Conwy Temperature by Month

Conwy in Gwynedd, United Kingdom sees significant seasonal temperature differences, with daytime highs between 9°C (48°F) in January and 20°C (68°F) in July, averaging 14°C (57°F) annually. Explore the full monthly breakdown below.

In Conwy, temperatures differ significantly between summer and winter months. Nighttime lows reflect this range, dropping from 13°C (55°F) in July to 3°C (37°F) in January.

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

The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. July, the city's warmest month, averages 155 hours of sunshine.

The chart below shows the average temperature throughout the year:

Conwy's average annual maximum temperature is 14°C (57°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.

Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters, and seasons reversed compared to Europe.

Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.

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 Conwy this rarely lasts long on the ground.

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