Resumen
Based on 20 years of daily data the precipitation patterns of Baja California Sur, Mexico are studied as well as the precipitation during the passage of the cyclones which came within 250 km of its coast. the 30 cyclones here treated have a moderate average contribution (20%) to the annual precipitation and show a different precipitation pattern from the annual values. however the recharge to the acquifers may still benefit from the observed heavy localized rains during the passage of some cyclones or at times like in 1967 and 1977 when the cyclones contributed to about 45 and 69% of the annual precipitation.