During the summer season in Atacama, we sometimes have heavy rains and thunderstorms. The period from January through February is called “Altiplanic Winter” with which moist air comes from east (where Bolivia is located) and brings unsettled weather and occasional snow. In this season, we can see winter scenery with snow-capped Licancabur volcano instead of famous Atacama “almost black, dark blue sky.” This is why we call this season “winter” despite the middle of summer. The streets of San Pedro de Atacama are muggy, and it is difficult to walk [texts provided by Masato Ishiguro].