St. Lucia Guide - September Weather

With temperatures reaching their peak during September, vacationers will delight in the warm sand and sun on uncrowded beaches of the off-season. Traditionally the wettest month of the year, September in recent years is beginning to shift towards drier conditions. Whether wet or dry, vacationers should not be concerned as the sun is never very far away in St. Lucia.

Typical Weather in September

Temperatures in St. Lucia during September generally vary between an average high during the day of 86.0 degrees and an average low at night of 80.0 degrees

Temperature

During the early morning hours of an average September day in St. Lucia, you can expect the temperature will be in the vicinity of 81.8 degrees. In September, temperatures typically rise to around 85.2 degrees by early afternoon. By the early evening hours in September the temperature will generally fall to somewhere in the vicinity of 80.0 degrees. Temperatures in St. Lucia average around 83.1 degrees during September.

Rain

Rain is most likely to occur around 8:00 AM during the month of September, and it is least likely to occur around 2:00 AM. In St. Lucia during September, thunderstorms – when they occur -- are most likely sometime around 8:00 PM.