Cayman Islands · AutumnMonth summary
Cayman Islands weather in September
✅ Good
🌡️ Temperature min / max
27°C – 31°C
🌧 Rainy days
68% of days
☀️ Sunshine
11.0h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
7.4/10
📅 📅 Best month
January (8.5/10)
Quick decision
Should you visit Cayman Islands 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: September is a good time to visit Cayman Islands. January remains slightly better (+1.1 pts).
By trip type
Cayman Islands 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
Autumn in Cayman Islands is often underrated: 31°C, golden light and declining crowds. An interesting window. With 68% of rainy days, always have indoor alternatives planned. Not the best window, but acceptable if dates are constrained. January (8.5/10) is significantly better if possible.
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All months for Cayman Islands
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 25°C | 27°C | 37% | 38.1 | 10.0h | 8.5/10 |
| 🌤️ February | 25°C | 28°C | 47% | 40.7 | 11.6h | 8.3/10 |
| 🌤️ March | 25°C | 28°C | 48% | 47.9 | 10.8h | 8.3/10 |
| 🌤️ April | 25°C | 29°C | 44% | 45.0 | 12.0h | 8.2/10 |
| ⛅ May | 26°C | 30°C | 65% | 114.7 | 11.6h | 7.5/10 |
| ⛅ June | 27°C | 30°C | 60% | 124.2 | 11.3h | 7.6/10 |
| 🌤️ July | 27°C | 31°C | 53% | 51.4 | 12.1h | 7.6/10 |
| 🌤️ August | 27°C | 31°C | 53% | 96.5 | 11.2h | 7.6/10 |
| ⛅ September | 27°C | 31°C | 68% | 99.8 | 11.0h | 7.4/10 |
| ⛅ October | 26°C | 30°C | 67% | 151.0 | 9.9h | 7.5/10 |
| 🌤️ November | 26°C | 28°C | 52% | 107.6 | 9.8h | 8.2/10 |
| 🌤️ December | 26°C | 28°C | 39% | 50.0 | 9.8h | 8.5/10 |
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, Cayman Islands averages 31°C, 68% rainy days and 11.0h of sunshine per day. Overall weather score: 7.4/10.
See methodology →
Comparison
September vs January (best month)
The best month is January (score 8.5/10). Difference:
- 🌡️ Max temperature : -4°C
- 🌧 Rainy days : -31%
- ☀️ Sunshine : -1.0h/day
FAQ
FAQ — Cayman Islands in September
Is September a good time to visit Cayman Islands?
September is an acceptable time for Cayman Islands (score 7.4/10). Conditions are decent but not optimal — consider January (8.5/10) if possible.
Does it rain a lot in Cayman Islands in September?
Yes, 68% of days see rain in September. Plan some indoor activities as backup.
Accommodation
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