Irún Temperature by Month
The average annual maximum temperature in Irún, Basque Country, Spain is 18°C (64°F), with daytime highs ranging from 12°C (54°F) in February to 24°C (75°F) in August. This page covers monthly averages, day-night differences, and how Irún compares to cities worldwide.
Irún Monthly Temperatures
Depending on the time of the year, temperatures range from comfortable to mild in Irún. At night, minimum temperatures range from 17°C (63°F) in August to 6°C (43°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Irún by month:
Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM. August, the city's warmest month, sees 198 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Irún vs Spain
The map below shows the annual temperature across Spain. You can also select individual months if you want to compare a specific time of year.
very warm
warm
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moderate
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Irún vs World: Temperature Compared
Irún's average annual maximum temperature is 18°C (64°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.
San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation — summers are often cool and foggy, winters mild.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
What Does the Temperature Feel Like in Irún?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.
In Irún, February is the coolest month, with average highs of 13°C (55°F) and humidity around 72% — considered high. In August, the warmest month, temperatures average 24°C (75°F) with 75% humidity — conditions that feel high. For a full picture, see our humidity page.
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 Irún's weather — including monthly rainfall, sunshine hours, and humidity — visit our Irún climate page.
