Saint Peter Port
Guernsey
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Saint Peter Port, Guernsey

A calm sunny day in Saint Peter Port, Guernsey, with ships docked at the harbor, and a clear skyline in the horizon
A calm sunny day in Saint Peter Port, Guernsey, with ships docked at the harbor, and a clear skyline in the horizon
The last month of the spring, May, is also a fresh month in Saint Peter Port, Guernsey, with average temperature fluctuating between 10.6°C (51.1°F) and 12.8°C (55°F).

Temperature

In May, the average high-temperature is almost the same as in April - a still cool 12.8°C (55°F). In Saint Peter Port, the average low-temperature is 10.6°C (51.1°F).

Humidity

The average relative humidity in May is 82%.

Rainfall

In Saint Peter Port, in May, during 11.8 rainfall days, 27mm (1.06") of precipitation is typically accumulated. Throughout the year, in Saint Peter Port, there are 196.3 rainfall days, and 557mm (21.93") of precipitation is accumulated.

Snowfall

February through December are months without snowfall in Saint Peter Port.

Sea temperature

In Saint Peter Port, the average seawater temperature is 11°C (51.8°F).
Note: 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.

Daylight

In Saint Peter Port, the average length of the day is 15.4h.

Sunshine

In Saint Peter Port, Guernsey, the average sunshine is 9.1h.

UV index

In Saint Peter Port, Guernsey, the average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.

What is the temperature in May in Saint Peter Port?

In May, in Saint Peter Port, the average high-temperature is 12.8°C (55°F), and the average low-temperature is 10.6°C (51.1°F).

What is the average humidity in May in Saint Peter Port?

The average relative humidity in May in Saint Peter Port is 82%.

How much does it rain in Saint Peter Port in May?

In Saint Peter Port, during May, the rain falls for 11.8 days and regularly aggregates up to 27mm (1.06") of precipitation.

When it does not snow in Saint Peter Port?

February through December are months without snowfall in Saint Peter Port, Guernsey.

What is the sea water temperature in May in Saint Peter Port?

In May, the average sea temperature is 11°C (51.8°F). Swimming in 11°C (51.8°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in May in Saint Peter Port?

The average length of the day in May is 15.4h.

How long on average sun shines in May in Saint Peter Port?

In May, the average sunshine is 9.1h.

What is the UV index intensity in May in Saint Peter Port?

The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV radiation.
Average temperature in May - Saint Peter Port, Guernsey
  • Average high temperature in May: 12.8°C

The warmest month (with the highest average high temperature) is August (17.8°C).
The month with the lowest average high temperature is February (9.2°C).

  • Average low temperature in May: 10.6°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°C).

Average humidity in May - Saint Peter Port, Guernsey
  • Average humidity in May: 82%

Months with the highest relative humidity are June and July (84%).
Months with the lowest relative humidity are November and December (77%).

Average rainfall in May - Saint Peter Port, Guernsey
  • Average rainfall in May: 27mm

The wettest month (with the highest rainfall) is November (87mm).
The driest month (with the lowest rainfall) is July (26mm).

Average rainfall days in May - Saint Peter Port, Guernsey
  • Average rainfall days in May: 11.8 days

The month with the highest number of rainy days is November (22.8 days).
The month with the lowest number of rainy days is June (11.5 days).

Average snowfall in May - Saint Peter Port, Guernsey
  • Average snowfall in May: 0mm

The month with the highest snowfall is January (2mm).
Months with the lowest snowfall are February, March, April, May, June, July, August, September, October, November and December (0mm).

Average snowfall days in May - Saint Peter Port, Guernsey
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (0.3 days).
Months with the lowest number of snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

Average sea temperature in May - Saint Peter Port, Guernsey
  • Average sea temperature in May: 11°C

The best month for swimming (with the highest average sea temperature) is August (17°C).
Coldest months (with the lowest average sea temperature) are February and March (9°C).

Average daylight in May / Average sunshine in May - Saint Peter Port, Guernsey
  • Average daylight in May: 15.4h

The month with the longest days is June (Average daylight: 16.2h).
The month with shortest days is December (Average daylight: 8.3h).

  • Average sunshine in May: 9.1h

The month with most sunshine is July (Average sunshine: 9.7h).
Months with least sunshine are January, November and December (Average sunshine: 3.9).

Average UV index in May - Saint Peter Port, Guernsey
  • Average UV index in May: 4

Months with the highest UV index are July, August and September (UV index 5).
The month with the lowest UV index is February (UV index 2).