Climate in Porto — Annual Weather Overview
Porto has a oceanic climate — mild temperatures year-round with regular rainfall. The hottest month is July (average high 24.5°C) and the coolest is January (13.3°C). There is a noticeable seasonal temperature shift of 11.2°C between July and January. Annual rainfall totals around 1360mm. December is the wettest month at 249.5mm, while July averages just 12.7mm. Average daily sunshine is 9.6 hours.
**Spring (March, April, May):** average highs 18.2°C, 279mm rain. **Summer (June, July, August):** average highs 23.3°C, 78mm rain. **Autumn (September, October, November):** average highs 20.2°C, 507mm rain. **Winter (December, January, February):** average highs 14.4°C, 497mm rain.
Porto — Monthly Temperatures
Porto — Monthly Rainfall
✅ Best months to visit
All year
ℹ️ No months to avoid
Weather in Porto stays reasonable all year.
Porto weather by month
| Month | High | Low | Rain | Sun/day | Rainy days | Rating |
|---|---|---|---|---|---|---|
| January | 13.3°C | 7.0°C | 156.7mm | 6.8h | 10 | 9/10 |
| February | 15.6°C | 8.5°C | 90.6mm | 8.1h | 9 | 10/10 |
| March | 16.3°C | 9.3°C | 102.4mm | 8.9h | 12 | 9/10 |
| April | 17.8°C | 10.7°C | 102.7mm | 10.5h | 12 | 9/10 |
| May | 20.6°C | 13.3°C | 74.1mm | 11.9h | 9 | 10/10 |
| June | 21.5°C | 15.0°C | 52.0mm | 12.9h | 8 | 10/10 |
| July | 24.5°C | 16.5°C | 12.7mm | 13.5h | 3 | 10/10 |
| August | 23.9°C | 16.3°C | 12.8mm | 12.1h | 3 | 10/10 |
| September | 23.3°C | 16.1°C | 104.2mm | 10.5h | 9 | 9/10 |
| October | 20.6°C | 14.1°C | 232.9mm | 7.8h | 15 | 8/10 |
| November | 16.8°C | 10.9°C | 169.7mm | 6.6h | 14 | 9/10 |
| December | 14.4°C | 9.3°C | 249.5mm | 5.6h | 19 | 8/10 |
For the full verdict on when to go, see the best time to visit Porto and the Porto rainy season guide. Seasonal breakdowns: spring, summer, autumn and winter.
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Frequently Asked Questions
What type of climate does Porto have?
Porto has a oceanic climate — mild temperatures year-round with regular rainfall. Average highs range from 13.3°C in January to 24.5°C in July.
What is the hottest month in Porto?
July is the hottest month in Porto, with average highs of 24.5°C and lows of 16.5°C.
What is the coldest month in Porto?
January is the coolest month, with average highs of 13.3°C and lows of 7.0°C.
What is the wettest month in Porto?
December is the wettest month, averaging 249.5mm of rainfall over around 19 rainy days.
When is rainy season in Porto?
Rainy season in Porto runs March to April and September to January, when rainfall is significantly higher than the rest of the year. Full rainy season guide →
How much rain does Porto get per year?
Porto receives around 1360mm of rain per year. The driest month is July (12.7mm).
When is the best time to visit Porto?
The best time to visit Porto is All year. See the full month-by-month guide →
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Trip essentials for Porto
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.