Log visit
Portugal
Lisbon weather by month
Historical averages 2016–2025 · not a forecast
Loading your weather period…
When is the best time to visit Lisbon?
For a warm holiday, the best week has been 16–22 August (Weather Index 95). Favourable start dates for a 7-day trip run from 5 July to 26 August. August is warmest (25°C), August is driest and June and July have the most sun.
- Warmest
- August 25°C
- Coolest
- January, February and December 15°C
- Driest
- August 1% rain-day chance
- Wettest
- March and April 34% rain-day chance
- Sunniest
- June and July 14 hours a day
A rain day has 1 mm or more, snow included, so a short shower counts. Monthly averages below give the amounts.
Monthly averages in Lisbon
Lisbon historical monthly estimates, 2016–2025. Temperatures and sunshine are daily averages.
| Month | High (°C) | Low (°C) | Rain-day chance (%) | Expected rain days | Precipitation (mm/month) | Sunshine (hours/day) |
|---|---|---|---|---|---|---|
| January | 14.5 | 10.2 | 25.8 | 8.0 | 56.6 | 7.8 |
| February | 15.4 | 10.7 | 24.3 | 6.8 | 48.5 | 8.6 |
| March | 16.0 | 11.3 | 33.5 | 10.4 | 74.5 | 10.1 |
| April | 17.8 | 12.8 | 34.0 | 10.2 | 58.5 | 11.5 |
| May | 20.2 | 14.7 | 14.5 | 4.5 | 35.0 | 12.8 |
| June | 22.0 | 16.5 | 9.7 | 2.9 | 9.7 | 13.6 |
| July | 24.0 | 17.7 | 1.9 | 0.6 | 2.1 | 13.5 |
| August | 24.6 | 18.0 | 1.0 | 0.3 | 0.8 | 12.6 |
| September | 23.4 | 17.5 | 9.7 | 2.9 | 23.9 | 11.3 |
| October | 21.4 | 16.3 | 25.5 | 7.9 | 58.5 | 9.3 |
| November | 17.4 | 13.3 | 33.0 | 9.9 | 80.8 | 7.8 |
| December | 15.4 | 11.3 | 27.4 | 8.5 | 74.5 | 7.6 |
Each month averages its own days. Precipitation includes snow. About the data
Sources
Open-Meteo · 1 Jan 2016 – 31 Dec 2025
- Open-Meteo Historical Weather API
- Local days, 2016–2025, every year weighted equally. Each weekly chart averages its own seven days, without smoothing.
- Shading shows the 10th–90th percentile of past days, not forecast confidence.
- A rain day has at least 1 mm, snow included. The last weekly period has eight days.
- Wind is the average daytime (10:00–18:00) maximum, not gusts. Daylight is calculated from latitude. Missing readings stay blank.
- Mugginess (dew point) comes from the original daily summaries, on UTC days.
- The live two-week forecast comes from the Open-Meteo Weather Forecast API. The Weather Index does not use it.