Weather in Leiria in June

Prime time. June is about as good as Leiria gets. Highs average 27.3 °C, lows 14.8 °C, and rain falls on 4 days — nothing in the month is working against you.

June is the highest-scoring month of the twelve. The nearest rival is May, and the month at the other end of the year is January.

Rain falls on only 4 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: 8 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest June day reached 38.7 °C and the coldest night fell to 9.5 °C.

This is the volatile part. June rainfall has ranged from 1 mm to 48 mm across the twenty years measured — a 47 mm spread around an average of 18 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 is light at 8.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 69%.

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 Leiria's year: 15 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 18.3 °C in June — swimmable, but it takes a moment to commit. The sea peaks at 19.9 °C in August and bottoms out at 14.3 °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, April is the trade worth considering — 11 points weaker on weather, and materially quieter.

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

June in Leiria versus nearby

If Leiria is one option among several, the nearby comparison is worth making. Aveiro is close enough to be a coin toss — 3.4 °C cooler, the same number of rain days. Lisbon is close enough to be a coin toss — 6.3 °C cooler, 1 day less rain.

So: June is the answer for Leiria. If it is booked out or priced out, May is the next best thing at 6 points behind, and January is the month to keep off the shortlist.

Every month in Leiria

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