Monthly climate guide
Porto weather in May
Expect mild weather in Porto in May: afternoons reach about 20°C (68°F), while nights drop to around 13°C (55°F). Around 72 mm of rain falls over the month (some rain), and skies are a mix of sun and cloud. Daytime highs are 3°C warmer than April and 2°C cooler than June.
What stands out in May
- Just 110 km apart, but Porto runs about 3°C cooler than Coimbra this month.
- Seasonally, May counts as late spring in Porto.
- Comfortable temperatures make it easy to walk between Ribeira District and Livraria Lello.
Avg high
20°C
68°F
Avg low
13°C
55°F
Rainfall
72 mm
some rain
Humidity
79%
relative
Sky
43%
cloud · a mix of sun and cloud
Porto weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 13°C / 56°F | 8°C / 47°F | 130 mm | 86% | 54% |
| February | 14°C / 56°F | 8°C / 46°F | 100 mm | 83% | 51% |
| March | 15°C / 60°F | 9°C / 48°F | 108 mm | 81% | 49% |
| April | 17°C / 63°F | 11°C / 52°F | 102 mm | 81% | 52% |
| May | 20°C / 68°F | 13°C / 55°F | 72 mm | 79% | 43% |
| June | 22°C / 71°F | 15°C / 58°F | 29 mm | 76% | 41% |
| July | 24°C / 76°F | 16°C / 61°F | 9 mm | 74% | 28% |
| August | 25°C / 76°F | 16°C / 61°F | 19 mm | 73% | 30% |
| September | 24°C / 75°F | 16°C / 61°F | 52 mm | 73% | 34% |
| October | 21°C / 70°F | 14°C / 58°F | 118 mm | 77% | 46% |
| November | 16°C / 61°F | 11°C / 52°F | 145 mm | 84% | 53% |
| December | 14°C / 58°F | 9°C / 49°F | 114 mm | 85% | 54% |
What to pack for May
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is May a good time to visit Porto?
Our Porto guide recommends: May to June or September, for mild weather without peak summer crowds.
Cross the river to Vila Nova de Gaia for port wine cellar tours — most of the historic producers are based there, not in Porto itself.
Best time to visit Porto →Other Portugal cities in May
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Porto weather in May. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/portugal/porto/may
<a href="https://weathercompare.eu/weather/portugal/porto/may">Porto weather in May</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/portugal/porto" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Porto weather in May"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/portugal/porto/may">Porto weather in May</a> – WeatherCompare</p>
Porto in May: quick answers
Is May a good time to visit Porto?
May is a reasonable time for Porto: highs around 20°C and about 72 mm of rain, though not one of the three best months.
How warm is Porto in May?
Average highs are about 20°C (68°F) and average lows about 13°C (55°F), based on 10 years of daily data.
Does it rain a lot in Porto in May?
Porto typically gets around 72 mm of rain in May — some rain.
When is the best time to visit Porto?
May to June or September, for mild weather without peak summer crowds.
Figures are long-term averages for the area around Porto (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.