Last night was the longest night of the year, in the northern hemisphere, 5 pm looked like midnight. The North Pole is leaning as far from the sun as it goes. In the Southern Hemisphere the foregoing is reversed.
Here winter begins today; down south summer begins today. North of the equator we call today the Winter Solstice.
In our nation's great southwestern desert midday today was quite mild, comfortable in a long sleeved shirt. This is our normal winter weather.
Up home in WY there wasn't much snow on the ground when I looked earlier this afternoon. Western WY won't have a white Christmas this year, the high is predicted to be 42℉. That will be weirdly warm for our combination of altitude and latitude.