In summer, the average temperature is 27°C in Myrtle Beach and 23°C in Hagerstown. The average rainfall in summer is 184 mm in Myrtle Beach and 96 mm in Hagerstown. In summer, it is warmer in Myrtle Beach and it rains less in Hagerstown. In winter, it is colder in Myrtle Beach and it rains more in Myrtle Beach.