Lisbon is at its most pleasant from mid April to mid November. For sun, aim for mid and late August; for walking, go from mid October to early June.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
The sun season here falls in mid and late August. It peaks in mid August, at 60. The weakest stretch is from November to early April, when it drops to 0, mostly because it is too cool. The clearest skies come in August, when the sky is typically 24% covered at midday (mostly clear).
For being outside, go from mid April to mid November. It peaks in early October, at 80. Avoid early and mid January for this: it falls to 10, mostly because it is too cold.
The walking season here runs from mid October to early June. It peaks in mid November, at 84. The weakest stretch is from mid July to August, when it drops to 25, mostly because it is too warm.
The year, measured
The average temperature in Lisbon over the whole year is 17°C. August is the hottest month, with highs of about 28°C; January is the coldest, with lows of about 9°C. The rainy (wet) season in Lisbon runs from October to April, peaking in March with a 57% chance of rain on a given day. The dry season is May to September; August is the driest month, at 4%. Winds in Lisbon are highest in July, averaging 4.2 m/s (15 km/h), and lightest in October, at 3.4 m/s (12 km/h). The prevailing wind is from the NW. The clearest skies in Lisbon come in August, when the sky is typically 31% covered; January is the cloudiest month, at 54%.
Month by month Lisbon climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 14°C | 9°C | 10°C | 46% | 54% | 3.6 m/s | 14 | 0 | 70 |
| February | 15°C | 10°C | 12°C | 47% | 50% | 3.7 m/s | 25 | 0 | 78 |
| March | 17°C | 11°C | 13°C | 57% | 50% | 4.1 m/s | 36 | 0 | 77 |
| April | 19°C | 13°C | 16°C | 46% | 49% | 3.9 m/s | 56 | 4 | 75 |
| May | 22°C | 16°C | 20°C | 24% | 44% | 3.9 m/s | 72 | 19 | 64 |
| June | 24°C | 17°C | 22°C | 17% | 42% | 4.1 m/s | 74 | 29 | 52 |
| July | 27°C | 19°C | 25°C | 5% | 36% | 4.2 m/s | 64 | 49 | 33 |
| August | 28°C | 20°C | 26°C | 4% | 31% | 4.0 m/s | 60 | 58 | 26 |
| September | 26°C | 18°C | 24°C | 15% | 35% | 3.8 m/s | 71 | 45 | 38 |
| October | 23°C | 16°C | 21°C | 34% | 46% | 3.4 m/s | 79 | 22 | 57 |
| November | 17°C | 13°C | 15°C | 52% | 51% | 3.4 m/s | 49 | 0 | 80 |
| December | 15°C | 10°C | 12°C | 49% | 52% | 3.4 m/s | 25 | 0 | 78 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Lisbon weather by season
Year round, Lisbon has days of about 14°C at their warmest in January, its coolest month, and 28°C in August, its warmest; the coolest hours of the day run from 9°C to 20°C through the year, and the average temperature over the year is 17°C around the clock. Rain is most likely around March and least likely around August. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Lisbon weather in winterDecember to February
Winter in Lisbon has typical daily highs of about 14°C and lows of about 10°C, with a 47% chance of rain on a given day.
Lisbon weather in springMarch to May
Spring in Lisbon has typical daily highs of about 19°C and lows of about 13°C, with a 42% chance of rain on a given day.
Lisbon weather in summerJune to August
Summer in Lisbon has typical daily highs of about 26°C and lows of about 19°C, with a 9% chance of rain on a given day.
Lisbon weather in autumnSeptember to November
Autumn in Lisbon has typical daily highs of about 22°C and lows of about 16°C, with a 34% chance of rain on a given day.
When is the rainy season in Lisbon?
The rainy (wet) season in Lisbon runs from October to April, peaking in March with a 57% chance of rain on a given day. The dry season is May to September; August is the driest month, at 4%.
What time of year is Lisbon windiest?
Winds in Lisbon are highest in July, averaging 4.2 m/s (15 km/h), and lightest in October, at 3.4 m/s (12 km/h). The prevailing wind is from the NW.
What is the average temperature in Lisbon year round?
The average temperature in Lisbon over the whole year is 17°C. August is the hottest month, with highs of about 28°C; January is the coldest, with lows of about 9°C.
Where to go instead in mid January, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.