The Mumbles Temperature by Month

The average annual maximum temperature in The Mumbles, Glamorgan, United Kingdom is 14°C (57°F), with daytime highs ranging from 9°C (48°F) in February to 20°C (68°F) in August. This page covers monthly averages, day-night differences, and how The Mumbles compares to cities worldwide.

The Mumbles experiences balanced seasonal shifts, with noticeable but moderate temperature variations. At night, minimum temperatures range from 14°C (57°F) in August to 4°C (39°F) in February.

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

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. August, the city's warmest month, gets 184 hours of sunshine.

The chart below shows the average temperature throughout the year:

The Mumbles'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:

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

Reykjavík, Iceland averages 9°C (48°F) a year, mild summers by Icelandic standards, but cold winters and frequent wind.

Beijing, China averages 20°C (68°F) annually, but with big seasonal swings, very cold winters and hot summers.

Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.

In The Mumbles, February is the coolest month, with average highs of 9°C (48°F) and humidity around 87%, considered very high. For a full picture, see our humidity page.

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 The Mumbles's weather, including monthly rainfall, sunshine hours, and humidity, visit our The Mumbles climate page.