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We built VanSky — a comfort index for cities, a week ahead
You're going to a country for a week. You open VanSky and see its cities sorted by comfort for the next seven days. No five open forecasts, no trying to remember where it was +18 without rain and where it was +30 and stuffy.
Standard scene: you head to Turkey for a week, open the forecast for Istanbul, then Antalya, then Cappadocia. Twenty minutes later you have already forgotten where it was +18 without rain and where they were forecasting a third day of thunderstorms. So that this stops happening, we built VanSky.
One screen instead of five forecasts
On a country page — its cities, sorted by the index from 0 to 100 for the next seven days. Above 80 — go without thinking. Below 40 — wait it out or shift elsewhere. In between — check the details: the same city can be «great» three days and «no way» four.
Why «comfort», not just temperature
+30 in Lisbon and +30 in Cairo are not the same thing. Humidity differs, wind differs, precipitation differs. VanSky calculates the index across five parameters: temperature, humidity, wind, precipitation and sunshine. Data comes from Open-Meteo (refreshed every three hours), coverage — 162 countries and around 320 cities.
The comfort index formula
Each of the five parameters is normalised to the optimal range for vanlife travel and gets a score from 0 to 100. Weights according to the internal measurements of the OpenVan.camp Editorial team: temperature — 35%, precipitation — 25%, wind — 15%, humidity — 15%, sunshine — 10%. The final index is the weighted average across all five. The scale was calibrated on 50+ cities with clear reference points: Lisbon in May — around 85, Istanbul in November — around 55, Reykjavik in February — around 20.
On a city page — a full seven-day forecast by the hour and a map with cloud cover and wind. Handy when the destination is already chosen and you need to plan specific days — where to spend the morning, where to head by the evening.
What not to expect
VanSky does not work in Antarctica and in eleven island micro-states — Open-Meteo has no data there. And this does not make the weather any better. It just means you can immediately see in which city it is the way you promised yourself.