Alnmouth Temperature by Month

Alnmouth in Northumberland, United Kingdom sees moderate seasonal temperature shifts, with daytime highs between 8°C (46°F) in January and 18°C (64°F) in August, averaging 13°C (55°F) annually. Explore the full monthly breakdown below.

Alnmouth sees moderate fluctuations in temperatures, making each season distinct yet not extreme. Nights are considerably cooler, with lows ranging from 13°C (55°F) in August to 4°C (39°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Alnmouth by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. August, the city's warmest month, gets 169 hours of sunshine.

The chart below shows the average temperature throughout the year:

Alnmouth'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:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.

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 Alnmouth this rarely lasts long on the ground.

For more on Alnmouth's weather, including monthly rainfall, sunshine hours, and humidity, visit our Alnmouth climate page.