Reference Data in Hertfordshire (NUTS 2021) 13 indicators covering reference data for Hertfordshire (NUTS 2021). IndicatorLatest Year10-yr change Rank Cooling and heating degree days by NUTS 2 regions - annual data 2,375 Number 2025 down 5.7% 1130th Cooling and heating degree days by NUTS 2 regions - monthly data 337.08 Number 2025 up 48.7% 1336th Deaths (total) by NUTS 3 region 9,973 Number 2018 up 9.0% 413th Deaths by week and NUTS 3 region 186 Number 2020 up 45.3% 334th Deaths by week, sex and NUTS 3 region 186 Number 2020 up 45.3% 334th Deaths by week, sex, 5-year age group and NUTS 3 region 186 Number 2020 up 45.3% 332nd Road accidents by NUTS 3 region 2,053 Number 2018 down 27.5% 339th Area by NUTS 3 region 1,643 Square kilometre 2023 unchanged 1369th National road freight transport by region of unloading (NUTS 3) and ty 9,295 Thousand tonnes 2020 down 63.3% 627th National road freight transport by region of loading (NUTS 3) and type 7,850 Thousand tonnes 2020 down 70.1% 742nd Deaths by age group, sex and NUTS 3 region 9,973 Number 2018 up 9.8% 409th Area by NUTS 3 region 1,643 Square kilometre 2015 down 0.0% 1130th Establishments, bedrooms and bed-places in tourist accommodation by NU 307 Number 2011 down 17.9% 658th