What is the weather like in Cancún vs Key West in September?

In September, Cancún averages 31°C high / 25°C low with about 175 mm of rain; Key West averages 32°C high / 26°C low with about 195 mm.

Cancún vs Key West in September

Cancún and Key West are nearly tied in September — 78 vs 76 on SeasonMap's comfort score. Cancún is sweltering, soaked, clean air; Key West is sweltering, soaked, clean air.

Cancún vs Key West — September climate, side by side

	Cancún	Key West
Comfort score	78/100 (B)	76/100 (B)
Feels-like high	37°C	37°C
Avg high / low	31° / 25°	32° / 26°
Rainfall	175 mm	195 mm
Rainy days	23	13
Humidity	82%	79%
Air quality (AQI)	35	35

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

Cancún vs Key West in September — FAQ

Is September better in Cancún or Key West?: Cancún and Key West are nearly tied in September — 78 vs 76 on SeasonMap's comfort score. Cancún is sweltering, soaked, clean air; Key West is sweltering, soaked, clean air.
What is the weather like in Cancún vs Key West in September?: In September, Cancún averages 31°C high / 25°C low with about 175 mm of rain; Key West averages 32°C high / 26°C low with about 195 mm.