Which feature of Los Carneros contributes to less diurnal variation in temperatures?

The feature of Los Carneros that contributes to less diurnal variation in temperatures is the prevailing maritime winds. These winds help moderate temperature fluctuations between day and night. During the day, the winds bring in cooler air from the Pacific Ocean, which prevents temperatures from rising too high. At night, the same winds help retain heat, preventing temperatures from dropping too low. This stabilizing effect allows for a more consistent temperature range throughout the day compared to regions without such wind patterns.

The elevation of land can influence temperature, but in the case of Los Carneros, it is the maritime influence that plays a more significant role in reducing diurnal temperature variation. Soil composition can affect drainage and heat retention but does not directly regulate temperature variations like maritime winds do. High humidity can also affect temperature perception and retention, but the primary factor here is the regular influx of cooler air from the ocean, which is facilitated by the prevailing winds.