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 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
Weather in May
Temperature
A minimal variation is noted in Isles of Scilly's average high-temperature at the onset of May, reaching a still fresh 12.3°C (54.1°F) from April's 10.8°C (51.4°F). Isles of Scilly's nighttime temperature in May shows a minor descent, with a steady average of 10.8°C (51.4°F).Humidity
In May, the average relative humidity is 84%.Rainfall
The month with the least rainfall is May, when the rain falls for 13.7 days and typically collects 29mm (1.14") of precipitation.Snowfall
In Isles of Scilly, snow does not fall in January, February, April through September, November and December.Sea temperature
In Isles of Scilly, the average seawater temperature in May is 12.2°C (54°F).Note: Diving into 12.2°C (54°F) when it's under 10°C (50°F) can cause immediate cold shock symptoms, marked by hyperventilation.
Daylight
In Isles of Scilly, the average length of the day in May is 15h and 26min.On the first day of the month, sunrise is at 6:00 am and sunset at 8:44 pm. On the last day of May, sunrise is at 5:21 am and sunset at 9:24 pm BST.
Sunshine
The month with the most sunshine is May, with an average of 8.5h of sunshine.UV index
The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high UV index of 4 in May translates into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the average humidity in May?
What is the driest month?
How much does it rain in May?
When it does not snow?
What is the sea water temperature in May?
What is the average length of the day in May?
When is the sunrise / sunset in May in Isles of Scilly?
What month has the most sunshine?
How many hours of sunshine does Isles of Scilly have in May?
How high is the UV index in May?
Average temperature in May
Isles of Scilly, United Kingdom
- Average high temperature in May: 12.3°C
The warmest month (with the highest average high temperature) is August (17.2°C).
The month with the lowest average high temperature is February (9.7°C).
- Average low temperature in May: 10.8°C
The month with the highest average low temperature is August (15.9°C).
The coldest month (with the lowest average low temperature) is February (7.9°C).
Average pressure in May
Isles of Scilly, United Kingdom
- Average pressure in May: 1017.3mbar
The month with the highest atmospheric pressure is September (1017.6mbar).
The month with the lowest atmospheric pressure is November (1010.6mbar).
Average wind speed in May
Isles of Scilly, United Kingdom
- Average wind speed in May: 24.4km/h
The windiest month (with the highest average wind speed) is December (35.9km/h).
The calmest month (with the lowest average wind speed) is July (23.8km/h).
Average humidity in May
Isles of Scilly, United Kingdom
- Average humidity in May: 84%
The month with the highest relative humidity is June (85%).
The months with the lowest relative humidity are January, February, November and December (78%).
Average rainfall in May
Isles of Scilly, United Kingdom
- Average rainfall in May: 29mm
The wettest month (with the highest rainfall) is November (86mm).
The driest month (with the least rainfall) is May (29mm).
Average rainfall days in May
Isles of Scilly, United Kingdom
- Average rainfall days in May: 13.7 days
The month with the highest number of rainy days is November (21.3 days).
The month with the least rainy days is June (13.1 days).
Average snowfall days in May
Isles of Scilly, United Kingdom
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is March (0.2 days).
The months with the least snowfall days are January, February, April, May, June, July, August, September, November and December (0 days).
Average sea temperature in May
Isles of Scilly, United Kingdom
- Average sea temperature in May: 12.2°C
The best month for swimming (with the highest average sea temperature) is August (17.3°C).
The coldest month (with the lowest average sea temperature) is March (10.1°C).
Average daylight in May /
Average sunshine in May
Isles of Scilly, 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 3min
The month with the most sunshine is May (Average sunshine: 8h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days in May
Isles of Scilly, United Kingdom
- Average sunshine days in May: 14.5 days
The month with the most sunshine days is June (15 days).
The month with the least sunshine days is November (5.7 days).
Average UV index in May
Isles of Scilly, United Kingdom
- Average UV index in May: 4
The month with the highest UV index is August (UV index 5).
The months with the lowest UV index are January, February, March, April, November and December (UV index 3).
Average cloud cover in May
Isles of Scilly, United Kingdom
- Average cloud cover in May: 45
The months with the most cloud cover are January and December (Cloud cover 62).
The month with the least cloud cover is April (Cloud cover 44).
Average visibility in May
Isles of Scilly, 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).
Isles of Scilly, United Kingdom
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