The effects of climate change, "if any," have not affected the insurance market, billionaire Warren Buffett told CNBC on Monday—adding he's not calculating the probabilities of catastrophes any differently.

While the question of climate change "deserves lots of attention," Buffett said in a "Squawk Box" interview, "It has no effect ... [on] the prices we're charging this year versus five years ago. And I don't think it'll have an effect on what we're charging three years or five years from now." He added, "That may change ten years from now."

(Read more: I'd vote 'yes' on Keystone pipeline: Warren Buffett)

He said the U.S. has been "remarkably free of hurricanes" in the past five years with only slightly more tornadoes.