Warmer seas and shifting pressure systems: The signs that suggest the Mediterranean's climate is 'tropicalizing'

Nowhere in the Iberian Peninsula or the Balearic Islands has a tropical climate—for this to be the case, the average temperature in the coldest month would have to be 18°C (64 degrees Fahrenheit) or higher. The contrast between Spain's winters and summers, and the low temperatures reached in winter, do not resemble those of any tropical climate.