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Charlestown Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Charlestown.
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Climate overview of Charlestown
The climate in Charlestown, Cornwall, United Kingdom, sees a moderate range of temperatures across the year, from 20°C (68°F) in July down to 10°C (50°F) in February.
The city receives considerable rainfall, with around 1005 mm (40 in) annually. December is the wettest month. Sunshine peaks in May, when the city sees around 7.4 hours of sunshine per day.
Charlestown Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Charlestown - and find the best time to visit.
Monthly Temperature in Charlestown
In Charlestown, seasonal changes bring about a moderate variation in temperatures. Typically, average maximum daytime temperatures range from a pleasant 20°C (68°F) in July to a chilly 10°C (50°F) in the coolest month, February.
Nights vary from 14°C (57°F) in July 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 Charlestown
Charlestown experiences significant rainfall throughout the year, averaging 1005 mm (40 in) of precipitation annually. Precipitation levels in Charlestown remain relatively steady throughout the year. December has the most rain, with 103 mm (4.1 in) over 21 days. In the driest month September, this drops slightly to 69 mm (2.7 in), making the city's climate fairly predictable. For more details, please visit our Charlestown 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 Charlestown
For those who appreciate different seasons, Charlestown 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 2.2 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Newquay, the United Kingdom (24 KM, 15 Miles).
Daily hours of sunshine
Data from: Newquay, the United Kingdom (24 KM, 15 Miles).
Best Time to Visit Charlestown
For comfortable weather, consider visiting Charlestown in July and August. Conditions are usually least favourable in January, February, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
cold
Feb
cold
Mar
mixed
Apr
mixed
May
good
Jun
very good
Jul
excellent
Aug
excellent
Sep
very good
Oct
mixed
Nov
wet
Dec
wet
- Best overall: July and August
- Warmest weather: July, August and September
- Most sunshine: May and June
Frequently asked questions about the climate in Charlestown
What is the best time to visit Charlestown?
July and August typically offer the most optimal weather in Charlestown. In contrast, January, February, November and December tend to have less optimal conditions.
What temperatures can I expect in Charlestown?
Daytime highs range from 10°C (50°F) in February to 20°C (68°F) in July. Nighttime lows range from 5°C (41°F) to 14°C (57°F).
How much rain does Charlestown get?
Annual rainfall is around 1005 mm (40 in). December is the wettest month with 103 mm (4.1 in), while September is the driest with 69 mm (2.7 in).
How sunny is Charlestown?
Charlestown 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.
Charlestown 3-Day Forecast
Charlestown on the map
Charlestown is highlighted - select any city to see its climate.
Popular in October
Where to go in October - average daytime high across popular destinations.
London
16°C (61°F) Bath15°C (59°F) Torquay16°C (61°F) Manchester14°C (57°F) York15°C (59°F) Blackpool
15°C (59°F) Edinburgh13°C (55°F) Glasgow14°C (57°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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