Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average sea temperature in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
May
Weather in May
Temperature
The advent of May presents an average high-temperature of a refreshing 13°C (55.4°F), maintaining a close correlation with the preceding month. Nighttime temperature in Porthleven reflects an average dip to a fresh 10.8°C (51.4°F) in May, subtly cooler than its daytime highs.Humidity
The average relative humidity in May is 83%.Rainfall
May is the month with the least rainfall. Rain falls for 13.6 days and accumulates 29mm (1.14") of precipitation.Snowfall
In Porthleven, snow does not fall in March through December.Sea temperature
In Porthleven, the average seawater temperature in May is 12°C (53.6°F).Note: Without suitable protection, venturing into 12°C (53.6°F) waters cooler than 10°C (50°F) can lead to pronounced cold shock and rapid breaths.
Daylight
In May, the average length of the day in Porthleven is 15h and 27min.On the first day of May in Porthleven, sunrise is at 5:56 am and sunset at 8:40 pm. On the last day of the month, sunrise is at 5:16 am and sunset at 9:21 pm BST.
Sunshine
The average sunshine in May is 8.4h.UV index
In Porthleven, United Kingdom, the average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: A typical high UV index of 4 in May suggests the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Porthleven?
What is the average humidity in May in Porthleven?
What is the driest month in Porthleven?
How many days does it rain in May in Porthleven?
When it does not snow in Porthleven?
What is the water temperature in May in Porthleven?
How many hours of daylight does Porthleven have in May?
When is the sunrise / sunset in May in Porthleven?
How long on average sun shines in May in Porthleven?
How high is the UV index in May in Porthleven?
Average temperature in May
Porthleven, United Kingdom
- Average high temperature in May: 13°C
The warmest month (with the highest average high temperature) is August (17.4°C).
The month with the lowest average high temperature is February (9.3°C).
- Average low temperature in May: 10.8°C
The month with the highest average low temperature is August (15.8°C).
The coldest month (with the lowest average low temperature) is February (7.1°C).
Average pressure in May
Porthleven, United Kingdom
- Average pressure in May: 1017.3mbar
The month with the highest atmospheric pressure is September (1017.5mbar).
The month with the lowest atmospheric pressure is November (1010.5mbar).
Average wind speed in May
Porthleven, United Kingdom
- Average wind speed in May: 21.6km/h
The windiest month (with the highest average wind speed) is December (32.9km/h).
The calmest month (with the lowest average wind speed) is July (20.8km/h).
Average humidity in May
Porthleven, United Kingdom
- Average humidity in May: 83%
The months with the highest relative humidity are June and July (84%).
The months with the lowest relative humidity are February, November and December (79%).
Average rainfall in May
Porthleven, United Kingdom
- Average rainfall in May: 29mm
The wettest month (with the highest rainfall) is November (91mm).
The driest month (with the least rainfall) is May (29mm).
Average rainfall days in May
Porthleven, United Kingdom
- Average rainfall days in May: 13.6 days
The month with the highest number of rainy days is December (21.7 days).
The month with the least rainy days is May (13.6 days).
Average snowfall in May
Porthleven, United Kingdom
- Average snowfall in May: 0mm
The month with the highest snowfall is February (3mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in May
Porthleven, United Kingdom
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in May
Porthleven, United Kingdom
- Average sea temperature in May: 12°C
The best month for swimming (with the highest average sea temperature) is August (17.1°C).
The coldest month (with the lowest average sea temperature) is March (9.7°C).
Average daylight in May /
Average sunshine in May
Porthleven, United Kingdom
- Average daylight in May: 15h and 2min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in May: 8h and 2min
The months with the most sunshine are April and July (Average sunshine: 8h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days in May
Porthleven, United Kingdom
- Average sunshine days in May: 14.8 days
The month with the most sunshine days is May (14.8 days).
The month with the least sunshine days is November (5.3 days).
Average UV index in May
Porthleven, United Kingdom
- Average UV index in May: 4
The month with the highest UV index is August (UV index 5).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in May
Porthleven, United Kingdom
- Average cloud cover in May: 45
The month with the most cloud cover is December (Cloud cover 62).
The month with the least cloud cover is April (Cloud cover 43).
Average visibility in May
Porthleven, United Kingdom
- Average visibility in May: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
