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Miami in September: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Miami in September is climatically mixed. The average daily high is around 29 °C, and the sea is about 29 °C. With about 26 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
55/100 · #10
Warmth
#3
Dryness
#10
Sun
#7
Sea warmth
#2
Published best categories: none
Miami · SeptemberPhoto: Robbschultz69 · CC BY-SA 4.0Climate facts
- Average high
- 29 °C
- Average low
- 28 °C
- Sea
- 29 °C
- Rainy days (est.)
- 26 rainy days (est.)
- Sun (est.)
- 7 h/day
- Humidity
- 78 %
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 | 28 | 28 | 181 | 7.5 | 77 | 3.3 | 30 | 52 |
| September (selected) | 29 | 28 | 26 | 196 | 6.5 | 78 | 3.6 | 29 | 55 |
| October | 28 | 26 | 18 | 138 | 5.6 | 77 | 4.5 | 28 | 64 |
How do the previous and next months compare?
Baseline: September (55/100)
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 | -3 | +0.7 °C | +0.6 °C | +1.4 | -15.1 mm | +1 h | -1.3 % | -0.2 m/s | +0.4 °C |
| October | +9 | -1.4 °C | -1.7 °C | -8.1 | -57.5 mm | -0.9 h | -1.5 % | +1 m/s | -1 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Miami in September?
The average daily high is around 29 °C, with an average daily low of about 28 °C.
Can you swim in Miami in September?
The sea is about 29 °C (very warm).
Does it rain a lot in Miami in September?
The curated estimate is about 26 rainy days per month, not a directly measured long-term average. Total precipitation averages around 196 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Miami?
By the climate score, February, March, April and December are the strongest months for Miami. For a beach trip: February, March, April and November. September is not among them.