Final answer:
El Nino and the tilt of the Earth's axis influence the world's weather around Christmas.
Step-by-step explanation:
One factor that influences the world's weather and usually starts around Christmas is El Nino. El Nino is a warm ocean current that flows off the west coast of South America every few years. It changes weather patterns around the world and may cause extreme weather in some regions.
Another factor that influences the world's weather around Christmas is the tilt of the Earth's axis. During this time, the northern hemisphere is leaning away from the sun, resulting in winter. The southern hemisphere, on the other hand, is leaning towards the sun, leading to summer.
The Earth's distance from the Sun does not significantly impact the seasons. Despite the Earth's orbit being slightly elliptical, the distance from the Sun only varies by about 3%. The primary factor causing the seasons is the 23.5° tilt of the Earth's axis.