United Kingdom Hdd
gb-hdd
Heating Degree Days — cumulative degrees below 18°C weighted by days in the month. Higher values indicate colder weather and greater heating demand. Derived from ERA5 reanalysis monthly means at one representative point per country (capital or economic center).
Representative point: London. For large countries the economic center is used rather than the geographic centroid. Source: Copernicus Climate Data Store (ERA5 + SEAS5 seasonal forecast). License: CC BY 4.0.
Latest Value
8.1
as of Aug 1, 2026
Time Series (60 observations)
Recent Data
| Date | Value | Type |
|---|---|---|
| Aug 1, 2026 | 8.1 | Forecast |
| Jul 1, 2026 | 84.6 | Forecast |
| Jun 1, 2026 | 0 | Actual |
| May 1, 2026 | 98.3 | Actual |
| Apr 1, 2026 | 214.8 | Actual |
| Mar 1, 2026 | 300.1 | Actual |
| Feb 1, 2026 | 289 | Actual |
| Jan 1, 2026 | 402.7 | Actual |
| Dec 1, 2025 | 329.8 | Actual |
| Nov 1, 2025 | 269.7 | Actual |
| Oct 1, 2025 | 188.2 | Actual |
| Sep 1, 2025 | 105.6 | Actual |
| Aug 1, 2025 | 0 | Actual |
| Jul 1, 2025 | 0 | Actual |
| Jun 1, 2025 | 0 | Actual |
Showing most recent 15 of 60 observations
Data Source
Copernicus Climate Change Service (C3S)
Related Data
View all United Kingdom data →API Access
# Fetch data by canonical code
GET /api/v1/timeseries/canonical/gb-hdd
# With date filters
GET /api/v1/timeseries/canonical/gb-hdd?start_date=2020-01-01
# Point-in-time reconstruction (Pro)
GET /api/v1/timeseries/canonical/gb-hdd?as_of=2024-01-01