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Guimarães Weather in August
August in Guimarães averages 28°C (82°F) during the day and 16°C (61°F) at night. The excellent conditions and moderate rainfall make it a solid month to visit.
Rainfall in Guimarães in August
Looking at the last 30 years, the data shows about 6 days with rain, averaging 44 mm (1.7 in) for the month. Showers tend to be short but heavy rather than persistent drizzle. When it rains, it usually means it, but it doesn't last long.
Temperature in Guimarães in August
August tends to be one of the excellent months in Guimarães, with 28°C (82°F) in the afternoon and 16°C (61°F) overnight. August is part of summer. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With lows of 16°C (61°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest. On average, it is the warmest month of the year.
Sunshine in Guimarães in August
Expect a lot of sunshine this month, with about 295 hours of sun. These sunny conditions add to the overall experience.If you're a fan of comfortable temperatures and drier conditions, August is a great time to visit.
Guimarães Temperature in August
Min Temperature
16°C (61°F)
Max Temperature
28°C (82°F)
Chance of Rain
20%
Precipitation
44 mm (1.7 in)
Rainy days
6 days
Humidity
73% *
Sunshine
295 hours *
Percentage Sunshine
73% *
* Data from: Porto, Portugal (39 KM, 24 Miles).
Guimarães Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Guimarães - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Guimarães typically stay consistent throughout August, with daily highs averaging around 28°C (82°F). Nights are pleasant, with lows around 15°C (59°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather records for Guimarães in August
Browse day-by-day weather records for Guimarães spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Guimarães historical weather extremes in August
Based on 50 years of weather observations in Guimarães between 1976 and 2026, these are the recorded extremes.
- Guimarães recorded its highest August temperature of 37°C (99°F) on August 7, 2016.
- On August 16, 2006, Guimarães saw its coldest August day with temperatures maxing out at 18°C (64°F).
- Nighttime temperatures dropped to 7°C (45°F) on August 26, 1985, marking the coldest August night on record.
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
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Guimarães in August
Warm weather calls for comfortable, breathable clothing in August. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Rain is likely on several days, so bring a good rain jacket. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
What To Do in Guimarães in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming10/10 -
Cycling8/10 -
Walking8/10 -
Barbeque10/10 -
Camping10/10 -
Outdoor sports8/10
Guimarães 3-Day Forecast
More climate data for Guimarães
Temperature Rainfall Sunshine Humidity
See the full Guimarães climate overview or explore weather in Portugal.
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Where to go in August - average daytime high across popular destinations.
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