Temperature blanket 2027 · York

York temperature blanket 2027

For a DK blanket about 110cm wide in York, plan 13 colours in 2°C steps, from below 4°C to 26°C and above. That’s about 22 balls of a 295m DK such as Stylecraft Special DK, enough in 9 of the last 10 years.

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1 Jan 2025York, 202531 Dec

How York’s days split into colours

Days per 2°C colour band in York, 2016–2025, and balls of 295m DK at 10m per row
Daily highTypical year9 in 10 yearsBalls
Below 4°C7 days11 days1
4 to 6°C16 days19 days1
6 to 8°C27 days32 days2
8 to 10°C36 days48 days2
10 to 12°C43 days48 days2
12 to 14°C43 days48 days2
14 to 16°C37 days47 days2
16 to 18°C34 days45 days2
18 to 20°C37 days38 days2
20 to 22°C43 days50 days2
22 to 24°C27 days31 days2
24 to 26°C11 days17 days1
26°C and above10 days18 days1

York’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 York, the grid cell is centred at 54°N, 1.1°W, corrected with Bradford (48km), Whitby (65km), Sheffield (70km).

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