San José weather by month › September
San José in September: weather and what to expect
Wet. September falls in San José’s rainy season, with about 18.3 in (466 mm) of rain. For drier weather, go in January to March.
September weather in San José
Daytime high80°F 27°C
Night low61°F 16°C
Rain18 in 466 mm
AirHumid
SunSunny
In September, San José averages highs of 80°F (27°C) and lows of 61°F (16°C), with 18.3 in (466 mm) of rain. The air feels humid and the sun is sunny. 1991–2020 averages, not a forecast.
Pack: light layers, a rain jacket or umbrella.
Places with the same weather in September
Match out of 100 for September, one city per country.
- Pokhara Nepal · 83°F highs84
- San Salvador El Salvador · 83°F highs81
- Villa Nueva Guatemala · 79°F highs76
- Cuernavaca Mexico · 81°F highs75
- Bello Colombia · 79°F highs69
- Miyazaki Japan · 84°F highs68
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