With a population of around 29,200, San Sebastian sits in Retalhuleu, Guatemala. The city operates in the America/Guatemala time zone.
Recent weather here gives a sense of typical conditions: in 2025, San Sebastian recorded a mean annual temperature of 77°F, ranging from 62°F lows in April to 95°F highs in April, with about 73 inches of precipitation across the year.
View historical weather for San Sebastian · More cities in Retalhuleu