The spring temperatures that Greece sees in March, April and May bring even warmer temperatures as the year goes on. The average temperature this month is 15°C (59°F), while the average low is 11°C (52°F), and the average high increases to 19°C (66°F). The beginning of April starts off with mostly sunny days, with a small chance of rain, and an average daily temperature of 13°C (55°F). The middle of the month brings more sun, less rain, and the average daily temperature rises to 14°C (57°F). The end of April follows the same pattern, as there is even less rain, more sunny days, and a jump in the average daily temperature to 16°C (61°F). The lowest ever recorded temperature in Athens in April is 3°C (37°F), while the highest ever recorded temperature is 27°C (81°F).
Along with the warmer weather spring brings, it also brings much more sun. The average daily sunshine in April is nine hours, which is an increase of three more hours from March. Coinciding with more sun is less rain. The average amount of rainfall in April drops to 40mm, occurring over the span of just six days. With the increase in sunshine and a decrease in rain, the chance of you experiencing a rainy day during your visit to Athens is minimal.
Higher temperatures and more sun help to warm up the sea, as the average sea temperature in April climbs to 16°C (61°F). This is still fairly cool water that renders it hard to stay in for extended periods of time. However, it can be the perfect way to cool down on a hot day.
Although April brings warmer weather, the humidity does not increase with the temperature. The average humidity this month is 65%, which is a decrease of 5% comparing to that of March. This is a comfortable level that will be unnoticeable, even on hotter days.
The visit of the historical monuments and places in Ancient Olympia are in a close, walking distance to the International Olympic Academy. Since there is always a possibility of rain, it is highly recommended that the attendants of the Symposium – teachers and students – bring along proper clothing and umbrellas.