Climate averages 1991–2020
Leiria weather
in December.
A mild, wet month: the 11th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in Leiria: daytime highs average 15.0°C and nights cool to about 8.2°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 91 mm of rain on roughly 10 days, which makes December a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 25 min on an average December day.
The nearest other city in this atlas is Coimbra (61 km away). In December its highs average 14.3°C, 0.7°C cooler than Leiria, with 111 mm of rain.
Among the 12 cities listed in Portugal, Leiria ranks 4th of 12 for the warmest December highs and 7th of 12 for the driest December (rainfall, lowest first). The mean December high of those 12 cities is 14.4°C; Leiria is 0.5°C warmer than that mean.
From December to January, average highs fall by 0.8°C to 14.2°C, and monthly rainfall falls from 91 mm to 88 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
Leiria climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 14.2°C7.0°C | 7.0°C | 88 | 10.5 | 9.710 h |
| February | 15.2°C7.4°C | 7.4°C | 66 | 8.7 | 10.711 h |
| March | 17.6°C9.1°C | 9.1°C | 70 | 9.6 | 11.912 h |
| April | 18.7°C10.4°C | 10.4°C | 73 | 10.5 | 13.213 h |
| May | 21.4°C12.7°C | 12.7°C | 63 | 8.7 | 14.314 h |
| June | 24.4°C15.2°C | 15.2°C | 18 | 3.8 | 14.915 h |
| July | 26.5°C16.6°C | 16.6°C | 6.2 | 1.8 | 14.715 h |
| August | 27.1°C16.9°C | 16.9°C | 9.6 | 2.1 | 13.714 h |
| September | 25.3°C15.7°C | 15.7°C | 41 | 5.6 | 12.512 h |
| October | 21.6°C13.7°C | 13.7°C | 96 | 10.4 | 11.211 h |
| November | 17.2°C10.3°C | 10.3°C | 98 | 11.6 | 10.010 h |
| December, selected | 15.0°C8.2°C | 8.2°C | 91 | 10.3 | 9.49 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
- Coimbra in DecemberPortugal · 61 kmHigh 14.3°C · Low 6.0°C · 111 mm rain
- Aveiro in DecemberPortugal · 101 kmHigh 14.3°C · Low 7.6°C · 141 mm rain
- Amadora in DecemberPortugal · 116 kmHigh 14.6°C · Low 9.7°C · 79 mm rain
- Queluz in DecemberPortugal · 116 kmHigh 14.7°C · Low 10.7°C · 79 mm rain
- Lisbon in DecemberPortugal · 117 kmHigh 14.3°C · Low 10.2°C · 79 mm rain
- Viseu in DecemberPortugal · 127 kmHigh 11.1°C · Low 4.1°C · 160 mm rain
- Setúbal in DecemberPortugal · 136 kmHigh 15.4°C · Low 9.4°C · 77 mm rain
- Porto in DecemberPortugal · 157 kmHigh 13.5°C · Low 7.4°C · 167 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 Leiria) is explained once on the Leiria year overview and on the Sources, method and limits page.