Weather in St Lucia in september
Country-wide climate normals across 15 cities in St Lucia.
How Hot Is St Lucia in september?
St Lucia sees consistently hot September weather — average highs of 30°C, average lows of 27°C, with minimal regional differences. Whether you're in Gros Islet or one of the coastal cities, conditions feel broadly the same: hot, generally clear, with little night-time relief.
Sunshine in St Lucia in september
Persistent cloud and grey skies define St Lucia's September: about 1.2h of sun a day in Gros Islet. Daylight is in short supply too, running from 5:50 am to 6:05 pm, and most regions of the country see similar overcast conditions. Bright stretches are uncommon and brief.
Does It Rain In St Lucia In september?
Heavy rain shapes St Lucia's September: Gros Islet averages 142mm across 19 days, and most regions of the country see similar persistent wet conditions. Long sunny stretches are rare. Expect rain on roughly two out of every three days.
Is St Lucia Humid In september?
Mugginess defines St Lucia's September: humidity averages 75% in Gros Islet, and the air feels noticeably heavy across most regions. Sweat sits on the skin longer than it would in drier conditions, and overnight relief is limited. Pack light, breathable fabrics.
Wind In St Lucia In september
Breezy conditions cover St Lucia's September: Gros Islet sits at 22 kph on average, with the country as a whole feeling windy through the day. Afternoon winds pick up across most cities, and coastal regions often run significantly higher.
Cloud Cover In St Lucia In september
Heavy overcast covers St Lucia in September: 77% cloud cover in Gros Islet, with similar grey conditions in most regions. Direct sun is rare, and the pattern is persistent across the country. Coastal and northern regions feel especially heavy.