Weather in Vigo in September

Prime time. If you get to pick your dates, September is the one. Highs average 25.3 °C, lows 15.1 °C, and rain falls on 7 days — nothing in the month is working against you.

September ranks 4 of 12 in Vigo: past the worst of the year but short of July, which is the month to book if the dates are open.

Rain on 7 days, 2 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

Averages flatten a month, and this one hides a few things: 4 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest September day reached 35.2 °C and the coldest night fell to 9.6 °C, and the wettest single day dropped 51 mm — roughly 104% of the month's rain in one day.

September is moderately variable: 13 mm in the driest year against 107 mm in the wettest, around an average of 49 mm. Roughly two Septembers in three land near that average, and the third does something else entirely.

Wind is light at 4 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 69%.

How September sits in the year

The month is on the way down: 1.6 °C cooler than August, with October dropping another 4.5 °C. The first week and the last are not the same trip. Rain is the thing that moves: October brings 7 days more of it, so the earlier half of a flexible trip is the safer half.

Daylight in September

12.6 hours of daylight, losing 1.4 hours across the month. That is between Vigo's extremes of 15.2 and 9.1 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 18.5 °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 Vigo versus nearby

If Vigo is one option among several, the nearby comparison is worth making. Braga is close enough to be a coin toss — 3.5 °C warmer, 1 day less rain. Aveiro is close enough to be a coin toss — within a degree on temperature, 1 day less rain.

So: September is effectively as good as it gets here — 5 points behind July, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Vigo

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