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Ambergris Caye in September: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Ambergris Caye in September is climatically mixed. The average daily high is around 30 °C, and the sea is about 30 °C. With about 22 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
53/100 · #12
Warmth
#5
Dryness
#12
Sun
#7
Sea warmth
#1
Published best categories: none
Ambergris Caye · SeptemberPhoto: Cayo Espanto Private Island · CC BY-SA 4.0Climate facts
- Average high
- 30 °C
- Average low
- 27 °C
- Sea
- 30 °C
- Rainy days (est.)
- 22 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 84 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| August | 30 | 27 | 20 | 160 | 6.9 | 81 | 2.0 | 29 | 54 |
| September (selected) | 30 | 27 | 22 | 189 | 6.3 | 84 | 1.8 | 30 | 53 |
| October | 29 | 26 | 21 | 227 | 5.8 | 85 | 1.9 | 29 | 57 |
How do the previous and next months compare?
Baseline: September (53/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| August | +1 | +0.3 °C | +0.1 °C | -2.2 | -29.6 mm | +0.6 h | -2.3 % | +0.2 m/s | -0.2 °C |
| October | +4 | -1 °C | -1.1 °C | -1.1 | +38.3 mm | -0.5 h | +1.4 % | ±0 m/s | -0.6 °C |
All twelve months in context
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Where to stay in Ambergris Caye
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Useful next decisions
Frequently asked questions
How warm is Ambergris Caye in September?
The average daily high is around 30 °C, with an average daily low of about 27 °C.
Can you swim in Ambergris Caye in September?
The sea is about 30 °C (very warm).
Does it rain a lot in Ambergris Caye in September?
The curated estimate is about 22 rainy days per month, not a directly measured long-term average. Total precipitation averages around 189 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Ambergris Caye?
By the climate score, January, February, March and April are the strongest months for Ambergris Caye. For a beach trip: January, February, March and April. September is not among them.