Portesham Temperature by Month

Portesham in Dorset, United Kingdom sees significant seasonal temperature differences, with daytime highs between 10°C (50°F) in February and 21°C (70°F) in July, averaging 15°C (59°F) annually. Explore the full monthly breakdown below.

The climate in Portesham is dynamic, ranging widely from chilly in winter to pleasant in summer. Nights are significantly colder, with lows dropping from 14°C (57°F) in July to 4°C (39°F) in February.

The chart below illustrates the average maximum day and minimum night temperatures in Portesham 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 192 hours of sunshine.

The chart below shows the average temperature throughout the year:

Portesham'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.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

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

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

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