What time of year are mosquitoes most active in Spain?
During winter and early spring, risk of dengue in Spain is low as mosquitoes are less active. The risk is highest in the months of May to November.
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On average, mosquitoes can survive between 50–80-degrees Fahrenheit. As they are cold-blooded, you'll find they are not active during the winter months! Cooler temperature makes mosquitoes inactive and could eventually kill them.