Portrush Temperature by Month
The average annual maximum temperature in Portrush, Antrim County, United Kingdom is 12°C (54°F), with daytime highs ranging from 9°C (48°F) in February to 17°C (63°F) in August. This page covers monthly averages, day-night differences, and how Portrush compares to cities worldwide.
Portrush Monthly Temperatures
The climate in Portrush experiences moderate temperature changes, with mild shifts between seasons. At night, temperatures range from 13°C (55°F) in August to 5°C (41°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Portrush by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. August, the warmest month of the year, receives 140 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Portrush 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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Portrush vs World: Temperature Compared
Portrush's average annual maximum temperature is 12°C (54°F). To put that in context, here's how it compares to a few well-known destinations:
Seville, Spain averages 23°C (73°F) a year — one of the warmer cities in Western Europe, with long hot summers.
Queenstown, New Zealand averages 10°C (50°F) annually — remember seasons are flipped, so its coldest months fall in June and July.
Chicago, USA averages 15°C (59°F) annually — known for extreme seasonal swings, from bitterly cold winters to warm summers.
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.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Portrush's weather — including monthly rainfall, sunshine hours, and humidity — visit our Portrush climate page.
