Where the data comes from
Five public datasets, all openly licensed. Every page names the ones it used and the date each was fetched.
Every figure on this site traces back to one of these five.
City name, country, continent, coordinates, population, elevation, time zone and whether the city is its country's capital.
Daily weather for the last three full calendar years, aggregated to monthly average high and low temperature, precipitation and sunshine hours, from which the visit score and the best, peak and off-season months are computed.
The country's price level (PPP conversion factor over the market exchange rate) and its local-currency exchange rate, the two inputs to every daily cost estimate.
For the handful of countries the World Bank does not publish a PPP conversion factor or exchange rate for (Taiwan, first): the IMF World Economic Outlook's implied PPP conversion rate (PPPEX) paired with the Federal Reserve H.10 annual average exchange rate, the same two inputs the World Bank entry provides for every other country.
The advisory level (1 to 4) for the city's country, the advisory's own title and the date it was last reviewed.
The UK's safety and security guidance for the country, and the date it was last updated.
The datasets above remain the property of their publishers and are used under the licences named. Attribution is given here and on every page that uses them. Nothing on this site is an official statement by any of those bodies: for a travel advisory that decisions depend on, read it at the source.
The figures derived from them — daily costs, visit scores, best months — are computed with the public formulas, and are estimates rather than quoted or measured values.
A city can be missing a price level, a climate record or an advisory match. Where that happens the page shows a dash and says which figure is unavailable. It never substitutes a regional average or a neighbouring country's rating for the missing value.