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Climate · Porto

Porto in May

Warm and damp, as the days lengthen.

Typical weather, averaged over 30 years

May in Porto is warm: highs near 71°F, lows near 54°F. Rain falls on about three days a week, and the days lengthen by 53 minutes from the first week to the last.May in Porto is warm: highs near 22°C, lows near 12°C. Rain falls on about three days a week, and the days lengthen by 53 minutes from the first week to the last.

High
71°F22°Caverage
Low
54°F12°Caverage
Wet days
3a week · 37% of days
Daylight
14h 29mon average

Is May a good time to visit Porto?

A good month, just outside Porto's best months, which run from June to September.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How May sits in the year

week by week

Temperature

Highs near 71°F in May, against 58°F to 82°F through the year.Highs near 22°C in May, against 14°C to 28°C through the year.

Chance of a wet day

37% of days in May, against 13% to 45% through the year.

Cloud cover

52% cover in May, against 25% to 62% through the year.

Daylight

14h 29m in May, against 9h 15m to 15h 05m through the year.

Week by week, lightly smoothed, with May shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. April67°19°low 50°low 10°3 wet days a weekRain on about three days a week.
  2. May71°22°low 54°low 12°3 wet days a weekRain on about three days a week.
  3. June77°25°low 59°low 15°2 wet days a weekRain on about two days a week.

Where Porto sits, in May

Europe/Lisbon
this place
typical high in May 40°F4°C95°F35°C
Sunrise, mid-May
6:17 AMsets 8:44 PM
Above the sea
90 mlow-lying
Latitude
41.2°Nnorthern hemisphere
Nearest of ours
Valença do Douro88 km east

The land around Porto, shaded by its typical high in May, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in Portugal in May

high · low · wet days
See May on the planning mapThe whole year in Porto

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Porto. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.