Falmouth Temperature by Month
Falmouth, 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.
Falmouth Monthly Temperatures
Falmouth sees moderate fluctuations in temperatures, making each season distinct yet not extreme. Nights are considerably cooler, with lows ranging from 14°C (57°F) in August to 6°C (43°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Falmouth 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: Falmouth 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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Falmouth vs World: Temperature Compared
Falmouth'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:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.
New York City, USA averages 17°C (63°F) a year, with hot humid summers and cold winters that bring regular snowfall.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
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.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Falmouth this rarely lasts long on the ground.
For more on Falmouth's weather — including monthly rainfall, sunshine hours, and humidity — visit our Falmouth climate page.
