crisp, frosty, nipping, nippy, snappy, parky

pleasantly cold and invigorating; (`parky' is a British term); "crisp clear nights and frosty mornings"; "a nipping wind"; "a nippy fall day"; "snappy weather"

• cold — used of physical coldness; having a low or inadequate temperature or feeling a sensation of coldness or having been made cold by e.g. ice or refrigeration