Agia Ermioni Temperature by Month
The average annual maximum temperature in Agia Ermioni, Chios Island, Greece is 22°C (72°F), with daytime highs ranging from 14°C (57°F) in January to 30°C (86°F) in August. This page covers monthly averages, day-night differences, and how Agia Ermioni compares to cities worldwide.
Agia Ermioni Monthly Temperatures
The climate in Agia Ermioni is dynamic, ranging widely from moderate in winter to very warm in summer. Nights are significantly colder, with lows dropping from 24°C (75°F) in August to 10°C (50°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Agia Ermioni 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:
Temperature: Agia Ermioni vs Greece
The map below shows the annual temperature across Greece. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
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Agia Ermioni vs World: Temperature Compared
Agia Ermioni's average annual maximum temperature is 22°C (72°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.
Beijing, China averages 20°C (68°F) annually, but with big seasonal swings — very cold winters and hot summers.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
What Does the Temperature Feel Like in Agia Ermioni?
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 Agia Ermioni, January is the coolest month, with average highs of 14°C (57°F) and humidity around 71% — considered high. In August, the warmest month, temperatures average 30°C (86°F) with 61% 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.
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 Agia Ermioni this rarely lasts long on the ground.
For more on Agia Ermioni's weather — including monthly rainfall, sunshine hours, and humidity — visit our Agia Ermioni climate page.
