Average temperatures in Lanzarote in December. In December temperatures are usually in the low 20s°C during the day time, but it can feel a lot warmer when the sun is out. It also depends on the wind on each specific day, as it can feel cooler when the wind is blowing hard. Average high temperature: 21.8°C (71.2°F) Mon 18 Dec 2023 06.18 EST Last modified on Mon 18 shooting of a mother and daughter allegedly by an Israeli military sniper in a church compound in Gaza City was a "cold-blooded mlG19.