Londonderry Temperature by Month
Londonderry in Londonderry County, United Kingdom sees moderate seasonal temperature shifts, with daytime highs between 9°C (48°F) in January and 19°C (66°F) in July, averaging 13°C (55°F) annually. Explore the full monthly breakdown below.
Londonderry Monthly Temperatures
Londonderry experiences balanced seasonal shifts, with noticeable but moderate temperature variations. At night, minimum temperatures range from 12°C (54°F) in July to 3°C (37°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Londonderry by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. July, the warmest month, averages 141 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Londonderry vs the United Kingdom
The map below shows the annual temperature across the United Kingdom. You can also select individual months if you want to compare a specific time of year.
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Londonderry vs World: Temperature Compared
Londonderry's average annual maximum temperature is 13°C (55°F). To put that in context, here's how it compares to a few well-known destinations:
Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Londonderry this rarely lasts long on the ground.
For more on Londonderry's weather — including monthly rainfall, sunshine hours, and humidity — visit our Londonderry climate page.
