Rossnowlagh Temperature by Month

Rossnowlagh, Donegal County, Ireland has an average annual maximum temperature of 13°C (55°F), with moderate seasonal shifts ranging from 9°C (48°F) in January to 19°C (66°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

Rossnowlagh 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 Rossnowlagh by month:

From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak.

The chart below shows the average temperature throughout the year:

Rossnowlagh'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.

Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.

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.

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 Rossnowlagh's weather, including monthly rainfall, sunshine hours, and humidity, visit our Rossnowlagh climate page.