Dynamically downscaled 1-km climate dataset for the Balearic Islands under present and future conditions.

High-resolution climate data are essential for understanding local climate impacts, assessing vulnerability, managing resources, and developing adaptation strategies in regions sensitive to climate change. This is the case for the Balearic Islands, located in the Western Mediterranean, which are characterized by rich biodiversity, pronounced exposure to global warming, and strong socio-economic dependence on climate-sensitive sectors such as tourism, agriculture, and water resources. We present Balear1km, a new climate dataset of dynamically downscaled climate simulations over the Balearic Islands at 1 km spatial resolution and hourly time steps for the period 2009-2023. It includes two simulations produced with the Weather Research and Forecasting (WRF) model: a historical simulation driven by ERA5 reanalysis data, and a future simulation using the Pseudo-Global Warming approach, which applies a climate change signal from 30 global climate models (CMIP6, high-emission scenario SSP5-8.5) to current conditions. This dataset provides physically consistent climate information across land and sea, enabling exploration of how recent weather events may respond under future warming conditions. It can support research and applications in hydrology, ecology, agriculture, public health, and resource management.