Lisbon Weather in September
September in Lisbon sees daytime temperatures around 25°C (77°F) and lows of 17°C (63°F) at night. The perfect weather makes it a good time to visit.
Rainfall in Lisbon in September
Historically, approximately 6 days this month are expected to have rain, averaging 32 mm (1.3 in). The odd shower may pass through, but it usually doesn't amount to much. A largely dry month overall.
Temperature in Lisbon in September
Weather in Lisbon is at its perfect in September. Highs reach 25°C (77°F), while nights settle around 17°C (63°F). During September, you'll experience the summer season. This kind of day-to-night contrast is typical for this time of year. With overnight lows of 17°C (63°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Lisbon in September
With approximately 280 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.So this is a great month to visit if you prefer dry days with pleasant temperatures.
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 Lisbon's climate page.
Lisbon Temperature in September
Min Temperature
17°C (63°F)
Max Temperature
25°C (77°F)
Chance of Rain
19%
Precipitation
32 mm (1.3 in)
Rainy days
6 days
Sunshine
280 hours
Percentage Sunshine
75%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Lisbon typically stay consistent throughout September, with daily highs averaging around 25°C (77°F). Nights are pleasant, with lows around 17°C (63°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 Lisbon in September
Browse day-by-day weather records for Lisbon spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Lisbon historical weather extremes in September
Our historical data for Lisbon spans 1976 to 2025, revealing these weather extremes.
- The warmest day in September was on September 5, 2016, with a maximum of 39°C (102°F).
- The lowest daytime temperature in September was 18°C (64°F), recorded on September 26, 1992.
- The coldest night in September in Lisbon was on September 23, 1979, with a minimum of 11°C (52°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 →
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What to Wear in Lisbon in September
Warm but pleasant conditions in Lisbon 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. Light rain is possible, so consider bringing a small umbrella or rain jacket. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Lisbon 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 Lisbon's climate page.
See the full Lisbon climate overview or explore weather in Portugal.
