Weather in Gijón in September

Prime time. If you get to pick your dates, September is the one. Highs average 24.2 °C, lows 16.2 °C, and rain falls on 9 days — nothing in the month is working against you.

September ranks 3 of 12 in Gijón. Only July scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 9 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest September day reached 34.2 °C and the coldest night fell to 9.7 °C, and the wettest single day dropped 33 mm — roughly 70% of the month's rain in one day.

September is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest September on record still delivered 77 mm against 22 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 47 mm average is a reasonable planning figure, not a promise.

Wind is light at 9.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 74%.

How September sits in the year

Temperatures hold steady either side: 25.7 °C in August, 24.2 here, 21.4 in October. Nothing about the timing within the month matters much.

Daylight in September

12.6 hours of daylight, losing 1.5 hours across the month. That is between Gijón's extremes of 15.4 and 9 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 20 °C in September — swimmable, but it takes a moment to commit. This is the warmest the water gets all year.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

September in Gijón versus nearby

If Gijón is one option among several, the nearby comparison is worth making. Valladolid is close enough to be a coin toss — 2 °C warmer, 4 days less rain. Bilbao is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: September is effectively as good as it gets here — 2 points behind July, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Gijón

See all twelve months in Gijón, or where else to go in September.