Spain’s on the Iberian Peninsula in Southeast Europe. There’s different weather across different regions, although if you’re going in September you can generally look forward to high temperatures around the country. The differences come from Spain’s size, coastlines and mountains with the Atlantic and Mediterranean Oceans influencing the weather.The best time to travel in Spain is spring and fall because that is when good weather occurs. The months of September, and October are very good for travel. Summer is quite hot, especially in inland cities like Seville, Cordoba, and Madrid.