In Valencia, the weather in September is usually nice and warm, around 29-31°C. It's usually sunny, but sometimes it can rain a little bit. You might also have some cloudy days which can bring some nice cool relief.
Then you'll go into Castilla-La Mancha. Here the temperature is slightly lower, ranging from 26-28°C. The chances of rain increase a bit and it can sometimes be moderate or scattered showers. Along with these are sunny spells and some partially cloudy days.
Moving forward into Castilla y León, the temperature goes down a bit more, to around 22-24°C. The weather's a mix of sunny, partial cloudiness, and some moderate rainfalls.
By the time you get to Zamora, the temperature is about the same, but it can go down to about 13°C at night. The weather still can be sunny, cloudy, and there's always a chance for light to moderate rain.
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