Mejillones Weather in September

During September, Mejillones experiences pleasant daytime temperatures of 20°C (68°F) and cooler nights around 13°C (55°F). Rainfall is low, averaging just 5.5 mm (0.2 in) for the month.

Rainfall in Mejillones in September

Typically around 0 days of rainfall are expected, averaging 5.5 mm (0.2 in) for the month. Any rain that does arrive tends to come in a single sharp spell rather than prolonged drizzle.

Temperature in Mejillones in September

September tends to be one of the excellent months in Mejillones, with 20°C (68°F) in the afternoon and 13°C (55°F) overnight. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. At 13°C (55°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Mejillones in September

There are approximately 222 hours of sunshine this month, resulting in mostly clear days.

If you're planning additional trips, our weather planner can help you find destinations that match your weather preferences.