St Lucia Temperature by Month

St Lucia in KwaZulu-Natal, South Africa enjoys a stable climate, with daytime temperatures staying close to 26°C (79°F) throughout the year. Explore the full monthly breakdown below.

In St Lucia temperatures are generally consistent throughout the year. Maximum daytime temperatures range from a comfortable 24°C (75°F) in July to a comfortable 29°C (84°F) in February. Nighttime lows range from 24°C (75°F) in February to 18°C (64°F) in July.

The chart below illustrates the average maximum day and minimum night temperatures in St Lucia by month:

Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM.

The chart below shows the average temperature throughout the year:

St Lucia's average annual maximum temperature is 26°C (79°F). To put that in context, here's how it compares to a few well-known destinations:

Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on St Lucia's weather, including monthly rainfall, sunshine hours, and humidity, visit our St Lucia climate page.