Rainfall in Mallorca Normally, the rainy season lasts from October to March, while the summer months are usually quite dry. On the west and south coast of the island, the average annual rainfall is between 300 and 500 mm, while in the mountainous areas of the north and west it can exceed 1,000 mm per year.

Mallorca does not have a "monsoon" style rainy season, but it does follow a distinct Mediterranean precipitation pattern where the autumn months are significantly wetter than the rest of the year. The period from October to December is typically considered the rainiest time on the island. During these months, the island can experience heavy, localized downpours known as the "Gota Fría" (Cold Drop), caused by warm Mediterranean air meeting cooler polar fronts. October is historically the wettest month, averaging about 63mm of rain, though many days remain sunny and pleasant. In contrast, the summer months of June, July, and August are extremely dry, often seeing almost no measurable rainfall for weeks at a time. For travelers in 2026, the northern Sierra de Tramuntana mountain range consistently receives more rainfall than the southern plains due to orographic lifting. While rain is infrequent during the peak tourist season, the autumn rains are vital for the island’s lush landscape and the replenishment of its reservoirs, making the "off-season" a beautiful, green time to visit if you don't mind the occasional umbrella.