This figure may be used for teaching purposes.
Please cite the source as mentioned below the chart.

  – GIF KB – Atlas p. .

Source: Pfister L, Wagner C, Vansuypeene E, Drogue G, Hoffmann L (2005) Atlas climatique du grand-duché de Luxembourg. Musée national d’histoire naturelle, Société des naturalistes luxembourgeois, Centre de recherche public Gabriel Lippmann, Administration des services techniques de l’agriculture. Luxembourg. ISBN 2-919877-24-0.