Climate Insights for Athens

The climate in Athens is warm and mild. The average annual temperature is 20°C and approximately 1209mm of precipitation falls per year. Athens receives a notable amount of rainfall throughout the year, including during its driest month. Athens is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are January, February, December, when temperatures can drop to 4°C.

Temperatures in Athens vary considerably across the year, with a 31°C difference between the coldest and warmest months. August is the hottest month, with daytime highs reaching 35°C and an average of 30°C. January is the coolest month, with minimum temperatures around 4°C and an average of 9°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 6°C shift in average temperatures.

Athens is a fairly wet location, receiving approximately 1209mm of precipitation annually, which averages out to around 101mm per month. The wettest month is April, averaging 157mm of rainfall. May and March also tend to see above-average precipitation. The driest month is September, with just 56mm. That's 101mm less than April, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Athens is relatively calm, with an average annual wind speed of 12km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 13km/h in winter, 13km/h in spring, 10km/h in summer, 11km/h in autumn.

It is currently summer in Athens, which began on June 21, 2026. Athens is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 35°C, while the coldest stretch bottoms out in January near 4°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

The best time to visit Athens is during October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 94mm per month. By contrast, August can be uncomfortably hot with highs reaching 35°C, while January is the coldest period with lows dropping to 4°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Athens based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.