Jamaica
Jamaica in September: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Jamaica in September is climatically mixed. The average daily high is around 30 °C, and the sea is about 30 °C. With about 27 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
50/100 · #11
Warmth
#3
Dryness
#12
Sun
#7
Sea warmth
#1
Published best categories: none
Jamaica · SeptemberPhoto: Oleg Yunakov · CC BY-SA 4.0Climate facts
- Average high
- 30 °C
- Average low
- 27 °C
- Sea
- 30 °C
- Rainy days (est.)
- 27 rainy days (est.)
- Sun (est.)
- 7 h/day
- Humidity
- 76 %
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 | 31 | 27 | 26 | 145 | 7.7 | 75 | 4.1 | 30 | 50 |
| September (selected) | 30 | 27 | 27 | 193 | 7.2 | 76 | 3.5 | 30 | 50 |
| October | 30 | 27 | 26 | 209 | 6.3 | 78 | 3.8 | 30 | 53 |
How do the previous and next months compare?
Baseline: September (50/100)
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 | ±0 | +0.3 °C | -0.1 °C | -0.2 | -47.6 mm | +0.5 h | -0.2 % | +0.6 m/s | -0.3 °C |
| October | +3 | -0.8 °C | -0.5 °C | -0.3 | +15.6 mm | -0.9 h | +2 % | +0.3 m/s | -0.3 °C |
All twelve months in context
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Where to stay in Jamaica
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Useful next decisions
Frequently asked questions
How warm is Jamaica in September?
The average daily high is around 30 °C, with an average daily low of about 27 °C.
Can you swim in Jamaica in September?
The sea is about 30 °C (very warm).
Does it rain a lot in Jamaica in September?
The curated estimate is about 27 rainy days per month, not a directly measured long-term average. Total precipitation averages around 193 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Jamaica?
By the climate score, January, February, March and December are the strongest months for Jamaica. For a beach trip: January, February, March and April. September is not among them.