Portmellon Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Portmellon.
Climate overview of Portmellon
The climate in Portmellon, Cornwall, United Kingdom, sees a moderate range of temperatures across the year, from 20°C (68°F) in August down to 10°C (50°F) in February.
Portmellon sees a moderate amount of rainfall, totalling around 965 mm (38 in) per year. It experiences pleasant summers and cold winters, creating some seasonal variation. May is the sunniest month, averaging 7.4 hours of sunshine per day.
Portmellon Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Portmellon - and find the best time to visit.
Monthly Temperature in Portmellon
In Portmellon, seasonal changes bring about a moderate variation in temperatures. Average maximum daytime temperatures range from a pleasant 20°C (68°F) in August, the warmest time of the year, to a chilly 10°C (50°F) during cooler months like February.
At night, you can expect temperatures ranging from 14°C (57°F) in August to around 5°C (41°F) during February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Portmellon
On average, Portmellon receives a reasonable amount of rainfall, with an annual precipitation of 965 mm (38 in). Year-round, Portmellon has a balanced climate with minimal variation in precipitation. The difference between the wettest month, December, with 98 mm (3.9 in), and the driest month, September, with 66 mm (2.6 in), is minimal. For more details, please visit our Portmellon Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Portmellon
Seasonal changes in sunshine hours are quite dramatic in Portmellon. While May receives considerable daily sunshine with up to 7.4 hours, December marks the darkest time of the year, where sunshine is scarce with only 2.2 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Portmellon
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: July and August
- Warmest weather: July and August
- Most sunshine: May and June
- Seasonal pattern: Pleasant summers and cold winters
Frequently asked questions about the climate in Portmellon
What is the best time to visit Portmellon?
July and August typically offer the most optimal weather in Portmellon. In contrast, February tends to have less optimal conditions. Portmellon has pleasant summers and cold winters.
What temperatures can I expect in Portmellon?
Daytime highs range from 10°C (50°F) in February to 20°C (68°F) in August. Nighttime lows range from 5°C (41°F) to 14°C (57°F).
How much rain does Portmellon get?
Annual rainfall is around 965 mm (38 in). December is the wettest month with 98 mm (3.9 in), while September is the driest with 66 mm (2.6 in).
How sunny is Portmellon?
Portmellon receives around 1,753 hours of sunshine per year. May is the sunniest month with 222 hours, while December is the cloudiest with just 65 hours.
Portmellon 3-Day Forecast
Portmellon on the map
Portmellon is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
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