UK electricity in December 2021
Day by day: how Great Britain made its electricity in December 2021.
In December 2021, gas made 37% of Britain's electricity, then wind (26%). Renewables made 35%, against 34% a year earlier; average carbon intensity 186 g/kWh.
Electricity generated each day, December 2021
GWh a day
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the numbers
- Nuclear
- Gas
- Hydro
- Imports
- Biomass
- Pumped storage
- Wind
- Solar
- Coal
- Other
Share of electricity, by source
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the numbers
Carbon intensity
g CO₂ per kWh, daily average
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the numbers
December 2021 in total
| Source | Electricity | Share |
|---|---|---|
| Gas | 9,877 GWh | 37.0% |
| Wind | 6,905 GWh | 25.9% |
| Nuclear | 4,255 GWh | 15.9% |
| Imports | 2,230 GWh | 8.4% |
| Biomass | 1,929 GWh | 7.2% |
| Coal | 563 GWh | 2.1% |
| Hydro | 390 GWh | 1.5% |
| Pumped storage | 197 GWh | 0.7% |
| Solar | 195 GWh | 0.7% |
| Other | 151 GWh | 0.6% |
| Renewable (wind, solar, hydro, biomass) | 35.3% | |
| Low carbon (renewable plus nuclear) | 51.2% |
Standout days
- Windiest day384.2 GWh of windWed, 1 December 2021
- Highest wind share48.0%Sat, 25 December 2021
- Sunniest day20.5 GWh of solarThu, 2 December 2021
- Cleanest day71 g/kWh averageThu, 30 December 2021
- Dirtiest day295 g/kWh averageTue, 21 December 2021
Every day
| Day | Total | Wind | Gas | Nuclear | Solar | Carbon |
|---|---|---|---|---|---|---|
| Wed 1 Dec | 944 GWh | 41% | 28% | 13% | 1% | 138 g |
| Thu 2 Dec | 967 GWh | 27% | 37% | 13% | 2% | 191 g |
| Fri 3 Dec | 943 GWh | 24% | 42% | 13% | 1% | 212 g |
| Sat 4 Dec | 832 GWh | 37% | 29% | 15% | 2% | 140 g |
| Sun 5 Dec | 842 GWh | 31% | 34% | 14% | 1% | 172 g |
| Mon 6 Dec | 970 GWh | 29% | 42% | 13% | 0% | 206 g |
| Tue 7 Dec | 952 GWh | 34% | 35% | 13% | 0% | 181 g |
| Wed 8 Dec | 959 GWh | 34% | 33% | 12% | 1% | 173 g |
| Thu 9 Dec | 954 GWh | 25% | 41% | 13% | 1% | 215 g |
| Fri 10 Dec | 944 GWh | 32% | 35% | 13% | 2% | 181 g |
| Sat 11 Dec | 844 GWh | 27% | 33% | 15% | 0% | 201 g |
| Sun 12 Dec | 781 GWh | 34% | 24% | 16% | 1% | 145 g |
| Mon 13 Dec | 888 GWh | 25% | 39% | 14% | 0% | 204 g |
| Tue 14 Dec | 898 GWh | 27% | 38% | 14% | 1% | 209 g |
| Wed 15 Dec | 887 GWh | 27% | 38% | 14% | 1% | 195 g |
| Thu 16 Dec | 873 GWh | 9% | 53% | 14% | 1% | 273 g |
| Fri 17 Dec | 866 GWh | 5% | 55% | 15% | 1% | 279 g |
| Sat 18 Dec | 805 GWh | 6% | 53% | 16% | 1% | 258 g |
| Sun 19 Dec | 816 GWh | 7% | 55% | 16% | 1% | 251 g |
| Mon 20 Dec | 895 GWh | 6% | 55% | 16% | 0% | 281 g |
| Tue 21 Dec | 910 GWh | 4% | 55% | 16% | 0% | 295 g |
| Wed 22 Dec | 942 GWh | 15% | 47% | 17% | 1% | 247 g |
| Thu 23 Dec | 877 GWh | 21% | 42% | 18% | 0% | 195 g |
| Fri 24 Dec | 808 GWh | 26% | 34% | 20% | 0% | 162 g |
| Sat 25 Dec | 753 GWh | 48% | 14% | 21% | 0% | 76 g |
| Sun 26 Dec | 751 GWh | 37% | 24% | 22% | 1% | 113 g |
| Mon 27 Dec | 757 GWh | 20% | 35% | 21% | 0% | 166 g |
| Tue 28 Dec | 761 GWh | 22% | 31% | 21% | 1% | 146 g |
| Wed 29 Dec | 777 GWh | 39% | 18% | 21% | 1% | 98 g |
| Thu 30 Dec | 772 GWh | 46% | 13% | 21% | 0% | 71 g |
| Fri 31 Dec | 726 GWh | 43% | 15% | 22% | 1% | 77 g |