Temperature blanket 2027 · Sheffield

Sheffield temperature blanket 2027

For a DK blanket about 110cm wide in Sheffield, plan 13 colours in 2°C steps, from below 4°C to 26°C and above. That’s about 21 balls of a 295m DK such as Stylecraft Special DK, enough in 9 of the last 10 years.

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1 Jan 2025Sheffield, 202531 Dec

How Sheffield’s days split into colours

Days per 2°C colour band in Sheffield, 2016–2025, and balls of 295m DK at 10m per row
Daily highTypical year9 in 10 yearsBalls
Below 4°C13 days18 days1
4 to 6°C19 days22 days1
6 to 8°C28 days36 days2
8 to 10°C42 days50 days2
10 to 12°C42 days54 days2
12 to 14°C40 days45 days2
14 to 16°C34 days42 days2
16 to 18°C34 days44 days2
18 to 20°C42 days44 days2
20 to 22°C36 days39 days2
22 to 24°C20 days24 days1
24 to 26°C10 days17 days1
26°C and above9 days16 days1

Sheffield’s year in numbers

Where the numbers come from

For each place we took ten full years of hourly temperatures, 2016 to 2025, from ERA5-Land, a climate reanalysis on a grid of about 9km, and kept the highest value in each UK calendar day. Grid cells run cooler than a thermometer on a lawn, so we corrected every place month by month using the gap between the grid and the three nearest Met Office stations with published monthly averages.

To check the correction we hid each of the 31 stations in turn and predicted its monthly average high from the others. The corrected figures were within 1°C in 78% of 3,720 station-months (typical error 0.6°C), against an average gap of 1.4°C before correction. A single day can still be out by more, so treat the counts as a guide to your year, not a day-by-day record.

We also compared five places with daily records from nearby weather stations (London with Heathrow, Belfast with Aldergrove, Plymouth with Mountbatten, Aberdeen with Dyce and Douglas with Ronaldsway). The total number of balls for a 2°C DK blanket matched within one ball in all five. The grid smooths the hottest days, so single colours at the warm end can come out a little short, most of all on the coast.

“Enough in 9 of 10 years” means the second-highest count of the ten years: in nine of the ten years that colour needed no more days than that.

For Sheffield, the grid cell is centred at 53.4°N, 1.5°W, corrected with Sheffield (1km), Bradford (52km), Sutton Bonington (63km).

Data: contains modified Copernicus Climate Change Service information 2016–2025 (ERA5-Land hourly 2m temperature; neither the European Commission nor ECMWF is responsible for any use of this information). Weather data by Open-Meteo.com open data, licensed under CC BY 4.0. Met Office historic station data © Crown copyright, licensed under the Open Government Licence v3.0. Daily highs derived and bias-adjusted by HazelLoop.

More places

All UK temperature blanket towns · Yarn per colour, explained