Oia Temperature by Month
The average annual maximum temperature in Oia, Galicia, Spain is 18°C (64°F), with daytime highs ranging from 14°C (57°F) in February to 22°C (72°F) in August. This page covers monthly averages, day-night differences, and how Oia compares to cities worldwide.
Oia Monthly Temperatures
The weather in Oia changes moderately throughout the year, offering enough variation to appreciate each season. Nights are cooler, with lows ranging from 17°C (63°F) to 9°C (48°F).
The chart below illustrates the average maximum day and minimum night temperatures in Oia 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 297 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Oia 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.
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Oia vs World: Temperature Compared
Oia'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:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.
Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
What Does the Temperature Feel Like in Oia?
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 Oia, February is the coolest month, with average highs of 14°C (57°F) and humidity around 78% — considered 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.
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 Oia this rarely lasts long on the ground.
For more on Oia's weather — including monthly rainfall, sunshine hours, and humidity — visit our Oia climate page.
