Resumen: Rogation ceremonies are religious requests to God. Pro-pluvia rogations were celebrated during dry conditions to ask God for rain. In this work, we have recovered 37 pro-pluvia rogations from 14 documentary sources (e.g., : ecclesiastical manuscripts, books, and different magazines and newspapers). All of the rogations were celebrated in Extremadura region (interior of southwest of Spain) during the period 1824-1931. Climate of Extremadura is strongly dominated by the North Atlantic Oscillation (NAO). Therefore, pro-pluvia rogations have been associated to the NAO index and the relationship between them has been analyzed. The most relevant results are found in the relationship between pro-pluvia rogations in month n and the positive values of the NAO index for months n-1 and n-2, being statistically significant at 95% confidence level. Thus, the results evidence that the rogation ceremonies of Extremadura are a good proxy for the NAO index. Idioma: Inglés DOI: 10.3390/atmos11030282 Año: 2020 Publicado en: Atmosphere 11, 3 (2020), 282 [15 pp.] ISSN: 2073-4433 Factor impacto JCR: 2.686 (2020) Categ. JCR: METEOROLOGY & ATMOSPHERIC SCIENCES rank: 54 / 94 = 0.574 (2020) - Q3 - T2 Categ. JCR: ENVIRONMENTAL SCIENCES rank: 163 / 273 = 0.597 (2020) - Q3 - T2 Factor impacto SCIMAGO: 0.698 - Environmental Science (miscellaneous) (Q2) - Atmospheric Science (Q2)