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Cornwall weather in September

Planning a journey to Cornwall this September and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What is the weather like in Cornwall in September?

Cornwall is a region in the United Kingdom. September in Cornwall generally has pleasant temperatures, with moderate precipitation. The month of September is in the summer season.

You can expect pleasant maximum daytime temperatures of around 19°C and nighttime temperatures around 13°C in Newquay.

In September, precipitation varies across different areas. From moderate rainfall in Porthscatho with an average of 60 mm to moderate rainfall in Gooseham with 90 mm. Most cities enjoy a balanced amount of sunshine, with around 165 hours of sunlight anticipated in Newquay. This ensures the days are neither too dim nor excessively sunny.

To learn more about the conditions in specific areas of Cornwall in September, check out the map below. For more details on the yearly weather, visit our Cornwall climate page.

Where to go in Cornwall in September

Find more information for the most popular destinations in the Cornwall on the map below. Click on a destination dot for more detailes.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations

What is the weather like in September for the 5 most popular destinations in Cornwall?

Newquay

In September Newquay generally has pleasant temperatures with maximum daytime temperatures around 19°C, minimum nighttime temperatures around 13°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

Newquay
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
20°C 
14°C 
202 hours 
77 mm 
15 days 
19°C 
13°C 
165 hours 
70 mm 
15 days 
October   >> October
>>  
16°C 
11°C 
118 hours 
98 mm 
18 days 
Climate in Newquay

St Austell

In September St Austell generally has pleasant temperatures with maximum daytime temperatures around 19°C, minimum nighttime temperatures around 12°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

St Austell
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
20°C 
14°C 
202 hours 
78 mm 
15 days 
19°C 
12°C 
165 hours 
69 mm 
15 days 
October   >> October
>>  
16°C 
10°C 
118 hours 
99 mm 
18 days 
Climate in St Austell

Penzance

In September Penzance generally has pleasant temperatures with maximum daytime temperatures around 18°C, minimum nighttime temperatures around 14°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

Penzance
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
19°C 
15°C 
202 hours 
74 mm 
15 days 
18°C 
14°C 
165 hours 
70 mm 
16 days 
October   >> October
>>  
16°C 
12°C 
118 hours 
104 mm 
19 days 
Climate in Penzance

Bude

In September Bude generally has pleasant temperatures with maximum daytime temperatures around 18°C, minimum nighttime temperatures around 12°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

Bude
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
20°C 
14°C 
205 hours 
91 mm 
15 days 
18°C 
12°C 
162 hours 
84 mm 
16 days 
October   >> October
>>  
15°C 
10°C 
117 hours 
116 mm 
19 days 
Climate in Bude

Falmouth

In September Falmouth generally has pleasant temperatures with maximum daytime temperatures around 19°C, minimum nighttime temperatures around 13°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

Falmouth
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
20°C 
14°C 
202 hours 
68 mm 
14 days 
19°C 
13°C 
165 hours 
61 mm 
15 days 
October   >> October
>>  
16°C 
11°C 
118 hours 
89 mm 
18 days 
Climate in Falmouth

Is your destination not in the list? Have a look at other destinations in Cornwall, in the United Kingdom.

Is September the best time to visit Cornwall?

In our opinion, September is a good time to visit Cornwall with overall pleasant weather in Newquay. It's worth noting that weather conditions might differ depending on the location you visit.

On average, the best time to visit Cornwall is in July and August with generally perfect weather in Newquay. In contrast, February, November and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Cornwall. Interested in the weather conditions in a specific month? Select the month below.

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  • Weather and climate has detailed information for every country in the world. Are you going to the United Kingdom? Get detailed historical weather averages for many cities in the United Kingdom.

    Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.