Chalkida's winters are mild, with temperatures ranging from -6C in February to around 0C in April, before warming up significantly. Spring is a pleasant time, with temperatures gradually increasing from 20C in March to 28C by April. Summer months bring hot and dry conditions, with July and August averaging highs above 40C. Autumn is warm but slightly cooler than summer, with September's average temperature dropping to around 23C. Winters are generally mild, with December's temperatures ranging from -3C to 19C.