Hail size difference between South and North(with a hand for scale), hails are smaller and rarer during summer. During winter, the hails get bigger and more lethal, only hails in north are spiked.
Space Monsters are more active in higher temperatures, but would be hard for them to maintain a shape if it's too high. Their body gets stiff in lower temperatures, and will turn completely solid if it's low enough, at which they become very brittle and easy to break. The shards are very sharp and can cut skin easily, so wear a glove if you want to handle them. They can be restored as long as their "heart" is intact(at least 65% of it needs to be intact) and the temperature is optimal.