Reference Data in Rennes 12 indicators covering reference data for Rennes. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 41.35 Degree days 2025 down 18.8% 804th Cooling and heating degree days - Cities and FUAs — Change in cooling -5.1 Degree days 2025 down 214.4% 594th Cooling and heating degree days - Cities and FUAs 1,341 Degree days 2025 down 6.8% 758th Cooling and heating degree days - Cities and FUAs — Change in heating -355.66 Degree days 2025 down 37.8% 724th Precipitation - Cities and FUAs — Extreme precipitation days 2.6 Days per year 2024 up 160.0% 1053rd Precipitation - Cities and FUAs — Change in extreme precipitation 0.0597 Days per year 2024 up 103.9% 856th Dependency ratio - Cities and FUAs 21.7 Percentage of population aged 15-64 years 2022 up 11.3% 974th Wind threats - Cities and FUAs — Exposure to wind threats 35.08 Percentage of area 2023 down 64.9% 146th Coastal flooding - Cities and FUAs — Built-up area exposure to 0 Percentage of built-up area 2022 — 277th Main mode of transport to work - Cities and FUAs — Employed persons 115,472 Persons 2022 up 10.8% 150th Internet speed - Cities and FUAs — Downloading speed 6.5 Percentage of national value 2025 down 76.6% 615th Internet speed - Cities and FUAs — Uploading speed 12.5 Percentage of national value 2025 down 18.3% 431st