SeasonMapThe Valley (Anguilla) weather in September
Anguilla
September in The Valley: warm, rainy, with clean air — a good time to visit.
#11 of 12 months in The Valley · #1041 of 1383 destinations to visit in September · comfort 66/100 (tier C)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on The Valley in September
No notes yet. Open The Valley on the map to add the first one.
The Valley climate normals — September
| Daytime high | 28°C / 83°F | 🌤 warm |
|---|---|---|
| Nighttime low | 27°C / 80°F | |
| Sea temperature | 30°C / 87°F | ♨️ bath-warm |
| Rainfall | 110 mm / 4.3 in | 🌧 rainy |
| Rainy days | 17 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 24°C / 76°F | |
| Sunshine | 10.9 h/day | |
| Daylight | 12.2 h | |
| Wind | 26 km/h / 16 mph | |
| Air quality (US AQI) | 38 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in The Valley in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Quietschool holidays in 2 of the markets that fill it, one of its worst months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for The Valley's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherThe Valley's weather peaks February–April, best around March.
September coincides with Sargassum season.
Best weatherFair weatherToughest weather
What's on in The Valley in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Hazard
Sargassum season
1 May – 30 Sep · usuallyAnguilla is hit less hard than islands further south, but weed still lands on the south and northeast coasts most years - Savannah Bay, Sandy Hill Bay and Shoal Bay East are the names locals watch. How bad a season gets varies week to week rather than by the month. Source ↗
- Hazard
Hurricane season
1 Jun – 30 NovIrma made a direct Category 5 hit in September 2017, doing an estimated US$320 million in damage and knocking out the House of Assembly and the ferry terminal at Blowing Point for months. Most seasons pass without a direct strike, but the island is low and flat with nowhere to hide from one that does. Source ↗
- Closure
Off-season hotel closures
16 Aug – 15 Oct · usuallySeveral of the island's biggest names close for repairs and staff leave between mid-August and mid-October, Cap Juluca and the Four Seasons among them. Rates at what stays open are the lowest of the year, and villas and a handful of restaurants keep going regardless. Source ↗
Nearby, and something's on
Within 300 km of The Valley — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is The Valley?
The Valley in September — FAQ
- Is September a good time to visit The Valley?
- September in The Valley: warm, rainy, with clean air — a good time to visit. It ranks #11 of 12 months for The Valley on SeasonMap's comfort score (66/100).
- What is the weather like in The Valley in September?
- In September, The Valley averages a daily high of 28.4°C and a low of 26.8°C, with about 110.2 mm of rain over roughly 17 rainy days.
- What is the air quality in The Valley in September?
- The Valley has a mean US Air Quality Index of about 38 in September.
Other months in The Valley
Compare The Valley in September
Warmer or cooler than The Valley in September
Similar destinations in Caribbean — September
Within 300 km: Philipsburg's Sea turtle nesting around 1 Apr – 30 Nov.