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

July 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
July, like June, in Saint Peter Port, Guernsey, is another comfortable summer month, with average temperature ranging between min 13°C (55.4°F) and max 19°C (66.2°F).

Temperature

In July, the average high-temperature is essentially the same as in June - a still comfortable 19°C (66.2°F). In Saint Peter Port, the average low-temperature is 13°C (55.4°F).

Rainfall

The month with the least rainfall in Saint Peter Port is July when the rain falls for 10 days and typically collects 37mm (1.5") of precipitation.

Sea temperature

In July, the average sea temperature is 16°C (60.8°F).
Note: For swimming, a surface water temperature of 16°C (60.8°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

In July, the average length of the day in Saint Peter Port is 15.8h.

Sunshine

May through July, with an average of 8h of sunshine, are months with the most sunshine in Saint Peter Port, Guernsey.

UV index

Months with the highest UV index are June and July, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 7 in July transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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 July in Saint Peter Port?

In Saint Peter Port, in July, the average high-temperature is 19°C (66.2°F), and the average low-temperature is 13°C (55.4°F).

How many days does it rain in July in Saint Peter Port?

In Saint Peter Port, during July, the rain falls for 10 days and regularly aggregates up to 37mm (1.5") of precipitation.

What is the driest month in Saint Peter Port?

July is the month with the least rainfall in Saint Peter Port. Rain falls for 10 days and accumulates 37mm (1.5") of precipitation.

How cold is the water in July in Saint Peter Port?

In July, the average sea temperature in Saint Peter Port, Guernsey, is 16°C (60.8°F). For swimming, a surface water temperature of 16°C (60.8°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

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

In Saint Peter Port, the average length of the day in July is 15.8h.

What is the month with the most sunshine in Saint Peter Port?

Months with the most sunshine are May through July, with an average of 8h of sunshine.

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

In Saint Peter Port, the average sunshine in July is 8h.

When is the highest UV index in Saint Peter Port?

Months with the highest UV index in Saint Peter Port are June and July, with an average maximum UV index of 7.

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

The average daily maximum UV index in July in Saint Peter Port is 7. A UV Index reading of 6 to 7 represents a high hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in July - Saint Peter Port, Guernsey
  • Average high temperature in July: 19°C

The warmest month (with the highest average high temperature) is August (20°C).
The month with the lowest average high temperature is February (8°C).

  • Average low temperature in July: 13°C

The month with the highest average low temperature is August (14°C).
The coldest month (with the lowest average low temperature) is February (4°C).

Average rainfall in July - Saint Peter Port, Guernsey
  • Average rainfall in July: 37mm

The wettest month (with the highest rainfall) is December (100mm).
The driest month (with the lowest rainfall) is July (37mm).

Average rainfall days in July - Saint Peter Port, Guernsey
  • Average rainfall days in July: 10 days

The month with the highest number of rainy days is January (20 days).
The month with the lowest number of rainy days is July (10 days).

Average sea temperature in July - Saint Peter Port, Guernsey
  • Average sea temperature in July: 16°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 July / Average sunshine in July - Saint Peter Port, Guernsey
  • Average daylight in July: 15.8h

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 July: 8h

Months with most sunshine are May, June and July (Average sunshine: 8h).
Months with least sunshine are January, November and December (Average sunshine: 2).

Average UV index in July - Saint Peter Port, Guernsey
  • Average UV index in July: 7

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January, November and December (UV index 1).