Altsasu

What is the climate like in Altsasu?

The best time to visit Altsasu is typically July – August, with trip comfort peaking in July (7.1/10). Altsasu is warmest in August, when daily highs average 77°F (25°C), and coolest in January, when lows fall to about 36°F (2°C). The wettest month is typically November and the driest is July; the year sees roughly 50 in (1274 mm) of precipitation.

• Best time to visitJuly – August — comfort peaks in July (7.1/10)
• Warmest monthAugust — average high 77°F (25°C)
• Coolest monthJanuary — average low 36°F (2°C)
• Wettest monthNovember (5.5 in (140 mm))
• Driest monthJuly (2.2 in (55 mm))
• Annual precipitation50 in (1274 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromPamplona (observatorio), 44 km away (1953-2026)