Reference Data in Vannes 12 indicators covering reference data for Vannes. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 36.2 Degree days 2025 up 77.3% 838th Cooling and heating degree days - Cities and FUAs — Change in cooling 2.98 Degree days 2025 up 123.3% 446th Cooling and heating degree days - Cities and FUAs 1,135 Degree days 2025 down 5.8% 843rd Cooling and heating degree days - Cities and FUAs — Change in heating -323.69 Degree days 2025 down 27.4% 664th Precipitation - Cities and FUAs — Extreme precipitation days 4.25 Days per year 2024 up 13.3% 818th Precipitation - Cities and FUAs — Change in extreme precipitation 1.26 Days per year 2024 up 65.9% 613th Dependency ratio - Cities and FUAs 44.2 Percentage of population aged 15-64 years 2022 up 37.3% 89th Wind threats - Cities and FUAs — Exposure to wind threats 100 Percentage of area 2023 unchanged 1st 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 19,682 Persons 2022 up 8.7% 285th Internet speed - Cities and FUAs — Downloading speed 0.2 Percentage of national value 2025 down 99.0% 883rd Internet speed - Cities and FUAs — Uploading speed 1.4 Percentage of national value 2025 down 97.4% 691st