At home the geyser most of the time it leaks more occassionary during the rainy season and few times in sumer, what could be the reason and how could it be fixed?

I assume by saying "geyser" you mean garden hose valve...

With good, healthy washer, hose valve should hold all pressure your house gets. I suggest you replace washer first. Also, hose valves are inexpensive. You can even consider purchasing and installing new one.

Back to you. Milo

Exactly where is the leak occurring? I can't see seasons or weather conditions being a factor here.

Milo,
I believe geyser is British term for water heater..