San Juan weather by month › September
San Juan in September: weather and what to expect
Wet. September falls in San Juan’s rainy season, with about 6.5 in (166 mm) of rain. For drier weather, go in February.
September weather in San Juan
Daytime high90°F 32°C
Night low74°F 23°C
Rain6.5 in 166 mm
AirMuggy
SunSunny
In September, San Juan averages highs of 90°F (32°C) and lows of 74°F (23°C), with 6.5 in (166 mm) of rain. The air feels muggy and the sun is sunny. 1991–2020 averages, not a forecast.
Pack: light clothes and sun protection, a rain jacket or umbrella.
Places with the same weather in September
Match out of 100 for September, one city per country.
- Guantánamo Cuba · 90°F highs96
- Thiès Senegal · 90°F highs96
- Cancún Mexico · 92°F highs95
- New Kingston Jamaica · 88°F highs94
- Jammu India · 92°F highs94
- San Pedro Sula Honduras · 93°F highs94
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