Chatham (MA) Temperature by Month
The average annual maximum temperature in Chatham, Massachusetts, United States of America is 14°C (57°F), with daytime highs ranging from 3°C (37°F) in February to 25°C (77°F) in July. This page covers monthly averages, day-night differences, and how Chatham compares to cities worldwide.
Chatham Monthly Temperatures
The climate in Chatham is known for significant temperature differences throughout the year. At night, this contrast is just as clear, with lows ranging from 18°C (64°F) in July to -4°C (25°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Chatham 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:
Temperature: Chatham vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
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Chatham vs World: Temperature Compared
Chatham's average annual maximum temperature is 14°C (57°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.
Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.
Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
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 Chatham's weather — including monthly rainfall, sunshine hours, and humidity — visit our Chatham climate page.
