Weather in Lisbon in September 2024
Average weather
Average temperature in Lisbon in September
The expected average maximum temperature in September is +77°F with a maximum of +86°F and a minimum of +59°F.
The average maximum temperature goes down 33% by the end of the month, compared with the beginning of the month, from +81°F to +72°F.
Is Lisbon warm or cold in September?
Lisbon is typically warm in September.
Maximum temperatures go down compared to the previous month from +81°F to +77°F. The minimum temperature also goes down from +64°F to +64°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
September is one of the warmest months in Lisbon, here is the comparison with other months:
Climate in Lisbon in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +81°F | +77°F | +72°F | ||||
| Min. temperature | ||||||
| +59°F | +55°F | +48°F | ||||
| Max. temperature | ||||||
| +106°F | +102°F | +93°F | ||||
| Rainfall | ||||||
| 3 mm | 30 mm | 83 mm | ||||
| Wind | ||||||
| 4 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 65% | 67% | 73% | ||||
| Air pressure | ||||||
| 1015 HPa | 1016 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 23 | 19 | 15 | ||||
| Cloudy days | ||||||
| 8 | 9 | 10 | ||||
| Rainy days | ||||||
| 0 | 2 | 6 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as great as in August. It’s getting colder in September. From +81°F in the day, the average maximum temperature lowers to +77°F. Prepare for more rain. Average rainfall goes from 3 mm to 30 mm. Humidity rises from 65% to 67%. Winds are calmer in comparison to August, going down from 4 m/s to 3 m/s on average. The days becoming less sunny, going from 23 sunny days in August to 19 in September.
Next month (October) brings a further decline in the weather.
Wind
The average wind speed is 6 m/s getting up to 11 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Lisbon is gradually increasing during September, going from 6 m/s to 7 m/s over the course of the month.
Rain
How was the weather last September in Lisbon?
Climate Change Over the Years
The climate in Lisbon in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1993 (+75°F) and the highest in 2018 (+87°F). The driest year was 2017 with only 0 mm of rainfall, and the wettest year was 1983 with 0 mm.
FAQ
Is September a good time to visit Lisbon?
Can you sunbathe in Lisbon in September?
Is Lisbon rainy in September?
Is it sunny in Lisbon in September?
Other cities in Portugal
Monthly weather in Lisbon
Source of the data
For this page, we’ve looked at the typical weather in Lisbon, based on historical hourly weather data from January 1, 1979, to December 31, 2022.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.