Manuel Antonio weather in September
September in Manuel Antonio: warm, soaked, with clean air — a gamble, with 30 rainy days.
#10 of 12 months in Manuel Antonio · #765 of 897 destinations to visit in September · comfort 63/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Manuel Antonio in September
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Manuel Antonio climate normals — September
| Daytime high | 27°C / 80°F | 🌤 warm |
|---|---|---|
| Nighttime low | 22°C / 71°F | |
| Rainfall | 870 mm / 34.2 in | ⛈ soaked |
| Rainy days | 30 days | |
| Humidity | 93% | 💦 very humid |
| Dew point | 23°C / 74°F | |
| Sunshine | 7.4 h/day | |
| Daylight | 12.2 h | |
| Wind | 9 km/h / 6 mph | |
| Air quality (US AQI) | 23 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Manuel Antonio in September — FAQ
- Is September a good time to visit Manuel Antonio?
- September in Manuel Antonio: warm, soaked, with clean air — a gamble, with 30 rainy days. It ranks #10 of 12 months for Manuel Antonio on SeasonMap's comfort score (63/100).
- What is the weather like in Manuel Antonio in September?
- In September, Manuel Antonio averages a daily high of 26.5°C and a low of 21.7°C, with about 869.8 mm of rain over roughly 30 rainy days.
- What is the air quality in Manuel Antonio in September?
- Manuel Antonio has a mean US Air Quality Index of about 23 in September.