Bourne (MA) Temperature by Month

The average annual maximum temperature in Bourne, Massachusetts, United States of America is 15°C (59°F), with daytime highs ranging from 4°C (39°F) in January to 27°C (81°F) in July. This page covers monthly averages, day-night differences, and how Bourne compares to cities worldwide.

Depending on the time of the year, temperatures range from warm to cold in Bourne. Nighttime lows follow the same pattern, ranging from 19°C (66°F) to -6°C (21°F).

The chart below illustrates the average maximum day and minimum night temperatures in Bourne by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. July, the city's warmest month, gets 301 hours of sunshine.

The chart below shows the average temperature throughout the year:

Bourne's average annual maximum temperature is 15°C (59°F). To put that in context, here's how it compares to a few well-known destinations:

Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.

Glasgow, Scotland averages 13°C (55°F) a year, mild but often grey, with cold winters and rarely hot summers.

Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters, and seasons reversed compared to Europe.

Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Bourne this rarely lasts long on the ground.

For more on Bourne's weather, including monthly rainfall, sunshine hours, and humidity, visit our Bourne climate page.