Reference Data in New Haven 16 indicators covering reference data for New Haven. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 121.12 Degree days 2025 down 40.9% 606th Cooling and heating degree days - Cities and FUAs — Change in cooling -48.97 Degree days 2025 down 240.6% 1107th Cooling and heating degree days - Cities and FUAs 2,404 Degree days 2025 down 2.6% 203rd Cooling and heating degree days - Cities and FUAs — Change in heating -17.23 Degree days 2025 down 136.3% 131st Cooling and heating degree days - Cities and FUAs — Change in heating 93.1 % change on previous year 2025 up 227.9% 90th Cooling and heating degree days - Cities and FUAs, annual growth rate 10.71 % change on previous year 2025 up 318.8% 186th Cooling and heating degree days - Cities and FUAs — Change in cooling -223.19 % change on previous year 2025 down 200.3% 1056th Cooling and heating degree days - Cities and FUAs — Cooling degree -42.28 % change on previous year 2025 down 194.7% 700th Precipitation - Cities and FUAs — Extreme precipitation days 14.36 Days per year 2024 down 0.5% 315th Precipitation - Cities and FUAs — Change in extreme precipitation -1.78 Days per year 2024 down 4.2% 1184th Dependency ratio - Cities and FUAs 30.7 Percentage of population aged 15-64 years 2024 up 29.0% 530th Wind threats - Cities and FUAs — Exposure to wind threats 100 Percentage of area 2023 up 13.1% 1st Coastal flooding - Cities and FUAs — Built-up area exposure to 0.4075 Percentage of built-up area 2022 down 4.4% 135th Main mode of transport to work - Cities and FUAs — Employed persons 444,312 Persons 2023 down 5.6% 38th Internet speed - Cities and FUAs — Downloading speed 18.6 Percentage of national value 2025 up 244.4% 225th Internet speed - Cities and FUAs — Uploading speed 52.1 Percentage of national value 2025 up 189.8% 60th