Lisbon Weather in December
Portugal · Mediterranean climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
December in Lisbon sees average temperatures ranging from a low of 10.5°C (50.9°F) to a high of 16.0°C (60.8°F), with a mean of 13.0°C (55.4°F). Compared to the annual average of 17.2°C (63.0°F), this month is 4.2°C cooler than the yearly norm. Precipitation averages 97.6mm, making it approximately 48.0mm wetter than the monthly average of 49.0mm. The city receives an average of 7.2 hours of sunshine per day during December, with relative humidity averaging 83.0%. Wind speeds reach an average maximum of 18.9 km/h. For travelers, this month offers a temperature experience in Lisbon, with wetter-than-average conditions compared to the rest of the year.
Lisbon's hills plus humidity make packing an art form. I showed up in July in linen — big mistake, the UV hits 9 and the city is essentially a suntrap. Pack breathable layers, a wide-brim hat, and the strongest SPF you own. My ideal window is mid-September to mid-October: 24°C, fewer crowds, and the Tagus breeze actually feels good. Skip February — it's wetter than you'd think. Tram 28 in summer is a sweatbox; ride it in November instead, when it's 16°C and the queues vanish.
December vs Adjacent Months
| Metric | November | December | January |
|---|---|---|---|
| Mean Temp | 15.2°C (59.4°F) | 13.0°C (55.4°F) | 11.6°C (52.9°F) |
| Rainfall | 59.6mm | 97.6mm | 56.0mm |
| Sunshine | 7.6 hrs | 7.2 hrs | 7.7 hrs |
| Humidity | 81.6% | 83.0% | 81.1% |
| Wind | 17.6 km/h | 18.9 km/h | 18.3 km/h |
| Rainy Days | 12.6 | 15.4 | 11.4 |
Seasonal Context
December falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Lisbon in December, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Lisbon in December?
The average temperature in Lisbon during December ranges from 10.5°C (50.9°F) to 16.0°C (60.8°F), with a mean of 13.0°C (55.4°F).
How much does it rain in Lisbon in December?
Lisbon receives an average of 97.6mm of precipitation in December, spread across approximately 15.4 rainy days.
What should I pack for Lisbon in December?
Based on December weather data, pack warm layers, a medium jacket, and waterproof outerwear.
Is December a good time to visit Lisbon?
December is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Lisbon
Cities with Similar December Climate (Mediterranean)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 38.72°, -9.14°. Timezone: Europe/Lisbon. Last updated: 2026-07-30.