Languedoc is the region of France with the most sun! It's warm and dry and beautiful from April through November with glorious blue skies. Montpellier gets over 300 days of sun per year! July and August can be quite hot, although it's always dry and cool in the shade.
Here's a weather chart so you can judge for yourself how much sun there is and how little rain.
For more details on the average high and low temperatures by month see:
http://www.languedoc-france.info/1101_temperatures.htm
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