Whatever time of year you go it is normally possible to ride on the southern Sierra Nevada or the Costa Tropical 365 days a year.
Average temperature (per month)
Average days of sun and precipitation (per month)
The professional teams visit the Sierra Nevada area from February onwards for high altitude training camps in preparation towards the hilly classics or the Grand Tours. Amateur training camps start in January and run until November, with the peak season being March for spring training. In March, April and early May the conditions are perfect for cycling. The climbs are accessible all year round but it can be quite cold at 1500 MASL in early January. Summer months are generally quite hot and it becomes prohibitively hot from mid-day. Autumn is a great time to visit as the temperature cools and the nights are much cooler.