Average Wind Speed

8.9 mph (14.3 km/h)

Other Climate Features

    •   Growing Season

170-180 days

    •   Hardiness Zone

5b

    •   Humid Summers

Temperatures can reach into the 90s°F (30s°C) with high humidity.

    •   Cold Winters

Temperatures can drop below 0°F (-18°C) with occasional snowstorms.

    •   Frequent Precipitation

Groton experiences precipitation throughout the year, including rain, snow, and thunderstorms.

    •   Mild Spring and Fall

Temperatures are generally pleasant in spring and fall, with occasional warm or cool spells.

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

    •   Groton is home to the Nashua River, a designated National Wild and Scenic River.

    •   The town is part of the Great Meadows National Wildlife Refuge, a sanctuary for migratory birds and other wildlife.

    •   The Groton Natural History Society, founded in 1922, has preserved over 500 acres of open space for conservation.

Science

    •   Groton School, a prestigious boarding school, has a long history of science education.

    •   The school's founder, Endicott Peabody, was a naturalist and conservationist.

    •   Groton was the birthplace of physicist and Nobel laureate Robert Hofstadter.

Personalities

    •   Samuel Prescott, a \

Tourist Attractions
1.Fruitlands Museum

is a museum and historic site located in Harvard, Massachusetts. The museum is dedicated to the preservation and interpretation of the history of the American Transcendentalist movement. The museum's collection includes works by Ralph Waldo Emerson, Henry David Thoreau, and Margaret Fuller.

2.Nashoba Valley Winery

is a winery located in Bolton, Massachusetts. The winery produces a variety of wines, including red, white, and sparkling wines. The winery also offers tours and tastings.

3.Wachusett Mountain State Reservation

is a state park located in Princeton, Massachusetts. The park offers a variety of activities, including hiking, biking, and fishing. The park also has a summit house with panoramic views of the surrounding area.

Nearby Cities:

Ayer, MA
East Pepperell, MAPepperell, MA
Devens, MAShirley, MA
Dunstable, MALittleton Common, MA
Westford, MAHarvard, MA
Townsend, MALunenburg, MA
Boxborough, MATyngsboro, MA
Hollis, NHBrookline, NH
Chelmsford, MAActon, MA
Boston, MA
South Boston, MAWorcester, MA
Providence, RISpringfield, MA
New Haven, CTHartford, CT
Lowell, MACambridge, MA
Manchester, NHWaterbury, CT
Albany, NY