Climate averages 1991–2020
Lisbon weather
in December.
A cool, moderately wet month: the 10th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Lisbon: daytime highs average 14.3°C and nights cool to about 10.2°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 79 mm of rain on roughly 9 days, which makes December a moderately wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 31 min on an average December day.
The nearest other city in this atlas is Amadora (8 km away). In December its highs average 14.6°C, about as warm as Lisbon, with 79 mm of rain.
Among the 12 cities listed in Portugal, Lisbon ranks joint 7th of 12 for the warmest December highs and joint 2nd of 12 for the driest December (rainfall, lowest first). The mean December high of those 12 cities is 14.4°C; Lisbon is 0.1°C cooler than that mean.
From December to January, average highs fall by 0.9°C to 13.4°C, and monthly rainfall falls from 79 mm to 68 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Lisbon climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 13.4°C9.1°C | 9.1°C | 68 | 8.9 | 9.810 h |
| February | 14.2°C9.2°C | 9.2°C | 52 | 7.6 | 10.711 h |
| March | 16.4°C10.8°C | 10.8°C | 53 | 8.1 | 11.912 h |
| April | 17.9°C12.2°C | 12.2°C | 51 | 8.4 | 13.213 h |
| May | 20.5°C14.3°C | 14.3°C | 42 | 5.9 | 14.314 h |
| June | 23.6°C16.6°C | 16.6°C | 9.9 | 2.1 | 14.815 h |
| July | 25.7°C18.0°C | 18.0°C | 2.0 | 0.6 | 14.615 h |
| August | 26.3°C18.6°C | 18.6°C | 4.1 | 1.0 | 13.714 h |
| September | 24.4°C17.8°C | 17.8°C | 29 | 4.1 | 12.512 h |
| October | 20.9°C15.7°C | 15.7°C | 77 | 8.9 | 11.211 h |
| November | 16.7°C12.4°C | 12.4°C | 82 | 10.2 | 10.110 h |
| December, selected | 14.3°C10.2°C | 10.2°C | 79 | 9.3 | 9.510 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Amadora in DecemberPortugal · 8 kmHigh 14.6°C · Low 9.7°C · 79 mm rain
- Queluz in DecemberPortugal · 10 kmHigh 14.7°C · Low 10.7°C · 79 mm rain
- Setúbal in DecemberPortugal · 32 kmHigh 15.4°C · Low 9.4°C · 77 mm rain
- Leiria in DecemberPortugal · 117 kmHigh 15.0°C · Low 8.2°C · 91 mm rain
- Coimbra in DecemberPortugal · 176 kmHigh 14.3°C · Low 6.0°C · 111 mm rain
- Badajoz in DecemberSpain · 190 kmHigh 13.9°C · Low 5.8°C · 59 mm rain
- Aveiro in DecemberPortugal · 218 kmHigh 14.3°C · Low 7.6°C · 141 mm rain
- Faro in DecemberPortugal · 218 kmHigh 15.9°C · Low 12.1°C · 90 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Lisbon) is explained once on the Lisbon year overview and on the Sources, method and limits page.
Amadora and Queluz lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.