In September, the Vía Augusta usually has warm to hot weather with mostly sunny days. When you start in the southern coastal areas of Andalucía, expect high temperatures of 29-32°C and lows of 20-22°C. While sunny days are common, you might see some clouds and light rain now and then.
As you go inland to places like Sevilla, it gets a bit hotter, with daytime highs up to 35°C but the same night temperatures of 20-21°C. Rain is less likely, and most days are dry and sunny. However, there's still a small chance of light rain.
In general, the September weather along the Vía Augusta is hot, sunny, and has little rain. Make sure to stay hydrated and protect yourself from the sun.
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