Why did the German army not capture Moscow during World War II? Is it because of the weather?

The weather is only one of the reasons. More importantly, the German army's logistical supplies have been stretched to the limit. While ensuring the ammunition supply for the strategic offensive, there are no railway resources to transport cold-proof supplies. The deeper reason is Conflict between Hitler and the Wehrmacht. When the Wehrmacht demanded a direct attack on Moscow, Hitler demanded that the Kiev granary be obtained first. When the top brass of the Wehrmacht wanted to repair it, Hitler demanded continuous attacks. The fundamental reason lies in the controversy caused by the lack of supplies. Of course weather is the most important surface factor.