Douglas
Isle of Man
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Douglas, Isle of Man

Green lawns overlooking a ferry terminal in the small town of Douglas, Isle of Man
Green lawns overlooking a ferry terminal in the small town of Douglas, Isle of Man
The last month of the spring, May, is a moderate month in Douglas, Isle of Man, with temperature in the range of an average high of 13°C (55.4°F) and an average low of 6°C (42.8°F).

Temperature

In May, the average high-temperature marginally rises, from a cool 10°C (50°F) in April, to a moderate 13°C (55.4°F). In Douglas, in May, the average low-temperature is 6°C (42.8°F).

Rainfall

May is the month with the least rainfall. Rain falls for 15 days and accumulates 85mm (3.3") of precipitation.

Sea temperature

In May, the average sea temperature in Douglas is 10°C (50°F). Swimming in 10°C (50°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

The average length of the day in Douglas is 16h.

Sunshine

Months with the most sunshine in Douglas are May and June, with an average of 7h of sunshine.

UV index

The average daily maximum UV index in Douglas is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for the average person.
The average daily UV index of 5 in May transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in May in Douglas?

In Douglas, Isle of Man, in May, the average high-temperature is 13°C (55.4°F), and the average low-temperature is 6°C (42.8°F).

How many days does it rain in May in Douglas?

In May, the rain falls for 15 days. Throughout May, 85mm (3.3") of precipitation is accumulated.

What is the driest month in Douglas?

May is the month with the least rainfall in Douglas, Isle of Man. Rain falls for 15 days and accumulates 85mm (3.3") of precipitation.

What is the sea water temperature in May in Douglas?

In May, the average sea temperature in Douglas, Isle of Man, is 10°C (50°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

How many hours of daylight does Douglas have in May?

The average length of the day in May in Douglas is 16h.

What is the month with the most sunshine in Douglas?

Months with the most sunshine in Douglas are May and June, with an average of 7h of sunshine.

How long on average sun shines in May in Douglas?

The average sunshine in May in Douglas, Isle of Man, is 7h.

What is the UV index intensity in May in Douglas?

The average daily maximum UV index in May in Douglas is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV rays.
Average temperature in May - Douglas, Isle of Man
  • Average high temperature in May: 13°C

Warmest months (with the highest average high temperature) are July and August (17°C).
Months with the lowest average high temperature are January and February (6°C).

  • Average low temperature in May: 6°C

Months with the highest average low temperature are July and August (11°C).
Coldest months (with the lowest average low temperature) are January, February and March (2°C).

Average rainfall in May - Douglas, Isle of Man
  • Average rainfall in May: 85mm

The wettest month (with the highest rainfall) is October (171mm).
The driest month (with the lowest rainfall) is May (85mm).

Average rainfall days in May - Douglas, Isle of Man
  • Average rainfall days in May: 15 days

Months with the highest number of rainy days are January and November (20 days).
The month with the lowest number of rainy days is July (13 days).

Average sea temperature in May - Douglas, Isle of Man
  • Average sea temperature in May: 10°C

The best month for swimming (with the highest average sea temperature) is August (15°C).
Coldest months (with the lowest average sea temperature) are February and March (7°C).

Average daylight in May / Average sunshine in May - Douglas, Isle of Man
  • Average daylight in May: 16h

The month with the longest days is June (Average daylight: 17.1h).
The month with shortest days is December (Average daylight: 7.5h).

  • Average sunshine in May: 7h

Months with most sunshine are May and June (Average sunshine: 7h).
The month with least sunshine is December (Average sunshine: 1h).

Average UV index in May - Douglas, Isle of Man
  • Average UV index in May: 5

Months with the highest UV index are June and July (UV index 6).
Months with the lowest UV index are January and December (UV index 0).