Harwich Port (MA) Temperature by Month

Harwich Port in Massachusetts, United States of America sees significant seasonal temperature differences, with daytime highs between 4°C (39°F) in February and 26°C (79°F) in July, averaging 14°C (57°F) annually. Explore the full monthly breakdown below.

Depending on the time of the year, temperatures range from warm to cold in Harwich Port. Nighttime lows follow the same pattern, ranging from 19°C (66°F) to -4°C (25°F).

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

The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. July, the city's warmest month, averages 301 hours of sunshine.

The chart below shows the average temperature throughout the year:

Harwich Port'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.

New York City, USA averages 17°C (63°F) a year, with hot humid summers and cold winters that bring regular snowfall.

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.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

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