Weather in Bilbao in June

Prime time. If you get to pick your dates, June is the one. Highs average 21.1 °C, lows 16.7 °C, and rain falls on 9 days — nothing in the month is working against you.

June ranks 3 of 12 in Bilbao. 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

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average June reaches 30 °C; the day barely swings — 4.4 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest June day reached 34.4 °C and the coldest night fell to 12.4 °C, and the wettest single day dropped 62 mm — roughly 111% of the month's rain in one day.

June is moderately variable: 11 mm in the driest year against 150 mm in the wettest, around an average of 56 mm. Roughly two Junes in three land near that average, and the third does something else entirely.

Wind is light at 12.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 78%, high enough to notice on the warm days without dominating them.

How June sits in the year

The month is on the way up: 3.3 °C warmer than May, and July adds another 2.1 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in June

June is at or near the longest days of Bilbao's year: 15.4 hours of daylight, holding steady all month. Evenings are the real gain — dinner outdoors still happens in full light.

Sea temperature

The sea sits at about 18.4 °C in June — swimmable, but it takes a moment to commit. The sea peaks at 21.9 °C in August and bottoms out at 12.5 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

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.

June in Bilbao versus nearby

If Bilbao is one option among several, the nearby comparison is worth making. Gasteiz / Vitoria is close enough to be a coin toss — within a degree on temperature, 1 day more rain. Gijón is close enough to be a coin toss — within a degree on temperature, 1 day more rain.

So: June 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 Bilbao

See all twelve months in Bilbao, or where else to go in June.