Weather in Lisbon in June

Prime time. If you get to pick your dates, June is the one. Highs average 21 °C, lows 16.4 °C, and rain falls on 3 days — nothing in the month is working against you.

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

Rain falls on only 3 days, so an itinerary with no wet-weather fallback is a reasonable risk. 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 — 4.5 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest June day reached 29.8 °C and the coldest night fell to 13.3 °C.

This is the volatile part. June rainfall has ranged from 1 mm to 30 mm across the twenty years measured — a 29 mm spread around an average of 11 mm. The average is real but almost no individual June looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind sits around 16.4 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity runs at 80%, high enough to notice on the warm days without dominating them.

How June sits in the year

Temperatures hold steady either side: 19 °C in May, 21 here, 22.2 in July. Nothing about the timing within the month matters much.

Daylight in June

June is at or near the longest days of Lisbon's year: 14.9 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 18.7 °C in June — swimmable, but it takes a moment to commit. The sea peaks at 20.7 °C in September and bottoms out at 15.3 °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. If the dates are flexible, May is the trade worth considering — 12 points weaker on weather, and materially quieter.

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

June in Lisbon versus nearby

If Lisbon is one option among several, the nearby comparison is worth making. Évora is the weaker option in June — 9.5 °C warmer, the same number of rain days. Leiria is close enough to be a coin toss — 6.3 °C warmer, 1 day more rain.

So: June is effectively as good as it gets here — 3 points behind July, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Lisbon

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