When flying from Skiathos to Athens, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
The most flights from JSI to ATH are scheduled on a Monday (3 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (1 on average).
In terms of precipitation, rainfall in Athens ranges from 0.2 - 2.5 inches per month. December is typically the wettest month, when rainfall can reach 2.5 in. June is typically the driest time to visit Athens when rainfall is around 0.2 in.
If weather is an important factor for your trip to Athens, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 50.0 F).