July is the best month for climbing, as stiff northern winds start gusting in August.
September to December:
This is a good time of year for climbing smaller mountains and for trekking. This season is the equivalent of spring in the Southern Hemisphere. It is a time of gentle spring showers, generally after midday as a result of clouds gathering in the morning. Rain showers, sometimes accompanied by electric storms, tend to peter out within minutes before giving way to clear skies and starry nights.
December to May:
The rain season. It rains heavily nearly every afternoon for two or three hours, although there are occasionally lighter and more drawn-out showers. Like the season just before it, most precipitation falls in rainstorms. This season is not apt for climbing. Only on days when it does not rain is it possible to walk through any of the gullies. Streams, while nearly entirely dried up during winter, eventually become impossible to cross during this season.
