Winters in Acharnes are mild, with temperatures ranging from -6°C to 24°C on average around 10°C. Spring brings a gradual warming trend, with April being the warmest month so far, averaging 14°C. Summer is hot and dry, with July and August being the warmest months, averaging above 29°C. Autumn sees a return to milder temperatures, with October and November averaging around 17°C and 14°C respectively. Frosts are not common in winter, but occasional cold snaps do occur.