This paper presents a set of models developed by the authors to predict short-time-step solar energy and daylight availability quantities, including global, direct, and diffuse daylight illuminance, diffuse irradiance, illuminance on tilted surfaces, sky zenith luminance, and sky luminance angular distribution. The models are designed to span all conditions from overcast to clear and rely on the same input data: hourly or higher-frequency direct and global irradiance, and surface dew point temperature. The models are validated using data from various climatic environments, ranging from maritime to high-altitude deserts for irradiance models and from temperate maritime to continental for daylight availability models. The models show significant improvements over existing methods in predicting these quantities. The experimental approach used to derive the models allows for simple delineation of particular configurations but may have limitations in terms of model validity and instrumentation accuracy. Further validation and development are recommended, especially for drastically different environments, to enhance accuracy and extend validation.This paper presents a set of models developed by the authors to predict short-time-step solar energy and daylight availability quantities, including global, direct, and diffuse daylight illuminance, diffuse irradiance, illuminance on tilted surfaces, sky zenith luminance, and sky luminance angular distribution. The models are designed to span all conditions from overcast to clear and rely on the same input data: hourly or higher-frequency direct and global irradiance, and surface dew point temperature. The models are validated using data from various climatic environments, ranging from maritime to high-altitude deserts for irradiance models and from temperate maritime to continental for daylight availability models. The models show significant improvements over existing methods in predicting these quantities. The experimental approach used to derive the models allows for simple delineation of particular configurations but may have limitations in terms of model validity and instrumentation accuracy. Further validation and development are recommended, especially for drastically different environments, to enhance accuracy and extend validation.