Climate almanac
Riachos
Santarém, Portugal · 39.44°, -8.51°
What is the climate like in Riachos?
The best time to visit Riachos is typically May – September, with trip comfort peaking in July (9.1/10). Riachos is warmest in August, when daily highs average 87°F (31°C), and coolest in January, when lows fall to about 43°F (6°C). The wettest month is typically March and the driest is August; the year sees roughly 27 in (683 mm) of precipitation.
- Best time to visitMay – September — comfort peaks in July (9.1/10)
- Warmest monthAugust — average high 87°F (31°C)
- Coolest monthJanuary — average low 43°F (6°C)
- Wettest monthMarch (3.8 in (97 mm))
- Driest monthAugust (0.1 in (4 mm))
- Annual precipitation27 in (683 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromCoimbra/cernache, 78 km away (1996-2022)