worldweatherAutumn weather 2026 in Portugal
Parts of the country still have frequent hot days in early autumn. Compare months and cities to choose warmer or milder conditions and check precipitation.
September, October and November can feel very different. Comparing the months helps you choose a time for sightseeing, a short break or a later holiday.
Weather month by month
Compare average temperatures, precipitation totals and precipitation days in previous years.
Lisbon
- Total precipitation
- 23 mm
- Days with >=1 mm precipitation
- 4.2 days
- Days with a minimum below 0°C
- 0 days
- Total precipitation
- 64 mm
- Days with >=1 mm precipitation
- 9.2 days
- Days with a minimum below 0°C
- 0 days
- Total precipitation
- 83 mm
- Days with >=1 mm precipitation
- 12.4 days
- Days with a minimum below 0°C
- 0 days
Temperatures are average daily highs and lows. Precipitation totals and day counts refer to an average full month.
Compare cities and regions
The table compares seasonal averages for five cities and regions over the selected historical period. Select a city to see its forecast.
How did previous seasons differ?
Each point shows the average daily high for one complete season. The chart lets you compare warmer and cooler years.
Current city forecasts
Choose a city to see the full forecast for available dates.
Compare the other season
Questions before you travel
What does the seasonal comparison show?
The comparison shows temperatures, precipitation and the number of days with selected conditions in previous years. It helps you compare destinations and travel months. City pages provide the current forecast for available dates.
Which months make up autumn 2026?
We compare September, October and November 2026. This three-month meteorological definition lets us compare the same periods year by year.
How are precipitation days counted?
We count days with a daily precipitation total of at least 1 mm. The figure on each card is the average number of these days per month or season over the selected historical period.
How should I choose a city and month?
Compare daytime temperatures, daily lows and precipitation days. Consider the time of day you plan to walk or go sightseeing. Check the current forecast before travelling.
Sources and comparison method
We use daily NASA POWER data for the coordinates of the selected cities and regions. Calculations cover complete months and seasons from 1981-2025. Autumn comprises September, October and November; winter combines December with January and February of the following year.
"Daytime high" is the average of daily maximum temperatures; the minimum is the average of daily lows. A precipitation day has a daily total of at least 1 mm. We show average precipitation totals and counts of these days per month or season. Each country comparison covers five selected cities and regions.
NASA POWER Daily API