Reference Data in Hartford 12 indicators covering reference data for Hartford. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 115.25 Degree days 2025 down 48.6% 624th Cooling and heating degree days - Cities and FUAs — Change in cooling -66.61 Degree days 2025 down 257.6% 1166th Cooling and heating degree days - Cities and FUAs 2,602 Degree days 2025 down 3.3% 147th Cooling and heating degree days - Cities and FUAs — Change in heating -28.21 Degree days 2025 down 147.5% 154th Precipitation - Cities and FUAs — Extreme precipitation days 13.73 Days per year 2024 up 9.7% 344th Precipitation - Cities and FUAs — Change in extreme precipitation -1.11 Days per year 2024 up 52.1% 1107th Dependency ratio - Cities and FUAs 28.9 Percentage of population aged 15-64 years 2024 up 25.1% 636th Wind threats - Cities and FUAs — Exposure to wind threats 100 Percentage of area 2023 up 6.7% 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 411,729 Persons 2023 down 9.0% 42nd Internet speed - Cities and FUAs — Downloading speed 13.8 Percentage of national value 2025 up 142.1% 363rd Internet speed - Cities and FUAs — Uploading speed 36.2 Percentage of national value 2025 up 159.1% 138th