While Spain doesn't get as much rainfall as other European countries, some rain is a possibility at any time of year. Remember that we're talking averages here. Weather throughout the world is unpredictable, so don't take what you read on this page as gospel.
If you're planning just a short trip to Spain in September, check out this page on Weekend Breaks in Spain.
Weather in Madrid in SeptemberSummer in Madrid can be uncomfortably warm and if the hot season outstays its welcome, September might still be a little unpleasant. However, most likely Madrid will be hot but bearable this month.
The average maximum temperature in Madrid in September is 82°F/28°C and the average minimum temperature is 55°F/13°C.
Read more about Madrid
Weather in Barcelona in SeptemberIt's still summer in September in Barcelona and beaches will still be populated by northern Europeans looking for a tan. However, Barcelona doesn't tend to get quite as hot as Madrid and the temperatures here won't as fierce as they tend to be in the capital.
The average maximum temperature in Barcelona in September is 79°F/26°C and the average minimum temperature is 63°F/17°C.
Read more about Barcelona
Weather in Andalusia in September
Andalusia is Spain's sunniest region and you'd be unlucky to not get good weather all over the region for the entire month. Seville (like Madrid) may still be unbearably hot, but the coastal cities will be more temperate.
The average maximum temperature in Malaga in September is 82°F/28°C and the average minimum temperature is 64°F/18°C.
Read more about Andalusia
Weather in Northern Spain in SeptemberNorthern Spain is not as reliable as the south when it comes to weather, but you can be pretty confident that the weather in September will be mainly good, though there is a fair chance of rain for a few days each month.
The average maximum temperature in Bilbao in September is 75°F/24°C and the average minimum temperature is 57°F/14°C.
Weather in North-West Spain in September
It's not all good news. While most of the country usually enjoys summer well into September, the inhabitants of Galicia and Asturias get temperatures that are several degrees lower than in other regions. That said, it's not all doom and gloom - there are more dry days than there are wet days in Galicia in September, so chin up!
The average maximum temperature in Santiago de Compostela in September is 70°F and the average minimum temperature is 59°F/15°C.
Read more about North-West Spain