Climate region finder

The ground, the sky over it as a dome, and the sun on its round. By night the sun goes round under the ground. Drag the model to turn it, drag the sun to move it.
Seen from the ground
Seen from the zenith The zenith is the point of the sky straight overhead. It is the middle of the drawing, and the rim is the horizon.

    How to read it

    Hours are counted by the sun: at 12:00 the sun stands at its highest. The clock of the place runs ahead of the sun or behind it, depending on its time zone.

    At the equinoxes the sun rises in the east and sets in the west, and day and night are close to equal. At the solstices the day is at its longest or at its shortest.

    At sunrise and at sunset the upper edge of the sun touches the horizon, so its centre stands a little below it. The ground is taken as flat and open: hills and buildings around the site are not counted.

    The temperatures, the hills and the wind rose come from PVGIS, once it has been asked for this location with the button in the air card. The temperature of each hour is that of the typical year PVGIS puts together for the point chosen, and between two hours it is taken on a straight line. These are not readings of a station at the site. The hills are the land only, never buildings or trees, and their heights are drawn three times larger so that they show. The wind rose is the share of the hours of the year in which the wind came from each direction. The climate region above is that of the years 1991 to 2020.

    The stars of the night in the model are there for the eye. They are not the stars of the real sky.