Weather in Cornwall, United Kingdom in May

So you're interested in going to Cornwall, United Kingdom in May

May is a very cold and slightly rainy time for sunbathing in Cornwall, and not recommended. May is too cold for swimming in Cornwall for any length of time, unless you have a wetsuit. Consider visiting Cornwall in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for May.

Temperature in Cornwall in May

The average maximum temperature in Cornwall in May is 14°. The average maximum temperature is 12° in the previous month and 17° in the next month.

The average temperature in Cornwall in May is 11°. The average temperature ranges is in the previous month and 14° in the next month.

The average minimum temperature in Cornwall in May is . The minimum temperature is in the previous month and 11° in the next month.

Sunshine in Cornwall in May

The average day light hours per day in Cornwall in May are 15.7 and there are 7.1 hours of sunshine per day on average during May making it a quite sunny month with some cloud cover.

The ultraviolet index in Cornwall in May is typically 6.5 during May. An ultraviolet index reading of 6 to 7 indicates a high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 20 minutes. Protection against skin and eye damage is needed. Tanning will be safest before 10am and after 4pm. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Cornwall in May

The average sea water temperature in Cornwall in May is 11.6° which is very cold and bracing, it's not recommended you swim with out a full wet suit.

Rainfall in Cornwall in May

The average total rainfall in Cornwall in May is 1.2cm and on average there are 12.8 rainy days in May making it a slightly wet time to visit the beach.

Humidity in Cornwall in May

The maximum dew point (an indicator of humidity) in Cornwall in May is 10° which is a bit dry for some. The dew point is in the previous month and 12° in the next month.

The average maximum relative humidity in Cornwall in May is typically 88.3%. The maximum relative humidity is 88.9% in the previous month and 88.6% in the next month.

The average relative humidity in Cornwall in May is typically 74.1%. The average relative humidity is 74.4% in the previous month and 74.1% in the next month.

Wind Speed in Cornwall in May

The average maximum wind speed in Cornwall in May is typically 29kmh. The average maximum wind speed is 29kmh in the previous month and 28kmh in the next month.

The average wind speed in Cornwall in May is typically 18kmh. The average wind speed is 18kmh in the previous month and 17kmh in the next month.

The average wind direction in Cornwall in May is from the West-Southwest.