Porthleven Temperature by Month
Porthleven, Cornwall, United Kingdom has an average annual maximum temperature of 15°C (59°F), with moderate seasonal shifts ranging from 11°C (52°F) in February to 20°C (68°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Porthleven Monthly Temperatures
The climate in Porthleven experiences moderate temperature changes, with mild shifts between seasons. At night, temperatures range from 15°C (59°F) in August to 6°C (43°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Porthleven by month:
Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM. August, the warmest month, sees 202 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Porthleven vs the United Kingdom
The map below shows the annual temperature across the United Kingdom. You can also select individual months if you want to compare a specific time of year.
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Porthleven vs World: Temperature Compared
Porthleven'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.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.
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.
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 Porthleven's weather — including monthly rainfall, sunshine hours, and humidity — visit our Porthleven climate page.
