Cool in Jan
16°C average high
avg high · 7° at night
25°C+ on rarely
Portugal
Lisbon weather in January
Is it warm? No. January in Lisbon is cold: afternoons average 14°C and nights 9°C. Most days (80%) peak between 12°C and 17°C.
Cold · average high
14°C
25°C or more on almost no days; 20°C or more on almost no days.
- Average low9°overnight
- Sea16°average, 2023–2025
- Rainy days764 mm in the month
- SkyOften cloudy52% cloud · 31% clear days
How warm it really gets
Every January afternoon from 2011–2025: 465 days. Most (80%) peaked between 12° and 17°.
January, year by year
The average January high in each year. The warmest, 2024, averaged 17°C; the coolest, 2015, 13°C.
Compared with home
Average January highs. Expect rain on about 7 days (64 mm in a typical month).
- Lisbon14°
- Cork9°
- Dublin8°
- London8°
- Belfast7°
- Manchester7°
- Glasgow6°
Warmer in January, not much further
Flying times are estimates from Dublin; Lisbon is about 2h 30m.
Cool in Jan
16°C average high
avg high · 8° at night
25°C+ on rarely
Cool in Jan
16°C average high
avg high · 9° at night
25°C+ on rarely
Air: ERA5 reanalysis via Open-Meteo, 2011–2025. Sea: Copernicus Marine analysis via Open-Meteo, 2023–2025. Rainy day = 2 mm or more. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology