Spain Weather Shift: Temperatures Drop Up to 10°C and Rain Hits the North 2026

Spain is experiencing an unexpected weather shift this September, with temperatures set to plunge by up to 10°C in some areas and rain returning to the north. After an unusually warm start to the month, an Atlantic front will sweep across the peninsula, bringing relief from the heat but also heavy precipitation.

What's Causing the Sudden Change?

A front associated with Atlantic circulation will move across the Iberian Peninsula between Tuesday and Wednesday. This system is responsible for the dramatic drop in temperatures and the arrival of much-needed rain.

The shift comes after a period of extraordinarily high temperatures that followed a milder end to August. Many regions have been sweltering, but this front promises to bring conditions more typical of late summer.

Where Will the Temperature Drop Be Felt Most?

The most significant temperature decreases will occur in northern and western areas of Spain. Maximum temperatures could fall by more than 6°C, and in some spots, they may approach 10°C lower than recent days.

Regions such as Galicia and Asturias will finally see temperatures more in line with the end of summer. However, the southeast and the Canary Islands will continue to experience elevated temperatures, so the heat isn't over for everyone.

Regional Breakdown

Here's a quick look at how different parts of Spain will be affected:

• Galicia and Asturias: Significant temperature drops and heavy rain, with over 40 liters per square meter possible in less than 12 hours.
• Western half: Noticeable temperature decreases, though less pronounced than in the far north.
• Valencian Community, Andalusia, and Gran Canaria: Temperatures will remain high, with little relief.
• Southeast and Canary Islands: Continued heat, as the front's effects are limited to the north and west.

Rainfall Forecast: Where and How Much?

The front will enter from the northwest on Tuesday, bringing precipitation primarily to Galicia and Asturias. According to AEMET, more than 40 liters per square meter could fall in under 12 hours in these areas.

Other parts of the country will miss out on the rain, which many have been hoping for. Instead, they will only experience a gradual drop in temperatures, if anything.

How Does This Compare to Typical September Weather?

September in Spain often marks a transition from the hot summer to milder autumn conditions. However, this month started with unusually high temperatures, making this sudden cool-down more notable.

The table below compares the expected conditions with typical September averages for key regions: The background to this story is set out in Europe Temperature Drop: UK Rain Forecast and Cooler Weather. A related thread runs through Europe Weather Forecast: Rain and Temperature Drop Ahead. Earlier coverage in Spain's AEMET Forecast: No Autumn in Sight as Heat Persists shows how the argument developed.

What to Watch Next

As the front progresses, temperatures will gradually decrease across the western half of the country. However, the southeast and the Canary Islands will likely stay warm, so residents there should continue to take precautions against the heat. A closer look at the same subject appears in England Heat Alert: 30C Temperatures and Health Risks. Anyone following the wider picture can start with UK Heat Alert: 30C Temperatures and Health Risks. The same theme surfaces in NYC Subway Heat Crisis: 132F Temperatures Exposed, which takes a different angle.

For the north, the rain will be a welcome change, but the heavy downpours could lead to localized flooding. Keep an eye on updates from AEMET for any warnings. Context on how this played out before sits in Spain Thunderstorms and Japan Typhoon: Extreme Weather Tracker. A companion piece, Maximum workplace temperatures: How employers can keep, approaches the same subject from another angle.