What was the reason why the Germans didn't capture Moscow during World War II? Is it because of the weather?

The weather is only one of the reasons. More importantly, Germany's logistics supply has reached its limit. Under the condition of ensuring the supply of strategic offensive ammunition, there is no railway resource to transport cold-proof materials. The deeper reason is the contradiction between Hitler and the Wehrmacht. When the Wehrmacht demanded a direct attack on Moscow, Hitler first demanded the granary in Kiev. When the high-level defense forces wanted to repair it, Hitler asked for a continuous attack. The root cause is the controversy caused by insufficient materials. Of course, the weather is the most important surface factor.