Guimarães Weather in September
September in Guimarães brings high temperatures, with daytime highs of 25°C (77°F) and nights around 14°C (57°F). Quite a bit of rainfall is expected, around 87 mm (3.4 in), so pack an umbrella.
Rainfall in Guimarães in September
Typically, about 9 days will experience rainfall, with an average of 87 mm (3.4 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Guimarães in September
September is a perfect month in Guimarães, with 25°C (77°F) during the day and 14°C (57°F) at night. During September, you'll experience the summer season. Overall, the month follows a fairly predictable daily temperature pattern. At 14°C (57°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Guimarães in September
With approximately 224 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July, August and September typically offer the best weather for Guimarães.
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 Guimarães's climate page.
Guimarães Temperature in September
Min Temperature
14°C (57°F)
Max Temperature
25°C (77°F)
Chance of Rain
30%
Precipitation
87 mm (3.4 in)
Rainy days
9 days
Humidity
76% *
Sunshine
224 hours *
Percentage Sunshine
64% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Guimarães typically stay consistent throughout September, with daily highs averaging around 25°C (77°F). Nights are pleasant, with lows typically ranging from 13°C (55°F) to 15°C (59°F).
Average temperatures in September
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 September
Historical weather for Guimarães in September
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 September
Our historical data for Guimarães spans 1976 to 2025, revealing these weather extremes.
- Guimarães recorded its highest September temperature of 36°C (97°F) on September 12, 1978.
- The coldest September day was on September 19, 2000, with a maximum of 16°C (61°F).
- Guimarães registered its coldest September night on September 22, 1994, with temperatures dropping to 7°C (45°F).
Best Places in Portugal in September
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in September →
perfect weather
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tolerable
unpleasant
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What to Wear in Guimarães in September
Warm but pleasant conditions in Guimarães in September. 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. Expect heavy rainfall, so bring good rain protection and waterproof bags. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Guimarães in September
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 Guimarães's climate page.
Temperature Rainfall Sunshine Humidity
See the full Guimarães climate overview or explore weather in Portugal.
