The start of colder weather depends heavily on the geographic location and climate of the area. Generally:
- In temperate regions such as much of Germany, autumn begins around September 23 and is characterized by gradually cooling temperatures. By October and November, colder and shorter days start to settle in, with average temperatures dropping to about 8°C in autumn. Winter follows from December to February, with average temperatures near freezing (0-1°C) and often dropping below freezing, especially at night or during cold waves.
- In places with central heating and typical temperate climates (examples from UK and parts of Europe), people generally begin to feel cold or start heating around when temperatures drop below 15-20°C, often in October or as soon as interior temperatures become cool.
- Meteorologically, winter is defined as starting on December 1 in many Northern Hemisphere countries, but cold weather generally begins earlier, during the late autumn months (October-November).
Therefore, the onset of cold weather usually starts in the autumn months of September-November, with noticeable cold and heating needs often starting in October, then becoming more definite by December when winter officially begins.
If the query is about a specific location, knowing that would help refine the answer. But for general temperate zones, the cold starts getting noticeable from October onwards and increasingly by December.
