A model for cauliflower yield, developed in this work, uses averaged daily mean and minimum temperatures from the beginning of the low-temperature period before planting to curd initiation and also PAR values from curd initiation to harvest culmination. Most studies agree that for curd induction, relatively low temperature is required (Wurr and Fellows, 2000; Dixon, 2007). In the next developmental phase, curd growth is accelerated at higher temperatures, but there is also a positive relationship between its growth and amount of solar radiation received (Dixon, 2007). These findings confirm the relevance of such microclimatic parameters for inclusion in the developed equation. A surprise was that no single temperature variable, measured from curd initiation to harvest culmination, remained in the equation.