Oyonnax

What is the climate like in Oyonnax?

The best time to visit Oyonnax is typically July – August, with trip comfort peaking in July (6.7/10). Oyonnax is warmest in August, when daily highs average 78°F (25°C), and coolest in January, when lows fall to about 31°F (-1°C). The wettest month is typically December and the driest is August; the year sees roughly 68 in (1715 mm) of precipitation.

• Best time to visitJuly – August — comfort peaks in July (6.7/10)
• Warmest monthAugust — average high 78°F (25°C)
• Coolest monthJanuary — average low 31°F (-1°C)
• Wettest monthDecember (7.6 in (192 mm))
• Driest monthAugust (3.9 in (98 mm))
• Annual precipitation68 in (1715 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromGeneve Cointrin, 37 km away (1955-2026)