San Bartolome, Spain has mild winters with temperatures ranging from 12-25°C in January and December, making them suitable for outdoor activities. Spring arrives in March, bringing warmer temperatures, averaging 19°C, while April and May see a gradual increase to 20-21°C. Summers are warm but not sweltering, peaking at 25-36°C in August, before cooling down slightly in September. Autumn sees a return to milder temperatures, with November and October averaging around 20-23°C.