Cayman Islands · AutumnMonth summary
Cayman Islands weather in September
✅ Good
🌡️ Temperature min / max
81°F – 88°F
🌧 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: Cayman Islands in September: 88°F and 11.0h of sunshine. Decent, but not the peak.
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°F, 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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Annual table
Month-by-month comparison
| Month | Min °F | Max °F | Rain % | Precip in | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 77°F | 81°F | 37% | 1.5in | 10.0h | 8.5/10 |
| 🌤️ February | 77°F | 82°F | 47% | 1.6in | 11.6h | 8.3/10 |
| 🌤️ March | 77°F | 82°F | 48% | 1.9in | 10.8h | 8.3/10 |
| 🌤️ April | 77°F | 84°F | 44% | 1.8in | 12.0h | 8.2/10 |
| ⛅ May | 79°F | 86°F | 65% | 4.5in | 11.6h | 7.5/10 |
| ⛅ June | 81°F | 86°F | 60% | 4.9in | 11.3h | 7.6/10 |
| 🌤️ July | 81°F | 88°F | 53% | 2.0in | 12.1h | 7.6/10 |
| 🌤️ August | 81°F | 88°F | 53% | 3.8in | 11.2h | 7.6/10 |
| ⛅ September | 81°F | 88°F | 68% | 3.9in | 11.0h | 7.4/10 |
| ⛅ October | 79°F | 86°F | 67% | 5.9in | 9.9h | 7.5/10 |
| 🌤️ November | 79°F | 82°F | 52% | 4.2in | 9.8h | 8.2/10 |
| 🌤️ December | 79°F | 82°F | 39% | 2.0in | 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 88°F, 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°F
- 🌧 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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Activities & tours
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