when2visit

Where to find the ideal weather?

Check the climate for each place in the world


Do you want to visit some lovely place but you don't know when? Or you happen to have some free time for travelling but you don't know where to go? From now on you can easily find all relevant information on one single map!

How does it work?

Click on the layers icon, choose the week you want to travel and the map will show you areas:

  • green: Here you’ll find the statistically best weather in the world!
  • red: It might be a too hot over here,
  • blue: It might get colder than you like it.

The full MAP LEGEND you can see after clicking on the "?" menu icon.

When you click on the map, the menu will open and you will see the chart with climate conditions in signed place during the whole yaer. The UTCI Index value (degrees Celsius) is shown on the left axis, on the right you can see the percent of day with rainfall.

You should always remember that the information shown on the map is based on climate conditions. This means that the real weather will probably be slightly different than the average that you see on the map.

What do I see on the map?

The map is based on the Universal Thermal Climate Index (UTCI). It indicates in a simplified way the impact of the outdoor environment on the human body. On the map you can see the index value that does not cause thermal stress to the human body (green areas) and values that indicate places that can provoke heat and cold stress (red and blue areas). You can change your thermal preferences but the default option should be OK for most people. If you are not sure, you can check the results for a date and location you know.

We are working on extending the dataset. The grey shades enabled by default show the average length of precipitation over the day. Additional components can be switched off or another layer can be activated (e.g. for average snow depth).

It’s not only about the temperature

Why an information about air temperature is not enough? In short, other meteorological parameters greatly influence how much energy enters and escapes the human body - whether we are additionally heated by the sun, cooled by the wind and how effectively the body's cooling system is able to function. The UTCI index is the result of an equation based on:

  • air temperature,
  • wind speed,
  • radiation,
  • humidity.

Scientists have defined a range of UTCI values (in degrees Celsius), in which the human body functions most optimally. You can read HERE.about the UTCI and the scale.

On the map you can also see information about other climate parameters such as precipitation and snow cover.

Some more details

  • The results are based on statistical data analysis and cover nearly the last 30 years (1991 - 2018).
  • The results are based on daily statistics from these period of time.
  • The UTCI data shows the index value for the daytime. Precipitation duration refeers to the 24 hours.
  • The date you can choose is based on an average year that was divided in 52 weeks. The results shown on the map represent the average value for one day in the middle of every week of this year.

The data

  • The analysis are based on Copiernicus Climate Change Service information 2021.
  • Universal thermal climate index is derived from ERA5 reanalysis.
  • The precipitation duration component is based on AgERA5 historic and near real time forcing data.
  • The basemap data: OpenStreetMap contributors.