São Martinho do Porto Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit São Martinho do Porto.
Climate overview of São Martinho do Porto
São Martinho do Porto, Centro Region, Portugal, experiences moderate temperature changes through the seasons. August is the warmest month with daytime highs of 25°C (77°F), while January is the coolest at 15°C (59°F).
São Martinho do Porto sees a moderate amount of rainfall, totalling around 693 mm (27 in) per year. It experiences a distinct dry season from June to September, with warm summers and mild winters, creating some seasonal variation. The sunniest month is August, with 8.5 hours of sunshine per day on average.
São Martinho do Porto Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in São Martinho do Porto - and find the best time to visit.
Monthly Temperature in São Martinho do Porto
The climate in São Martinho do Porto experiences moderate temperature changes, with mild shifts between seasons. Average maximum daytime temperatures range from a comfortable 25°C (77°F) in August, the warmest time of the year, to a moderate 15°C (59°F) during cooler months like January.
At night, you can expect temperatures ranging from 18°C (64°F) in August to around 9°C (48°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in São Martinho do Porto
Generally, São Martinho do Porto has a moderate amount of precipitation, averaging 693 mm (27 in) of rainfall annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, November it receives moderate rainfall, averaging 96 mm (3.8 in) of precipitation, recorded across 14 rainy days. In contrast, the driest month July brings less rainfall, with 9.6 mm (0.4 in) over 4 rainy days. For more details, please visit our São Martinho do Porto Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in São Martinho do Porto
Seasonal changes in sunshine hours are quite dramatic in São Martinho do Porto. While August receives considerable daily sunshine with up to 8.5 hours, February marks the darkest time of the year, where sunshine is scarce with only 4.1 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in São Martinho do Porto by Month
The city experiences its highest humidity in August, reaching 89%. In March, the humidity drops to its lowest level at 80%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit São Martinho do Porto
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June, July, August, September and October
- Warmest weather: July, August and September
- Most sunshine: July and August
- Fewest rainy days: July and August
- Seasonal pattern: A distinct dry season from June to September, with warm summers and mild winters
Frequently asked questions about the climate in São Martinho do Porto
What is the best time to visit São Martinho do Porto?
May, June, July, August, September and October typically offer the most optimal weather in São Martinho do Porto. In contrast, January, February and December tend to have less optimal conditions. São Martinho do Porto has a distinct dry season from June to September, with warm summers and mild winters.
What temperatures can I expect in São Martinho do Porto?
Daytime highs range from 15°C (59°F) in January to 25°C (77°F) in August. Nighttime lows range from 9°C (48°F) to 18°C (64°F).
How much rain does São Martinho do Porto get?
Annual rainfall is around 693 mm (27 in). November is the wettest month with 96 mm (3.8 in), while July is the driest with 9.6 mm (0.4 in).
How sunny is São Martinho do Porto?
São Martinho do Porto receives around 2,206 hours of sunshine per year. August is the sunniest month with 255 hours, while February is the cloudiest with just 122 hours. Overall, São Martinho do Porto enjoys abundant sunshine.
São Martinho do Porto 3-Day Forecast
São Martinho do Porto 3-Day Forecast
São Martinho do Porto on the map
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