What is the weather like in Alter do Chão vs Rio de Janeiro in September?

In September, Alter do Chão averages 33°C high / 26°C low with about 48 mm of rain; Rio de Janeiro averages 29°C high / 20°C low with about 60 mm.

Alter do Chão vs Rio de Janeiro in September

Alter do Chão and Rio de Janeiro are nearly tied in September — 87 vs 88 on SeasonMap's comfort score. Alter do Chão is sweltering, a little rain, clean air; Rio de Janeiro is hot, a little rain.

Alter do Chão vs Rio de Janeiro — September climate, side by side

	🇧🇷 Alter do Chão	🇧🇷 Rio de Janeiro
Comfort score	87/100 (A)	88/100 (A)
Feels-like high	38°C	31°C
Avg high / low	33° / 26°	29° / 20°
Rainfall	48 mm	60 mm
Rainy days	7	9
Humidity	71%	74%
Air quality (AQI)	43	70

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

Month by month

Alter do Chão vs Rio de Janeiro in September — FAQ

Is September better in Alter do Chão or Rio de Janeiro?: Alter do Chão and Rio de Janeiro are nearly tied in September — 87 vs 88 on SeasonMap's comfort score. Alter do Chão is sweltering, a little rain, clean air; Rio de Janeiro is hot, a little rain.
What is the weather like in Alter do Chão vs Rio de Janeiro in September?: In September, Alter do Chão averages 33°C high / 26°C low with about 48 mm of rain; Rio de Janeiro averages 29°C high / 20°C low with about 60 mm.