Temperature in Cornwall in September

Daytime highs, nighttime lows and the warmest cities in Cornwall, the United Kingdom this September.

Cornwall, the United Kingdom, a region in the United Kingdom, typically experiences pleasant weather in September, with maximum daytime temperatures around 19°C (66°F) and nighttime temperatures around 13°C (55°F) in Newquay. September is part of the summer season

What is the temperature of the different cities in Cornwall, the United Kingdom in September?

Find the average daytime temperatures in September for the most popular destinations in Cornwall on the map below. Click on a destination dot for more detailed information.

Select a Month

Check the conditions for any month of the year.

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For a detailed overview over the year and the best time to visit Cornwall, check out our Cornwall's climate page.

See also: Cornwall weather by month.

Best Places to Visit in Cornwall in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Cornwall.

Conditions Temperatures Precipitation
Avg daytime high -5°C (23°F) cold → 32°C (90°F) hot

Marker color shows the average daytime high temperature in September: blue is cold, red is hot.

See all September weather averages, cities and regions in Cornwall

Cornwall temperatures in September: frequently asked questions

How hot does it get in Cornwall, the United Kingdom in September?

Newquay averages a daytime high of 19°C (66°F) in September, which is pleasant for Cornwall, the United Kingdom.

How cold does it get at night in Cornwall, the United Kingdom in September?

Nighttime temperatures in Newquay typically drop to around 13°C (55°F) in September.

How much sun does Cornwall, the United Kingdom get in September?

Newquay usually sees around 165 hours of sunlight, indicating a moderately sunny period.

Interested in more climate information?

We have much more information about the climate in Cornwall.

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 travel conditions. Find out where to go with our weather planner.

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