Yachts?­men should bear in mind a Deauville if you can see the port of Le Havre, it will rain in the afternoon, and if you can't, it's already raining.
It always rains because of its latitude. 
mnli hypothesis: It always rains because of its latitude.  premise: Yachts?­men should bear in mind a Deauville if you can see the port of Le Havre, it will rain in the afternoon, and if you can't, it's already raining.