Rio Maior Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Rio Maior.
Climate overview of Rio Maior
The climate in Rio Maior, Portugal, is marked by large temperature swings across the seasons, ranging from 28°C (82°F) in August to 15°C (59°F) in January.
Rio Maior sees a moderate amount of rainfall, totalling around 662 mm (26 in) per year. It experiences a distinct dry season from June to September, with warm summers and mild winters, creating some seasonal variation. Sunshine peaks in August, when the city sees around 8.5 hours of sunshine per day.
Rio Maior Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Rio Maior - and find the best time to visit.
Monthly Temperature in Rio Maior
In Rio Maior, temperatures differ significantly between summer and winter months. Average maximum daytime temperatures range from a comfortable 28°C (82°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 17°C (63°F) in August to around 7°C (45°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Rio Maior
On average, Rio Maior receives a reasonable amount of rainfall, with an annual precipitation of 662 mm (26 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, November it receives moderate rainfall, averaging 89 mm (3.5 in) of precipitation, recorded across 14 rainy days. In contrast, the driest month July brings less rainfall, with 6.8 mm (0.3 in) over 3 rainy days. For more details, please visit our Rio Maior 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 Rio Maior
Seasonal changes in sunshine hours are quite dramatic in Rio Maior. 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 Rio Maior 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 Rio Maior
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April, May, June, July, August, September and October
- Warmest weather: July and August
- 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 Rio Maior
What is the best time to visit Rio Maior?
April, May, June, July, August, September and October typically offer the most optimal weather in Rio Maior. In contrast, January, February and December tend to have less optimal conditions. Rio Maior has a distinct dry season from June to September, with warm summers and mild winters.
What temperatures can I expect in Rio Maior?
Daytime highs range from 15°C (59°F) in January to 28°C (82°F) in August. Nighttime lows range from 7°C (45°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Rio Maior get?
Annual rainfall is around 662 mm (26 in). November is the wettest month with 89 mm (3.5 in), while July is the driest with 6.8 mm (0.3 in).
How sunny is Rio Maior?
Rio Maior 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, Rio Maior enjoys abundant sunshine.
Rio Maior 3-Day Forecast
Rio Maior 3-Day Forecast
Rio Maior on the map
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