Leiria climate
Leiria (Portugal) has a hot-summer Mediterranean climate (Köppen Csa). The average temperature over the year is 16 °C61 °F, and about 658 mm26 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Leiria climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 1458 | 642 | 1050 | 843.3 | 2 |
| Feb | 1560 | 643 | 1151 | 632.5 | 1 |
| Mar | 1864 | 846 | 1355 | 712.8 | 0 |
| Apr | 2068 | 1049 | 1559 | 642.5 | 0 |
| May | 2475 | 1253 | 1864 | 421.7 | 0 |
| Jun | 2780 | 1458 | 2169 | 180.7 | 0 |
| Jul | 2984 | 1560 | 2272 | 60.2 | 0 |
| Aug | 2985 | 1660 | 2373 | 100.4 | 0 |
| Sep | 2781 | 1559 | 2170 | 311.2 | 0 |
| Oct | 2373 | 1355 | 1864 | 943.7 | 0 |
| Nov | 1763 | 948 | 1356 | 1003.9 | 0 |
| Dec | 1558 | 643 | 1051 | 763.0 | 1 |
| Year | 2985 | 642 | 1661 | 65826 | 4 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 85% | 62% | 2.1 | 9:39 |
| Feb | 81% | 56% | 3.1 | 10:38 |
| Mar | 77% | 58% | 4.2 | 11:50 |
| Apr | 75% | 57% | 5.4 | 13:12 |
| May | 71% | 49% | 6.6 | 14:21 |
| Jun | 69% | 42% | 7.2 | 14:58 |
| Jul | 67% | 31% | 7.4 | 14:43 |
| Aug | 67% | 30% | 6.7 | 13:43 |
| Sep | 69% | 38% | 5.2 | 12:23 |
| Oct | 75% | 53% | 3.5 | 11:04 |
| Nov | 82% | 57% | 2.4 | 9:55 |
| Dec | 85% | 60% | 1.9 | 9:22 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Leiria is like
The warmest month is August, with an average high of 29 °C85 °F and a low of 16 °C60 °F. The coldest is January, when highs average 14 °C58 °F and lows 6 °C42 °F. There is a clear seasonal cycle, with 12.6 °C22.6 °F between the average temperature of the warmest and the coolest month.
Annual precipitation is moderate at about 658 mm26 in. The wettest three-month stretch is October–December, which brings 41% of the annual total. Months with less than 20 mm0.8 in on average: June–August. The wettest month is November (100 mm3.9 in), the driest is July (6 mm0.2 in).
Relative humidity ranges from 67% in August to 85% in January. The clearest skies (lowest average cloud amount, 30%) are typical of August. Average wind speed near the ground ranges from 7 km/h (4 mph) in September to 9 km/h (5 mph) in July. Daylight lasts from about 9.4 hours in December to 15.0 hours in June.
Best time to visit Leiria
Based on these averages, the most comfortable months for sightseeing and outdoor activities are April–October: average highs of 20 °C68 °F to 29 °C85 °F with 6 mm0.2 in to 94 mm3.7 in of precipitation per month.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Leiria
- Winter (December–February) — highs 1458 to 15 °C60 °F, lows around 6 °C42 °F, about 74 mm2.9 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
- Spring (March–May) — highs 1864 to 24 °C75 °F, lows 846 to 12 °C53 °F, about 59 mm2.3 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 2780 to 29 °C85 °F, lows 1458 to 16 °C60 °F, about 11 mm0.4 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
- Autumn (September–November) — highs 1763 to 27 °C81 °F, lows 948 to 15 °C59 °F, about 75 mm3.0 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
How Leiria compares
Compared with Coimbra, about 61 km to the northeast, Leiria is on average 0.4 °C0.7 °F cooler and receives 22% less precipitation (658 mm26 in vs 846 mm33 in). The difference is largest in August (2.4 °C4.3 °F cooler).
Of the 9 places in Portugal covered by World Climates, Leiria is the 5th warmest by annual mean temperature and the 5th wettest by annual precipitation. See all of them on the Portugal climate page.
Places in other countries with the most similar temperature and rainfall pattern (seasons shifted for the other hemisphere where needed): Toulon (France, Csa), Chillán (Chile, Csa) and Nice (France, Csa).
Nearby places
- Coimbra 61 km · 17 °C62 °F · 846 mm33 in
- Amadora 116 km · 15 °C60 °F · 575 mm23 in
- Lisbon 117 km · 16 °C61 °F · 541 mm21 in
- Viseu 127 km · 14 °C57 °F · 1,016 mm40 in
- Setúbal 136 km · 17 °C63 °F · 535 mm21 in
- Porto 157 km · 15 °C59 °F · 1,009 mm40 in
- Badajoz 185 km · 17 °C62 °F · 544 mm21 in
- Braga 204 km · 15 °C59 °F · 1,035 mm41 in
Frequently asked questions
What is the warmest month in Leiria?
August is the warmest month in Leiria, with an average high of 29 °C (85 °F) and an average low of 16 °C (60 °F).
What is the coldest month in Leiria?
January is the coldest month, with an average high of 14 °C (58 °F) and an average low of 6 °C (42 °F).
When does it rain the most in Leiria?
November is the wettest month with about 100 mm (3.9 in) of precipitation; July is the driest with about 6 mm (0.2 in).
What is the best time to visit Leiria?
Judging by long-term averages, the most comfortable months are April–October.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 130 m, while Leiria lies at about 33 m. Temperatures on this page were therefore adjusted by +0.6 °C1.1 °F using the standard lapse rate of 6.5 °C per 1,000 m.