Onís Temperature by Month
The average annual maximum temperature in Onís, Asturias, Spain is 16°C (61°F), with daytime highs ranging from 10°C (50°F) in February to 22°C (72°F) in August. This page covers monthly averages, day-night differences, and how Onís compares to cities worldwide.
Onís Monthly Temperatures
Depending on the time of the year, temperatures range from pleasant to cold in Onís. At night, minimum temperatures range from 15°C (59°F) in August to 4°C (39°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Onís 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 222 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Onís 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
pleasant
moderate
cold
very cold
Onís vs World: Temperature Compared
Onís's average annual maximum temperature is 16°C (61°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.
Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid 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.
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 Onís's weather — including monthly rainfall, sunshine hours, and humidity — visit our Onís climate page.
