Putin may have missed his chance to invade Ukraine as I now see the temperatures across the country are now above freezing making travel with heavy equipment more difficult and he will have to wait till the summer

Some weather comment from the net.

"In spring, both the temperature and the sunshine hours grow rapidly. In March, the snow melts in continental areas, which turns into mud and can make it difficult to travel on rural roads. In April, the first warm days occur, though they can be followed by the return of cold weather, with possible snow and frosts. By May, the temperatures generally start to become permanently pleasant, especially in the second part."