Monthly weather forecast and climate
Londonderry, United Kingdom

What are the coldest months in Londonderry?

The coldest months are January and December, with an average high-temperature of 8°C (46.4°F).

How much does it rain in Londonderry?

In Londonderry, United Kingdom, during the entire year, the rain falls for 170 days and collects up to 852.7mm (33.6") of precipitation.

What is the month with the coldest sea water in Londonderry?

March is the month with the coldest seawater in Londonderry, United Kingdom, with an average sea temperature of 8.7°C (47.7°F). Swimming in 8.7°C (47.7°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

What is the driest month in Londonderry?

The month with the least rainfall is May when the rain falls for 12 days and typically collects 51.2mm (2") of precipitation.

What is the warmest month in Londonderry?

The warmest month is July, with an average high-temperature of 18.9°C (66°F) and an average low-temperature of 11.6°C (52.9°F).

When is the sea warmest in Londonderry?

August is the month with the warmest seawater, with an average sea temperature of 14.7°C (58.5°F). Swimming in 14.7°C (58.5°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

What is the rainiest month in Londonderry?

October is the month with the most rainfall in Londonderry. Rain falls for 16 days and accumulates 89mm (3.5") of precipitation.
Average temperature - Londonderry, United Kingdom
Average rainfall - Londonderry, United Kingdom

The wettest month (with the highest rainfall) is October (89mm).
The driest month (with the lowest rainfall) is May (51.2mm).

Average rainfall days - Londonderry, United Kingdom
Average sea temperature - Londonderry, United Kingdom

The best month for swimming (with the highest average sea temperature) is August (14.7°C).
The coldest month (with the lowest average sea temperature) is March (8.7°C).

Average daylight / Average sunshine - Londonderry, United Kingdom
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