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Lisbon in September: Weather, Average temperature and Climate

Planning a trip and want to know what the weather in Lisbon in September will be like? Take a look at our weather guide for Lisbon, based on historical data.
Check flight prices to Lisbon on Avionero:
September

Weather in Lisbon in September 2024

Great Weather
Warm
☀️
Sunny
✈️
$698 - $1,023
If you're looking for a destination with great weather in September, look no more – Lisbon is a perfect choice. Expect average maximum temperatures of +77°F and plenty of sunshine, with around 19 sunny days. Just keep in mind that there may be some rainfall, with approximately 30 mm of precipitation over an average of 2 rainy days. So, pack your sunglasses, a beach towel, and great walking shoes, as it's most likely going to be amazing weather. Search flights in one click on Avionero.

Average weather

☀️
+77°F
Avg. max. temperature
+55°F
Min.
+102°F
Max.
30 mm
Total precipitation
67%
Avg. humidity
3 m/s
Avg. wind
19 ☀️
Sunny Days
9 ⛅️
Cloudy
2 🌦
Rainy
Our opinion: Lisbon has great weather in September.

Average temperature in Lisbon in September

Here are the expected maximum, average and minimum temperatures in Lisbon for September based on the historical data.
Last Year
Historical Data

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 up 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:

Travel to Lisbon

Click to see more details
✈️
64
Flights per week
$698
Min. Price
$1,023
Max. Price

Climate in Lisbon in September

Lisbon weather looks like this, on average, in September and the surrounding months.
AugustSeptemberOctober
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 mm30 mm83 mm
Wind
4 m/s3 m/s3 m/s
Humidity
65%67%73%
Air pressure
1015 HPa1016 HPa1015 HPa
Sunny days
231915
Cloudy days
8910
Rainy days
026
Snowy days
000

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

Wind speed in Lisbon in September based on historical data.
Last Year
Historical Data

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

Amount of rainfall in mm during September in Lisbon based on historical data.
Last Year
Historical Data
Typically, there is a 23% chance of rain on an average day in September, with total rainfall of approximately 256 mm. The maximum amount of rainfall per day is around 116 mm, which is considered heavy rain. On average, there are about 7 rainy days during September, so prepare to bring an umbrella.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Lisbon wettest month is December, where a typical day has a 23% chance of precipitation and 121 mm of rainfall per day. July, on the other hand, is the driest month with a mere 0% chance of precipitation and 2 mm of rainfall per day.

How was the weather last September in Lisbon?

This is the weather in Lisbon in September 2023:
1 September
☀️
+80°F
2 September
☀️
+77°F
3 September
☀️
+76°F
4 September
☀️
+75°F
5 September
☁️
+76°F
6 September
☀️
+78°F
7 September
☀️
+76°F
8 September
☁️
+78°F
9 September
☀️
+81°F
10 September
☀️
+83°F
11 September
☀️
+78°F
12 September
🌧️
+71°F
13 September
🌧️
+73°F
14 September
🌧️
+74°F
15 September
☀️
+75°F
16 September
☁️
+78°F
17 September
☀️
+85°F
18 September
☀️
+84°F
19 September
☀️
+84°F
20 September
☀️
+85°F
21 September
☀️
+80°F
22 September
☀️
+82°F
23 September
☀️
+77°F
24 September
☀️
+72°F
25 September
☀️
+71°F
26 September
☀️
+76°F
27 September
☀️
+73°F
28 September
☁️
+70°F
29 September
☀️
+68°F
30 September
☀️
+71°F
In September 2023 Lisbon had 23 sunny days, 4 cloudy days, and 3 rainy days. The average maximum temperature was +77°F, with an absolute maximum of +86°F and a minimum of +68°F. The average humidity was 73%, with a maximum of 94% and a minimum of 25%. The average wind speed was 6 m/s, with a maximum of 21 m/s and a minimum of 0 m/s.
Are you planning a trip in September?

Climate Change Over the Years

This is how Lisbon climate has changed over the last 43 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

Frequently asked questions about the weather in Lisbon in September:

Is September a good time to visit Lisbon?

Yes, September is a great time to go to Lisbon, the weather couldn’t be better. Be ready to get outside, explore and enjoy. Check what other months that are a good time to visit Lisbon.

Can you sunbathe in Lisbon in September?

September is warm in Lisbon. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Is Lisbon rainy in September?

Lisbon is usually dry in September. Plan your packing around outdoor activities and exploring.

Is it sunny in Lisbon in September?

The amount of sunny days in Lisbon during September varies; prepare for a mix of clouds and sun.

How much does it cost to fly to Lisbon in September?

The normal prices to fly to Lisbon is $698 - $1,023. It means that the majority of our users have picked flights in this range. To find the best price we recommend you search early, using our flexible dates feature.

Other cities in Portugal

Check out the weather for 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.