Rennes

What is the climate like in Rennes?

The best time to visit Rennes is typically May – September, with trip comfort peaking in August (7.6/10). Rennes is warmest in July, when daily highs average 76°F (24°C), and coolest in January, when lows fall to about 38°F (3°C). The wettest month is typically October and the driest is August; the year sees roughly 31 in (781 mm) of precipitation.

• Best time to visitMay – September — comfort peaks in August (7.6/10)
• Warmest monthJuly — average high 76°F (24°C)
• Coolest monthJanuary — average low 38°F (3°C)
• Wettest monthOctober (3.2 in (81 mm))
• Driest monthAugust (1.7 in (43 mm))
• Annual precipitation31 in (781 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromRennes-st Jacques, 6 km away (1945-2026)