What is the weather like in Ilha Grande vs Rio de Janeiro in September?

In September, Ilha Grande averages 18°C high / 14°C low with about 76 mm of rain; Rio de Janeiro averages 29°C high / 20°C low with about 60 mm.

Ilha Grande vs Rio de Janeiro in September

Ilha Grande and Rio de Janeiro are nearly tied in September — 85 vs 88 on SeasonMap's comfort score. Ilha Grande is nice, a little rain, muggy air; Rio de Janeiro is hot, a little rain.

Ilha Grande vs Rio de Janeiro — September climate, side by side

	🇧🇷 Ilha Grande	🇧🇷 Rio de Janeiro
Comfort score	85/100 (A)	88/100 (A)
Feels-like high	18°C	31°C
Avg high / low	18° / 14°	29° / 20°
Rainfall	76 mm	60 mm
Rainy days	11	9
Humidity	81%	74%
Air quality (AQI)	76	70

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

Month by month

Ilha Grande vs Rio de Janeiro in September — FAQ

Is September better in Ilha Grande or Rio de Janeiro?: Ilha Grande and Rio de Janeiro are nearly tied in September — 85 vs 88 on SeasonMap's comfort score. Ilha Grande is nice, a little rain, muggy air; Rio de Janeiro is hot, a little rain.
What is the weather like in Ilha Grande vs Rio de Janeiro in September?: In September, Ilha Grande averages 18°C high / 14°C low with about 76 mm of rain; Rio de Janeiro averages 29°C high / 20°C low with about 60 mm.