Climate almanac

Riachos

Santarém, Portugal · 39.44°, -8.51°

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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)