Dennis Port (MA) Temperature by Month

Dennis Port, Massachusetts, United States of America has an average annual maximum temperature of 15°C (59°F), ranging from 4°C (39°F) in February to 26°C (79°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

The weather in Dennis Port experiences significant differences between warm and cold seasons, with big shifts in temperature. At night, minimum temperatures range from 19°C (66°F) in July to -4°C (25°F) in February.

The chart below illustrates the average maximum day and minimum night temperatures in Dennis Port 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:

Dennis Port'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:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Queenstown, New Zealand averages 10°C (50°F) annually, remember seasons are flipped, so its coldest months fall in June and July.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

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.

Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.

Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.

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