Resumen: Due to its geographical location in the western Mediterranean region, the Iberian Peninsula involves a challenge for current climatic conditions and future projections. In this study we analysed monthly precipitation trends over mainland Spain from 1916 to 2020 by using the new MOPREDAS_century database. This database combines information from the Spanish Meteorological Agency's archives, as well as data retrieved from Annual Summaries between 1916 and 1950. A combination of both sources produced the largest amount of original information ever collected and researched in mainland Spain between 1916 and 2020. Idioma: Inglés DOI: 10.1002/joc.8060 Año: 2023 Publicado en: International Journal of Climatology 43, 8 (2023), 3828-3840 ISSN: 0899-8418 Factor impacto JCR: 3.5 (2023) Categ. JCR: METEOROLOGY & ATMOSPHERIC SCIENCES rank: 41 / 110 = 0.373 (2023) - Q2 - T2 Factor impacto CITESCORE: 7.5 - Atmospheric Science (Q1)