Alter do Chão Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Alter do Chão.
Climate overview of Alter do Chão
Alter do Chão, Alentejo, Portugal, sees big temperature differences between seasons, with July peaking at 33°C (91°F) and January dropping to 14°C (57°F).
Annual rainfall is moderate at around 615 mm (24 in), with October being the wettest month. The city also has a distinct dry season from June to September, with very warm summers and mild winters.
Alter do Chão Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Alter do Chão - and find the best time to visit.
Monthly Temperature in Alter do Chão
Visitors to Alter do Chão can expect significant temperature changes throughout the year. Average daytime temperatures reach a very warm 33°C (91°F) in July. In January, the coolest month of the year, temperatures drop to a moderate 14°C (57°F).
At night, temperatures range from around 18°C (64°F) in July to 6°C (43°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Alter do Chão
Generally, Alter do Chão experiences moderate precipitation patterns, averaging 615 mm (24 in) yearly. Alter do Chão can be quite wet during October, receiving approximately 84 mm (3.3 in) of precipitation over 11 rainy days.
In contrast, during the driest month (July), you will experience much drier conditions, with 4.3 mm (0.2 in) of precipitation spread across 3 rainy days. For more details, please visit our Alter do Chão Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Alter do Chão
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, September and October
- Warmest weather: July and August
- Fewest rainy days: July and August
- Seasonal pattern: A distinct dry season from June to September, with very warm summers and mild winters
Frequently asked questions about the climate in Alter do Chão
What is the best time to visit Alter do Chão?
April, May, September and October typically offer the most optimal weather in Alter do Chão. In contrast, January, February, July, August and December tend to have less optimal conditions. Alter do Chão has a distinct dry season from June to September, with very warm summers and mild winters.
What temperatures can I expect in Alter do Chão?
Daytime highs range from 14°C (57°F) in January to 33°C (91°F) in July. Nighttime lows range from 6°C (43°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Alter do Chão get?
Annual rainfall is around 615 mm (24 in). October is the wettest month with 84 mm (3.3 in), while July is the driest with 4.3 mm (0.2 in).
Alter do Chão 3-Day Forecast
Alter do Chão on the map
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