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Climate · Lisbon

Lisbon in September

Warm and mostly dry, as the days shorten.

Typical weather, averaged over 30 years

September in Lisbon is warm: highs near 80°F, lows near 65°F. Rain falls on about one day a week, more often as the month goes on, and the days shorten by 54 minutes from the first week to the last.September in Lisbon is warm: highs near 27°C, lows near 18°C. Rain falls on about one day a week, more often as the month goes on, and the days shorten by 54 minutes from the first week to the last.

High
80°F27°Caverage
Low
65°F18°Caverage
Wet days
1a week · 15% of days
Daylight
12h 21mon average

Is September a good time to visit Lisbon?

Yes. September is one of Lisbon's best months (May to July, or September).

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How September sits in the year

week by week

Temperature

Highs near 80°F in September, against 60°F to 83°F through the year.Highs near 27°C in September, against 16°C to 28°C through the year.

Chance of a wet day

15% of days in September, against 4% to 35% through the year.

Cloud cover

33% cover in September, against 14% to 54% through the year.

Daylight

12h 21m in September, against 9h 30m to 14h 50m through the year.

Week by week, lightly smoothed, with September shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. August83°28°low 66°low 19°no wet daysRain on fewer than one day a week.
  2. September80°27°low 65°low 18°1 wet day a weekRain on about one day a week.
  3. October76°24°low 62°low 17°2 wet days a weekRain on about two days a week.

Where Lisbon sits, in September

Europe/Lisbon
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
7:17 AMsets 7:47 PM
Above the sea
0 mlow-lying
Latitude
38.7°Nnorthern hemisphere
Nearest of ours
Melides72 km south-east

The land around Lisbon, shaded by its typical high in September, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in Portugal in September

high · low · wet days
See September on the planning mapThe whole year in Lisbon

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Lisbon. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.