What is the weather like in Cayo Coco vs San Juan in September?

In September, Cayo Coco averages 32°C high / 25°C low with about 151 mm of rain; San Juan averages 32°C high / 26°C low with about 147 mm.

Cayo Coco vs San Juan in September

Cayo Coco is the better pick in September — 79 vs 61 on SeasonMap's comfort score. Cayo Coco is sweltering, soaked, clean air, while San Juan is sweltering, rainy, clean air.

Cayo Coco vs San Juan — September climate, side by side

	🇨🇺 Cayo Coco	🇵🇷 San Juan
Comfort score	79/100 (B)	61/100 (C)
Feels-like high	38°C	38°C
Avg high / low	32° / 25°	32° / 26°
Rainfall	151 mm	147 mm
Rainy days	20	13
Humidity	79%	83%
Air quality (AQI)	31	29

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Cayo Coco vs San Juan in September — FAQ

Is September better in Cayo Coco or San Juan?: Cayo Coco is the better pick in September — 79 vs 61 on SeasonMap's comfort score. Cayo Coco is sweltering, soaked, clean air, while San Juan is sweltering, rainy, clean air.
What is the weather like in Cayo Coco vs San Juan in September?: In September, Cayo Coco averages 32°C high / 25°C low with about 151 mm of rain; San Juan averages 32°C high / 26°C low with about 147 mm.