South Wellfleet (MA) Temperature by Month
South Wellfleet, 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 27°C (81°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
South Wellfleet Monthly Temperatures
In South Wellfleet, temperatures differ significantly between summer and winter months. Nighttime lows reflect this range, dropping 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 South Wellfleet 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:
Temperature: South Wellfleet 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.
very warm
warm
pleasant
moderate
cold
very cold
South Wellfleet vs World: Temperature Compared
South Wellfleet'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.
On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.
Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
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 South Wellfleet's weather — including monthly rainfall, sunshine hours, and humidity — visit our South Wellfleet climate page.
