June weather forecast
Porto, Portugal

June marks the official onset of summer in Porto. There is a noticeable leap in average temperatures from the mild conditions in May. The amount of rainfall drops to a yearly low of 40mm (1.57"), indicating the arrival of the dry season. In addition, the longest daylight hours of the year occur in June, adding to the vibrant summer atmosphere. Sunbathers fill the city's beaches, taking advantage of the sunny, dry days.

Temperature

Porto's weather in June shows a minor rise in the average high-temperature, moving slightly up from May's pleasant 20.1°C (68.2°F) to a warm 23.5°C (74.3°F). In June, Porto experiences an average nighttime temperature of 14.5°C (58.1°F).

Rainfall

In Porto, Portugal, in June, during 9 rainfall days, 40mm (1.57") of precipitation is typically accumulated. Throughout the year, there are 147 rainfall days, and 1237mm (48.7") of precipitation is accumulated.

Sea temperature

In Porto, in June, the average water temperature is 17.3°C (63.1°F).
Note: Swimming is not a pleasurable activity for most people when the water temperature is 17.3°C (63.1°F). Breathing control gets harder as the water temperature drops from 21°C (69.8°F) to 15°C (59°F).

Daylight

June has the longest days of the year, with an average of 15h and 6min of daylight.
On the first day of June, sunrise is at 06:03 and sunset at 21:01. On the last day of the month, sunrise is at 06:05 and sunset at 21:11 WEST.

Sunshine

In June, the average sunshine in Porto is 9.1h.

UV index

June through August, with an average maximum UV index of 8, are months with the highest UV index. A UV Index reading of 8 to 10 represents a very high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The daily high UV index of 8 in June translates into this advice:
Be proactive in protecting yourself; skin and eyes can be harmed if left unprotected. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.