Plymouth Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Plymouth.
Climate overview of Plymouth
Temperatures in Plymouth, Cornwall, United Kingdom, shift moderately through the seasons. The warmest month is August at 20°C (68°F), and the coolest is February at 10°C (50°F).
The city receives considerable rainfall, with around 1013 mm (40 in) annually. December is the wettest month. May is the sunniest month, averaging 7.4 hours of sunshine per day.
Plymouth Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Plymouth - and find the best time to visit.
Monthly Temperature in Plymouth
The climate in Plymouth experiences moderate temperature changes, with mild shifts between seasons. Typically, average maximum daytime temperatures range from a pleasant 20°C (68°F) in August to a chilly 10°C (50°F) in the coolest month, February.
Nights vary from 14°C (57°F) in August to around 5°C (41°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Plymouth
Plymouth has a notably wet climate with abundant precipitation, recording 1013 mm (40 in) of rainfall per year. Precipitation levels in Plymouth remain relatively steady throughout the year. December has the most rain, with 107 mm (4.2 in) over 20 days. In the driest month September, this drops slightly to 68 mm (2.7 in), making the city's climate fairly predictable. For more details, please visit our Plymouth 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 Plymouth
For those who appreciate different seasons, Plymouth serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 7.4 hours of sunshine daily, and embrace the darker days in December, offering only 1.8 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Plymouth by Month
The city experiences its highest humidity in January, reaching 86%. In May, the humidity drops to its lowest level at 79%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Plymouth
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, June and July
- Fewest rainy days: April, June, July and August
Frequently asked questions about the climate in Plymouth
What is the best time to visit Plymouth?
July and August typically offer the most optimal weather in Plymouth. In contrast, January, February, November and December tend to have less optimal conditions.
What temperatures can I expect in Plymouth?
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 Plymouth get?
Annual rainfall is around 1013 mm (40 in). December is the wettest month with 107 mm (4.2 in), while September is the driest with 68 mm (2.7 in).
How sunny is Plymouth?
Plymouth receives around 1,729 hours of sunshine per year. May is the sunniest month with 222 hours, while December is the cloudiest with just 55 hours.
Plymouth 3-Day Forecast
Plymouth on the map
Plymouth is highlighted - select any city to see its climate.
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