The most comfortable time to visit Porto is from May to October. For walking, any time of year works. Sunbathing weather is not what it offers.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
Sun is not what Porto is for: the Sunbathing rating tops out at 29, mostly because it is too cool. The clearest skies come in July, when the sky is typically 41% covered at midday (partly cloudy).
The being outside season here runs from May to October. It peaks in early September, at 89. The weakest stretch is in January, when it drops to 10, mostly because it is too cold.
For walking, Porto rates Good or better all year. It is at its best in late April, at 85.
The year, measured
The average temperature in Porto over the whole year is 15°C. August is the hottest month, with highs of about 23°C; January is the coldest, with lows of about 7°C. The rainy (wet) season in Porto runs from October to April, peaking in January with a 39% chance of rain on a given day. The dry season is May to September; August is the driest month, at 8%. Winds in Porto are highest in March, averaging 3.2 m/s (12 km/h), and lightest in September, at 2.5 m/s (9 km/h). The prevailing wind is from the W. The clearest skies in Porto come in July, when the sky is typically 49% covered; December is the cloudiest month, at 58%.
Month by month Porto climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 13°C | 7°C | 10°C | 39% | 57% | 3.0 m/s | 13 | 0 | 72 |
| February | 15°C | 8°C | 12°C | 32% | 58% | 2.9 m/s | 28 | 0 | 79 |
| March | 15°C | 9°C | 12°C | 37% | 58% | 3.2 m/s | 28 | 0 | 77 |
| April | 18°C | 11°C | 14°C | 30% | 55% | 3.0 m/s | 48 | 2 | 80 |
| May | 19°C | 14°C | 18°C | 18% | 53% | 3.0 m/s | 71 | 8 | 79 |
| June | 21°C | 15°C | 19°C | 13% | 54% | 2.9 m/s | 81 | 12 | 74 |
| July | 23°C | 17°C | 22°C | 10% | 49% | 2.9 m/s | 80 | 20 | 61 |
| August | 23°C | 16°C | 22°C | 8% | 52% | 2.7 m/s | 84 | 24 | 59 |
| September | 22°C | 15°C | 22°C | 18% | 50% | 2.5 m/s | 85 | 23 | 61 |
| October | 20°C | 14°C | 19°C | 34% | 55% | 2.7 m/s | 79 | 10 | 72 |
| November | 16°C | 10°C | 14°C | 36% | 57% | 2.8 m/s | 44 | 0 | 81 |
| December | 14°C | 9°C | 12°C | 39% | 58% | 3.1 m/s | 23 | 0 | 76 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Porto weather by season
Year round, Porto has days of about 13°C at their warmest in January, its coolest month, and 23°C in August, its warmest; the coolest hours of the day run from 7°C to 17°C through the year, and the average temperature over the year is 15°C around the clock. Rain is most likely around January and least likely around August. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Porto weather in winterDecember to February
Winter in Porto has typical daily highs of about 14°C and lows of about 8°C, with a 37% chance of rain on a given day.
Porto weather in springMarch to May
Spring in Porto has typical daily highs of about 18°C and lows of about 11°C, with a 29% chance of rain on a given day.
Porto weather in summerJune to August
Summer in Porto has typical daily highs of about 22°C and lows of about 16°C, with a 10% chance of rain on a given day.
Porto weather in autumnSeptember to November
Autumn in Porto has typical daily highs of about 19°C and lows of about 13°C, with a 29% chance of rain on a given day.
When is the rainy season in Porto?
The rainy (wet) season in Porto runs from October to April, peaking in January with a 39% chance of rain on a given day. The dry season is May to September; August is the driest month, at 8%.
What time of year is Porto windiest?
Winds in Porto are highest in March, averaging 3.2 m/s (12 km/h), and lightest in September, at 2.5 m/s (9 km/h). The prevailing wind is from the W.
What is the average temperature in Porto year round?
The average temperature in Porto over the whole year is 15°C. August is the hottest month, with highs of about 23°C; January is the coldest, with lows of about 7°C.
Where to go instead in mid January, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.