Normal weather for Cornwall in May
It's cool to moderate in May in Cornwall with an average temperature of 15°C. Temperatures this month range from a low of 12°C to a high of 17°C. At night, you can expect temperatures between 7°C and 12°C.
In May, there is an average of 70 mm of precipitation, spread over 10 days. The wind speed is around 4 Bft, mostly coming from the South.
Cornwall in May |
London | ||
|---|---|---|---|
 Average Temperature |
15°C | 18°C | |
 High Temp |
17°C | 21°C | |
| Low Temp |
12°C | 15°C | |
 Total Precipitation |
70 mm | 46 mm | |
| Rainy Days |
10 days | 8 days | |
Start of May
The month of May starts in Cornwall with cool temperatures, averaging around 14°C during the day and nights close to 9°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Since temperatures can differ between day and night, it’s a good idea to dress in layers. During the day, go for a light coat, jumper or cardigan, and long trousers. In the evening and morning, we recommend a warm coat, jumper or cardigan, and long trousers.
Mid-May
By mid-May, the average daytime temperature rises to around 15°C, with nights close to 10°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
Temperatures vary between day and night, so it’s smart to wear layers. During the day, go for a light coat, jumper or cardigan, and long trousers. In the evening and morning, we recommend a warm coat, jumper or cardigan, and long trousers.
End of May
By the end of May, the average daytime temperature in Cornwall will be around 16°C, with nights close to 11°C. A shower might show up, but overall the weather will be dry and sunny.
As it gets cooler in the evening, it’s best to wear layers. During the day, go for a light coat, jumper or cardigan, and long trousers. In the evening and morning, we recommend a warm coat, jumper or cardigan, and long trousers.
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UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is May a good time to visit Cornwall?
Looking for sun and warm weather? Then May isn’t the best time to be in Cornwall. The temperature is too low this month for a warm stay.
Temperature records for Cornwall in May
With 24°C, Cornwall hit the highest temperature in the last 10 years in May 2020. The lowest daytime temperature in this month was 9°C in 2015. The extreme night temperatures ranged from a low of 2°C to a high of 15°C.
Check out the climate of Cornwall for all months and discover the best travel time
Curious about the climate in other parts of England? Check out the weather and climate in places like London, Edinburgh, Devon, or have a look at other destinations in England.
April
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Daily Temperature in May in Cornwall
This chart shows the average daily temperatures, both day and night, for each day in May in Cornwall, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in May in Cornwall
The chart below shows the average daily precipitation in May for Cornwall, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for May, you can expect around 10 days of rain in Cornwall.
Daily UV Index in May in Cornwall
This chart shows the average daily UV index in May in Cornwall, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in Cornwall Over the Years
This chart shows the average temperature in May in Cornwall, measured in degrees Celsius, over the past years.
Total Precipitation in May in Cornwall Over the Years
This chart shows the average precipitation in May in Cornwall, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in May for Cornwall
Click on a specific day in May for detailed info on the typical weather on that day in Cornwall. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Cornwall
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Average Weather in Cornwall by Month
Click on a month below to see detailed weather info for Cornwall. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
