In context to seasons, it'll help to attach evgir (season) to it. I like to use "od evgir" as winter. evgirseod is an alternative (season-of-snow), but cold (krah) is certainly a good possibility. It depends on how you say it and with what context you say it. Since you can have cold weather in Spring, Fall, or even Summer, you'll have to describe a bit more.

I'm not sure how you can translate but you could use similar things like Krah "cold" or Krah Lok "cold weather" 

Just use your imagination