Castelo Mendo Weather in August
August in Castelo Mendo averages 30°C (86°F) during the day and 16°C (61°F) at night. With only 14 mm (0.6 in) of rainfall expected on average, it's a largely dry month.
Rainfall in Castelo Mendo in August
You can expect rain on roughly 5 days based on historical data, averaging 14 mm (0.6 in) for the month. The occasional light shower is possible, but rain is rarely an issue this month.
Temperature in Castelo Mendo in August
August is a good time to be in Castelo Mendo. Days are perfect, reaching 30°C (86°F), with nights around 16°C (61°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. Nights cool down to 16°C (61°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Castelo Mendo in August
The month enjoys around 329 hours of sunshine, creating mostly sunny days with good weather conditions.If you prefer enjoying temperate temperatures and rain-free days, May, June, September and October typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Portugal, check out our Castelo Mendo's climate page.
Castelo Mendo Temperature in August
Min Temperature
16°C (61°F)
Max Temperature
30°C (86°F)
Chance of Rain
17%
Precipitation
14 mm (0.6 in)
Rainy days
5 days
Humidity
55% *
Sunshine
329 hours *
Percentage Sunshine
*
Daily Historical Temperatures
46-year average (1976-2025)
Based on our historical records, temperatures in Castelo Mendo typically stay consistent throughout August, with daily highs averaging around 30°C (86°F). Nights are pleasant, with lows typically ranging from 14°C (57°F) to 17°C (63°F).
Average temperatures in August
Daily Historical Precipitation
46-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Castelo Mendo in August
Browse day-by-day weather records for Castelo Mendo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Castelo Mendo historical weather extremes in August
Our historical data for Castelo Mendo spans 1997 to 2025, revealing these weather extremes.
- The hottest August day on record in Castelo Mendo reached 38°C (100°F) (August 22, 2023).
- The lowest overnight temperature recorded in August was 6°C (43°F) (August 14, 2015).
Best Places in Portugal in August
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in August →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in Castelo Mendo in August
Warm but pleasant conditions in Castelo Mendo in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Dry conditions mean you won't need to worry about rain protection. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Castelo Mendo in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Portugal, check out our Castelo Mendo's climate page.
Temperature Rainfall Sunshine Humidity
See the full Castelo Mendo climate overview or explore weather in Portugal.
