Miami weather in September
September in Miami: sweltering, soaked, with clean air — a great time to visit.
#10 of 12 months in Miami · #342 of 604 destinations to visit in September · comfort 78/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Miami climate normals — September
| Daytime high | 30°C / 85°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 26°C / 78°F | |
| Feels like (high) | 35°C / 95°F | |
| Rainfall | 187 mm / 7.3 in | ⛈ soaked |
| Rainy days | 21 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 24°C / 74°F | |
| Sunshine | 9.8 h/day | |
| Daylight | 12.3 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 37 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Miami in September — FAQ
- Is September a good time to visit Miami?
- September in Miami: sweltering, soaked, with clean air — a great time to visit. It ranks #10 of 12 months for Miami on SeasonMap's comfort score (78/100).
- What is the weather like in Miami in September?
- In September, Miami averages a daily high of 29.6°C and a low of 25.7°C, with about 186.6 mm of rain over roughly 21.4 rainy days.
- What is the air quality in Miami in September?
- Miami has a mean US Air Quality Index of about 37 in September.