St Lucia
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St Lucia Weather in September

September in St Lucia sees daytime temperatures around 24°C (75°F) and lows of 19°C (66°F) at night. With around 61 mm (2.4 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in St Lucia in September

Rain is expected on roughly 9 days, totalling around 61 mm (2.4 in) for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in St Lucia in September

Weather in St Lucia is at its excellent in September. Highs reach 24°C (75°F), while nights settle around 19°C (66°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights drop to around 19°C (66°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. April, May, June, July, August, September and October typically offer the best weather for St Lucia.

St Lucia Temperature in September

Min Temperature
19°C (66°F)
Max Temperature
24°C (75°F)
Chance of Rain
29%
Precipitation
61 mm (2.4 in)
Rainy days
9 days

St Lucia Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in St Lucia - and find the best time to visit.

Best Places in South Africa in September

Find out more about the weather in South Africa and which places have the best travel conditions in this month. See all of South Africa in September →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in St Lucia in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days.

What To Do in St Lucia in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Cycling
    10/10
  • Walking
    10/10
  • Camping
    8/10
  • Outdoor sports
    10/10

St Lucia 3-Day Forecast

More climate data for St Lucia

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.