Hyannis (MA) Temperature by Month
Hyannis, 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.
Hyannis Monthly Temperatures
The climate in Hyannis is dynamic, ranging widely from chilly in winter to comfortable in summer. Nights are significantly colder, with lows dropping from 19°C (66°F) in July to -5°C (23°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Hyannis by month:
Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM. July, the warmest month, sees 301 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Hyannis 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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Hyannis vs World: Temperature Compared
Hyannis'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:
Seville, Spain averages 23°C (73°F) a year — one of the warmer cities in Western Europe, with long hot summers.
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.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
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.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Hyannis's weather — including monthly rainfall, sunshine hours, and humidity — visit our Hyannis climate page.
