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Credits and licences

This site shows each place's temperature as a spiral: every month compared with the average, one turn per year. It is free to use and has no tracking, no cookies and no third-party requests.

Temperature data

The place selector offers several sources. Each is credited below with the text its provider asks for. The values were converted to a compact format for this site; where a source gives daily values, the monthly means are computed here. For stations the seasonal cycle is removed, so a spiral shows each month compared with the same month of other years.

The Berkeley Earth city and regional files end in December 2020; the other sources end when their last download did, shown under each spiral. Berkeley Earth values before about 1850 are largely reconstructed from very few stations, so the early years are much less reliable.

Maps

Natural Earth land and country outlines (1:110m for the globe, 1:50m simplified for the selected country). Public domain. naturalearthdata.com.

Ideas

The climate spiral was created by Ed Hawkins, University of Reading (climate-lab-book.ac.uk/spirals). The warming stripes were also created by Ed Hawkins (showyourstripes.info).

Software and fonts