Saint Lucia · AutumnMonth summary
Saint Lucia weather in September
✅ Good
🌡️ Temperature min / max
24°C – 30°C
🌧 Rainy days
69% of days
☀️ Sunshine
12.0h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
7.3/10
📅 📅 Best month
March (8.2/10)
Quick decision
Should you visit Saint Lucia in September?
✅ Good
✅ Yes if: you're willing to accept showers in exchange for lower prices and fewer tourists.
❌ No if: you're planning 100% outdoor activities — rain is frequent.
Our take: Favourable conditions in September (7.3/10). March scores higher but the gap is small.
By trip type
Saint Lucia in September by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ⚠️ Possible
- 🏖️ Beach / swimming : ⚠️ Possible
- 💰 💰 Budget : ✅ Low season
Local context
What to expect in September
🎯 Hike early morning to avoid the heat — temperatures reach 30°C by 11am Autumn in Saint Lucia is often underrated: 30°C, golden light and declining crowds. An interesting window. With 69% of rainy days, always have indoor alternatives planned. Not the best window, but acceptable if dates are constrained. March (8.2/10) is significantly better if possible.
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All months for Saint Lucia
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 22°C | 27°C | 53% | 1.7 | 10.9h | 7.8/10 |
| 🌤️ February | 21°C | 27°C | 45% | 1.5 | 11.1h | 8.0/10 |
| 🌤️ March | 22°C | 28°C | 46% | 1.3 | 11.7h | 8.2/10 |
| 🌤️ April | 22°C | 29°C | 41% | 1.3 | 12.0h | 8.2/10 |
| 🌤️ May | 23°C | 29°C | 46% | 1.5 | 12.0h | 8.0/10 |
| ⛅ June | 24°C | 29°C | 61% | 2.5 | 12.0h | 7.6/10 |
| ⛅ July | 23°C | 29°C | 73% | 3.5 | 12.0h | 7.3/10 |
| ⛅ August | 24°C | 29°C | 68% | 3.0 | 12.0h | 7.4/10 |
| ⛅ September | 24°C | 30°C | 69% | 3.3 | 12.0h | 7.3/10 |
| ⛅ October | 23°C | 29°C | 65% | 3.0 | 11.4h | 7.4/10 |
| ⛅ November | 23°C | 28°C | 62% | 3.0 | 11.0h | 7.6/10 |
| 🌤️ December | 22°C | 27°C | 55% | 1.6 | 10.9h | 7.8/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In September, Saint Lucia averages 30°C, 69% rainy days and 12.0h of sunshine per day. Overall weather score: 7.3/10.
See methodology →
Comparison
September vs March (best month)
The best month is March (score 8.2/10). Difference:
- 🌡️ Max temperature : -2°C
- 🌧 Rainy days : -23%
- ☀️ Sunshine : -0.3h/day
FAQ
FAQ — Saint Lucia in September
Is September a good time to visit Saint Lucia?
September is an acceptable time for Saint Lucia (score 7.3/10). Conditions are decent but not optimal — consider March (8.2/10) if possible.
Does it rain a lot in Saint Lucia in September?
Yes, 69% of days see rain in September. Plan some indoor activities as backup.
Accommodation
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Activities & tours
Activities and tours in Saint Lucia
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