What is the weather like in Ilha Grande vs Porto Alegre in September?

In September, Ilha Grande averages 18°C high / 14°C low with about 76 mm of rain; Porto Alegre averages 23°C high / 14°C low with about 171 mm.

Ilha Grande vs Porto Alegre in September

Ilha Grande is the better pick in September — 85 vs 81 on SeasonMap's comfort score. Ilha Grande is nice, a little rain, muggy air, while Porto Alegre is nice, soaked, muggy air.

Ilha Grande vs Porto Alegre — September climate, side by side

	🇧🇷 Ilha Grande	🇧🇷 Porto Alegre
Comfort score	85/100 (A)	81/100 (A)
Feels-like high	18°C	23°C
Avg high / low	18° / 14°	23° / 14°
Rainfall	76 mm	171 mm
Rainy days	11	11
Humidity	81%	80%
Air quality (AQI)	76	52

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

Month by month

Ilha Grande vs Porto Alegre in September — FAQ

Is September better in Ilha Grande or Porto Alegre?: Ilha Grande is the better pick in September — 85 vs 81 on SeasonMap's comfort score. Ilha Grande is nice, a little rain, muggy air, while Porto Alegre is nice, soaked, muggy air.
What is the weather like in Ilha Grande vs Porto Alegre in September?: In September, Ilha Grande averages 18°C high / 14°C low with about 76 mm of rain; Porto Alegre averages 23°C high / 14°C low with about 171 mm.