Portugal
Lisbon in December: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Lisbon in December is climatically mixed. The average daily high is around 16 °C, and the sea is about 16 °C. With about 11 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
45/100 · #11
Warmth
#10
Dryness
#11
Sun
#12
Sea warmth
#8
Published best categories: none
Lisbon · DecemberPhoto: Dale Cruse - 10M views from San Francisco, CA, USA · CC BY 4.0Climate facts
- Average high
- 16 °C
- Average low
- 12 °C
- Sea
- 16 °C
- Rainy days (est.)
- 11 rainy days (est.)
- Sun (est.)
- 3 h/day
- Humidity
- 82 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| November | 18 | 14 | 12 | 87 | 3.2 | 81 | 4.8 | 17 | 52 |
| December (selected) | 16 | 12 | 11 | 84 | 2.5 | 82 | 5.0 | 16 | 45 |
| January | 15 | 11 | 10 | 69 | 2.9 | 81 | 4.8 | 15 | 44 |
How do the previous and next months compare?
Baseline: December (45/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| November | +7 | +1.9 °C | +1.8 °C | +0.5 | +2.8 mm | +0.7 h | -1.4 % | -0.2 m/s | +1.2 °C |
| January | -1 | -0.9 °C | -1 °C | -0.8 | -15.1 mm | +0.4 h | -1.5 % | -0.2 m/s | -0.8 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Lisbon in December?
The average daily high is around 16 °C, with an average daily low of about 12 °C.
Can you swim in Lisbon in December?
The sea is about 16 °C (cold).
Does it rain a lot in Lisbon in December?
The curated estimate is about 11 rainy days per month, not a directly measured long-term average. Total precipitation averages around 84 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Lisbon?
By the climate score, June, July, August and September are the strongest months for Lisbon. For a beach trip: June, July, August and September. December is not among them.